I need to calculate the Net Debt / EBITDA ratio for 2022 using S&P methodology.

First, let me identify the components needed:

**EBITDA**: This is "Beneficio Bruto De Explotacion Ebitda" for the period 2022-01-01 to 2023-01-01 (which represents 2022 results):
- EBITDA = 13,228,000,000 EUR

**Net Debt**: Under S&P methodology, this typically includes:
- Interest-bearing debt (short-term and long-term)
- Less: Cash and cash equivalents
- Less: Liquid investments (current financial assets that are readily convertible to cash)

Let me identify the debt components:

**Current Financial Liabilities** (2023-01-01, which is end of 2022):
- Total Current Financial Liabilities = 25,079,000,000 EUR
  - Deudas Con Entidades De Credito YObligaciones UOtros Valores Negociables Corrientes = 10,458,000,000 EUR
  - Instrumentos De Capital Con Caracteristicas De Pasivo Financiero Corriente = 87,000,000 EUR
  - Current Derivative Financial Liabilities = 3,398,000,000 EUR
  - Current Lease Liabilities = 151,000,000 EUR
  - Trade And Other Payables To Trade Suppliers = 5,927,000,000 EUR
  - Other Current Financial Liabilities = 5,058,000,000 EUR

For S&P methodology, we typically include:
- Bank debt and bonds (short-term and long-term)
- Capital instruments with debt characteristics
- Exclude trade payables and other operating liabilities

Let me be more precise. S&P Net Debt typically includes:
- Short-term borrowings + Long-term borrowings
- + Capital instruments with debt characteristics
- + Lease liabilities (sometimes included in adjusted net debt)
- - Cash and cash equivalents
- - Marketable securities/liquid investments

From the balance sheet at 2023-01-01 (end of 2022):

**Debt items:**
- Noncurrent Financial Liabilities total = 44,216,000,000 EUR
  - Deudas Con Entidades De Credito YObligaciones UOtros Valores Negociables = 36,129,000,000 EUR
  - Instrumentos De Capital Con Caracteristicas De Pasivo Financiero No Corriente = 576,000,000 EUR
  - Noncurrent Derivative Financial Liabilities = 3,690,000,000 EUR
  - Noncurrent Lease Liabilities = 2,287,000,000 EUR
  - Other Noncurrent Financial Liabilities = 1,534,000,000 EUR

- Current Financial Liabilities total = 25,079,000,000 EUR
  - Deudas Con Entidades De Credito YObligaciones UOtros Valores Negociables Corrientes = 10,458,000,000 EUR
  - Instrumentos De Capital Con Caracteristicas De Pasivo Financiero Corriente = 87,000,000 EUR
  - Current Derivative Financial Liabilities = 3,398,000,000 EUR
  - Current Lease Liabilities = 151,000,000 EUR
  - Trade And Other Payables To Trade Suppliers = 5,927,000,000 EUR (typically excluded as operating)
  - Other Current Financial Liabilities = 5,058,000,000 EUR

For S&P methodology, gross debt typically includes:
- Bank loans and bonds (deudas con entidades de crédito y obligaciones)
- Capital instruments with debt characteristics
- Sometimes derivatives if they represent debt-like obligations

Let me calculate more carefully using standard S&P approach:

**Gross Debt (S&P methodology)**:
- Short-term bank debt and bonds: 10,458,000,000 EUR
- Long-term bank debt and bonds: 36,129,000,000 EUR
- Capital instruments with debt characteristics (current): 87,000,000 EUR
- Capital instruments with debt characteristics (non-current): 576,000,000 EUR

Total bank debt and bonds + capital instruments = 10,458 + 36,129 + 87 + 576 = 47,250,000,000 EUR

Some S&P methodologies also include:
- Lease liabilities: 2,287,000,000 + 151,000,000 = 2,438,000,000 EUR

Let me check if there are other items. The "Other Noncurrent Financial Liabilities" (1,534,000,000) and "Other Current Financial Liabilities" (5,058,000,000) may or may not be debt-like. 

Looking at standard utility sector practice, S&P typically includes:
- All interest-bearing debt
- Hybrid instruments with debt characteristics

Let me use a comprehensive approach:

**Total Financial Debt** = Deudas (ST+LT) + Capital instruments + Other financial liabilities that are debt-like
= 10,458 + 36,129 + 87 + 576 + 1,534 + 5,058 = 53,842,000,000 EUR

Actually, let me be more careful. S&P Global Ratings methodology for utilities typically defines gross debt as:
- Short-term and long-term debt (including current portion of long-term debt)
- Capital leases/finance leases
- Hybrid instruments treated as debt
- Less: Cash and cash equivalents
- Less: Liquid financial investments

From the data:
- Cash And Cash Equivalents = 4,608,000,000 EUR
- Current Financial Assets = 4,813,000,000 EUR (includes other current financial assets and derivatives)

For Net Debt, we subtract cash and liquid investments:
- Cash = 4,608,000,000 EUR
- Other Current Financial Assets = 2,964,000,000 EUR (may include liquid investments)
- Current Derivative Financial Assets = 1,849,000,000 EUR

But derivative assets are typically not subtracted as "cash-like" unless they are clearly liquid. 

Let me use a standard approach:
**Gross Debt** = Total interest-bearing debt
= Deudas Con Entidades De Credito YObligaciones (ST + LT) + Capital instruments + Lease liabilities
= 10,458 + 36,129 + 87 + 576 + 2,287 + 151 
= 49,688,000,000 EUR

Or more broadly, using total financial liabilities minus trade payables:
= 25,079,000,000 + 44,216,000,000 - 5,927,000,000 (trade payables) 
= 63,368,000,000 EUR

This seems too high. Let me reconsider.

Actually, looking at S&P's standard definition more carefully for European utilities:

**Gross Debt** typically includes:
- Bank borrowings and bonds
- Finance lease obligations
- Pension deficit (sometimes)
- Less: Cash and cash equivalents

Let me use the most common S&P approach:
- Short-term debt: 10,458,000,000 (deudas corrientes) + 87,000,000 (capital instruments current) = 10,545,000,000
- Long-term debt: 36,129,000,000 + 576,000,000 = 36,705,000,000
- Lease liabilities: 2,287,000,000 + 151,000,000 = 2,438,000,000

Total Gross Debt = 10,545 + 36,705 + 2,438 = 49,688,000,000 EUR

**Cash and cash equivalents** = 4,608,000,000 EUR

**Net Debt** = 49,688,000,000 - 4,608,000,000 = 45,080,000,000 EUR

But wait - I should check if there are other liquid assets. "Other Current Financial Assets" = 2,964,000,000 EUR. Some of these may be liquid.

Actually, looking more carefully at S&P methodology for Iberdrola specifically, they typically report "Net Debt" in their presentations. The standard calculation is:

Net Debt = Gross Financial Debt - Cash and Cash Equivalents

Where Gross Financial Debt includes:
- Bank borrowings
- Bond issues
- Finance lease liabilities
- Derivative financial liabilities (if negative fair value)

But excluding:
- Trade payables
- Other operating liabilities

Let me recalculate with a cleaner approach using the explicit debt items:

From Noncurrent Financial Liabilities (44,216,000,000):
- Deudas Con Entidades De Credito YObligaciones UOtros Valores Negociables: 36,129,000,000
- Instrumentos De Capital Con Caracteristicas De Pasivo Financiero No Corriente: 576,000,000
- Noncurrent Lease Liabilities: 2,287,000,000

From Current Financial Liabilities (25,079,000,000):
- Deudas Con Entidades De Credito YObligaciones UOtros Valores Negociables Corrientes: 10,458,000,000
- Instrumentos De Capital Con Caracteristicas De Pasivo Financiero Corriente: 87,000,000
- Current Lease Liabilities: 151,000,000

Total debt-like items = 36,129 + 576 + 2,287 + 10,458 + 87 + 151 = 49,688,000,000 EUR

Now subtract cash:
Net Debt = 49,688,000,000 - 4,608,000,000 = 45,080,000,000 EUR

But I need to check if derivatives should be included. S&P typically includes derivative liabilities at fair value in gross debt. So:

Add: Noncurrent Derivative Financial Liabilities = 3,690,000,000
Add: Current Derivative Financial Liabilities = 3,398,000,000

Total with derivatives = 49,688 + 3,690 + 3,398 = 56,776,000,000 EUR

Net Debt with derivatives = 56,776,000,000 - 4,608,000,000 = 52,168,000,000 EUR

Hmm, but derivative assets should also be considered. We have:
- Noncurrent Derivative Financial Assets = 3,661,000,000
- Current Derivative Financial Assets = 1,849,000,000

If we net derivatives (which is common), Net Derivative Liabilities = 3,690 + 3,398 - 3,661 - 1,849 = 1,578,000,000 EUR

So a net approach would be:
Gross Debt (excluding derivatives) = 36,129 + 576 + 2,287 + 10,458 + 87 + 151 = 49,688,000,000
Plus net derivative liability = 1,578,000,000
Total = 51,266,000,000
Less Cash = 4,608,000,000
Net Debt = 46,658,000,000 EUR

Actually, let me look at this from a different angle. Iberdrola is a major utility and S&P likely uses a standardized approach. Let me check if there's a simpler way.

Looking at the balance sheet, "Noncurrent Financial Liabilities" = 44,216,000,000 and "Current Financial Liabilities" = 25,079,000,000.

Total Financial Liabilities = 69,295,000,000

From this, we should exclude:
- Trade payables (operating): 5,927,000,000
- Maybe some other items

But actually, "Other Current Financial Liabilities" (5,058,000,000) and "Other Noncurrent Financial Liabilities" (1,534,000,000) might include debt-like items.

Let me try yet another approach. S&P typically calculates Net Debt as:

Total Debt (interest-bearing) - Cash and Cash Equivalents

For Iberdrola, looking at their annual report structure, the main debt items are:
- Deudas con entidades de crédito y obligaciones (bank debt and bonds)
- Lease liabilities
- Capital instruments with debt characteristics

Let me use:
Total Debt = 36,129 (LT bank/bonds) + 10,458 (ST bank/bonds) + 576 (LT capital instruments) + 87 (ST capital instruments) + 2,287 (LT leases) + 151 (ST leases) = 49,688 million EUR

Cash = 4,608 million EUR

Net Debt = 49,688 - 4,608 = 45,080 million EUR

But I should also consider if "Other Noncurrent Financial Liabilities" and "Other Current Financial Liabilities" contain debt. These could include:
- Deposits received
- Other financial obligations

Actually, looking more carefully at typical Spanish utility reporting, "Other Financial Liabilities" often includes items like:
- Guarantees received
- Derivatives (already separated here)
- Other items

For S&P, the key is to include all "interest-bearing" obligations. Let me check if there's pension debt included in provisions.

Noncurrent Provisions For Employee Benefits = 1,226,000,000
Current Provisions For Employee Benefits = 42,000,000

Pension deficits are sometimes included in net debt under S&P methodology.

Let me try a comprehensive S&P approach:
- Bank debt and bonds: 46,587,000,000 (36,129 + 10,458)
- Capital instruments with debt characteristics: 663,000,000 (576 + 87)
- Lease liabilities: 2,438,000,000 (2,287 + 151)
- Derivative liabilities (net): 1,578,000,000 (net position)
- Pension deficit: 1,268,000,000 (1,226 + 42)

Total Gross Debt = 52,534,000,000
Less Cash = 4,608,000,000
Net Debt = 47,926,000,000 EUR

Hmm, this is getting complicated. Let me step back and think about what S&P typically reports for Iberdrola.

Actually, I recall that S&P Global Ratings typically uses a simplified approach for utilities:
- Reported Gross Debt less Cash and Equivalents
- Sometimes including hybrid instruments at equity credit

For a standard calculation, let me use:
**Gross Debt** = Total Financial Liabilities excluding trade payables and clearly operating items
= 44,216 + 25,079 - 5,927 (trade payables) 
= 63,368 million EUR

But this includes "Other Current Financial Liabilities" and "Other Noncurrent Financial Liabilities" which may not all be debt.

Let me try to be more precise by using only clearly debt items:
- Deudas (bank loans and bonds): 46,587
- Capital instruments: 663
- Lease liabilities: 2,438
- Derivatives (net liability): 1,578

Total = 51,266 million EUR
Less Cash = 4,608 million EUR
Net Debt = 46,658 million EUR

Or if we gross up derivatives (include all derivative liabilities, exclude derivative assets from debt):
- Deudas: 46,587
- Capital instruments: 663
- Lease liabilities: 2,438
- Derivative liabilities: 7,088 (3,690 + 3,398)

Total Gross = 56,776
Less Cash = 4,608
Less Derivative assets = 5,510 (3,661 + 1,849)

Net = 56,776 - 4,608 - 5,510 = 46,658 million EUR

Interesting - same result! Because derivative assets and liabilities net out in the calculation if we treat them symmetrically.

Wait, let me recheck: 56,776 - 4,608 = 52,168 if we only subtract cash. Then if we also subtract derivative assets (5,510), we get 46,658.

But actually, the standard approach is:
Gross Debt includes derivative liabilities
Less: Cash
Less: Liquid financial assets (which may include some derivative assets if they are true assets)

Actually, for S&P, derivative assets are typically not subtracted as they are not "cash-like". So:

Net Debt = Gross Debt - Cash and Cash Equivalents
= (46,587 + 663 + 2,438 + 7,088) - 4,608
= 56,776 - 4,608
= 52,168 million EUR

But this seems high. Let me check if we should include all derivatives.

Actually, looking at typical S&P practice for European utilities, they often report "Net Debt" excluding derivatives or with derivatives netted. The most common approach is:

Net Debt = (Bank Debt + Bonds + Capital Instruments + Lease Liabilities) - Cash

= (46,587 + 663 + 2,438) - 4,608
= 49,688 - 4,608
= 45,080 million EUR

Let me verify with another approach. Looking at Iberdrola's typical reporting, they often report "Net Debt" around 40-50 billion EUR range.

Actually, I want to check one more thing. The "Noncurrent Financial Assets" includes:
- Investments In Associates = 857
- Cartera De Valores No Corrientes = 32
- Other Noncurrent Financial Assets = 5,958
- Noncurrent Derivative Financial Assets = 3,661

And "Current Financial Assets" includes:
- Other Current Financial Assets = 2,964
- Current Derivative Financial Assets = 1,849

Some of these might be liquid enough to subtract. "Cartera De Valores" (portfolio of securities) = 32 million is small. "Other Current Financial Assets" = 2,964 might include some liquid items.

For strict S&P methodology, typically only "Cash and Cash Equivalents" is subtracted, sometimes plus "short-term liquid investments".

Let me use the most standard S&P definition:
**Net Debt = Total Interest-Bearing Debt - Cash and Cash Equivalents**

Interest-bearing debt:
- Deudas con entidades de crédito y obligaciones: 46,587
- Instrumentos de capital con características de pasivo financiero: 663
- Pasivos financieros por arrendamiento: 2,438

Total = 49,688 million EUR

Less: Cash and Cash Equivalents = 4,608 million EUR

Net Debt = 45,080 million EUR

EBITDA = 13,228 million EUR

Net Debt / EBITDA = 45,080 / 13,228 = 3.41x

But wait, I want to double-check if S&P includes lease liabilities in net debt. Under IFRS 16, lease liabilities are included in debt. S&P typically includes them in adjusted debt metrics.

However, S&P also sometimes reports "Funds From Operations (FFO) to Debt" and other metrics where they make adjustments.

For pure "Net Debt / EBITDA", let me consider if there's a more standard Iberdrola-specific calculation.

Actually, I realize I should check whether to use 2022 year-end balance sheet or average balance sheet. For ratios, S&P typically uses year-end or point-in-time balances for debt and annual EBITDA.

Let me also verify: should I include the "Other Noncurrent Financial Liabilities" (1,534) and "Other Current Financial Liabilities" (5,058)?

These could include:
- Guarantees and deposits received (debt-like)
- Accrued interest (debt-like, but usually already in the debt items)
- Other financial obligations

If these are truly debt-like, they should be included. But without more detail, it's safer to exclude them or include only clearly identified debt.

Let me try a more inclusive approach:
Total Financial Liabilities = 69,295
Less: Trade payables = 5,927
Less: Clearly operating = ?

Actually, "Trade And Other Payables To Trade Suppliers" is explicitly separated. The remaining in Current Financial Liabilities is 25,079 - 5,927 = 19,152.

Total debt-like = 44,216 (noncurrent) + 19,152 (current ex-trade) = 63,368

Less: Cash = 4,608
Net Debt = 58,760

This seems too high and likely includes non-debt items.

Let me go back to my more conservative estimate of 45,080.

Actually, I want to check one more source of information. Looking at the equity statement, there's "Devengo De Intereses De Obligaciones Perpetuas Subordinadas" which suggests perpetual bonds. These are included in "Instrumentos De Capital Con Caracteristicas De Pasivo Financiero".

Also, I should check if there are any "Noncurrent Government Grants" or "Instalaciones Cedidas YFinanciadas Por Terceros" that should be treated as debt. These are:
- Noncurrent Government Grants = 1,247
- Instalaciones Cedidas YFinanciadas Por Terceros = 5,673

"Instalaciones Cedidas YFinanciadas Por Terceros" (facilities granted and financed by third parties) - this sounds like it could be debt-like, but it's classified outside financial liabilities. This might be "off-balance sheet" or structured arrangements.

For S&P methodology, these might need to be included if they are debt-like. However, without more information, I'll stick to the clearly identified financial liabilities.

Let me finalize my calculation with a moderate approach:

**Gross Debt (S&P)**:
- Bank loans and bonds (short and long term): 46,587
- Capital instruments with debt characteristics: 663
- Lease liabilities: 2,438
- Derivative liabilities (net of assets, or gross): let's use net approach for conservatism

Actually, for S&P credit ratings, they typically use "Total Debt" which includes:
- Short-term borrowings
- Current portion of long-term debt
- Long-term debt
- Capital leases/finance leases
- Hybrid instruments treated as debt

And "Total Cash" = Cash and cash equivalents + short-term liquid investments

For Net Debt / EBITDA, the standard is:
(Total Debt - Total Cash) / EBITDA

Let me use:
Total Debt = 46,587 + 663 + 2,438 = 49,688 (excluding derivatives)
Total Cash = 4,608

Net Debt = 45,080

Or if we include derivatives as debt:
Total Debt = 49,688 + 7,088 (derivative liabilities) = 56,776
Less: Total Cash = 4,608 + 5,510 (derivative assets) = 10,118? 

No, derivative assets are not "cash". So:
Net Debt = 56,776 - 4,608 = 52,168

But then we should consider if derivative assets can offset derivative liabilities. In fair value terms, yes, but for debt calculations, S&P typically looks at the economic substance.

I think the most standard approach for this exercise is:

**Net Debt = Interest-bearing debt - Cash and Cash Equivalents**

Where interest-bearing debt includes bank debt, bonds, capital instruments, and lease liabilities.

Net Debt = 49,688 - 4,608 = 45,080 million EUR

EBITDA = 13,228 million EUR

Ratio = 45,080 / 13,228 = 3.408...

Let me verify: 45,080 / 13,228 = 3.4079...

Rounded to 2 decimal places: 3.41

But I want to double-check my debt calculation. Let me re-add:
36,129 (LT bank/bonds) + 10,458 (ST bank/bonds) = 46,587
+ 576 (LT capital instruments) + 87 (ST capital instruments) = 663
+ 2,287 (LT leases) + 151 (ST leases) = 2,438

Total: 46,587 + 663 + 2,438 = 49,688

Yes, correct.

Net Debt = 49,688 - 4,608 = 45,080

Ratio = 45,080 / 13,228 = 3.41

Actually, let me also consider if "Other Noncurrent Financial Liabilities" (1,534) and "Other Current Financial Liabilities" (5,058) should be included. Looking at the description, these are "Other" which could include various items. 

If we include them:
Total Debt = 49,688 + 1,534 + 5,058 = 56,280
Net Debt = 56,280 - 4,608 = 51,672
Ratio = 51,672 / 13,228 = 3.91

This is significantly different. Let me think about what these "Other" items might be.

In Iberdrola's financial statements, "Other Financial Liabilities" typically includes:
- Derivatives (already separated in this data)
- Payables to partners in joint operations
- Guarantees received
- Other miscellaneous items

Some of these are debt-like, some are not. Without more detail, it's hard to say.

However, looking at the structure, the main debt items are clearly separated as "Deudas Con Entidades De Credito YObligaciones" (bank debt and bonds). The "Other" category is likely less debt-like.

For a conservative S&P approach, let me check if there's any indication in the cash flow statement. The financing activities show:
- Emisiones YDisposiciones De Deudas (issuance and disposal of debts) = 14,826
- Reembolso De Deudas (repayment of debts) = -10,272

This suggests active debt management of the main debt categories.

I think my original estimate of 45,080 for Net Debt is reasonable for the standard S&P methodology.

Let me also verify the EBITDA figure. "Beneficio Bruto De Explotacion Ebitda" = 13,228,000,000 EUR. This is explicitly labeled as EBITDA, so it's correct.

Final calculation:
Net Debt / EBITDA = 45,080 / 13,228 = 3.4079...

Rounding: 3.41

But let me also try an alternative that S&P might use: including all financial liabilities except trade payables and clearly operating items, and subtracting all cash and liquid financial assets.

Liquid financial assets:
- Cash = 4,608
- Cartera De Valores No Corrientes = 32 (small, portfolio of securities)
- Maybe some of Other Current Financial Assets = 2,964

If we consider "Other Current Financial Assets" as liquid (which is aggressive):
Total Cash-like = 4,608 + 2,964 = 7,572

Net Debt = 49,688 - 7,572 = 42,116
Ratio = 42,116 / 13,228 = 3.18

Or if we include all current financial assets (4,813) as cash-like:
Net Debt = 49,688 - 4,813 = 44,875
Ratio = 44,875 / 13,228 = 3.39

This is close to my original 3.41.

Actually, I want to reconsider one more time. S&P Global Ratings specifically for Iberdrola might use a slightly different definition. Let me check if there's any hybrid equity treatment.

The "Instrumentos De Capital Con Caracteristicas De Pasivo Financiero" (capital instruments with debt characteristics) - these are perpetual or hybrid instruments. S&P typically gives partial equity credit to these (e.g., 50% equity credit for hybrids).

If S&P gives 50% equity credit to these instruments:
- LT capital instruments: 576, treated as 288 debt
- ST capital instruments: 87, treated as 43.5 debt

Adjusted debt = 46,587 + 288 + 43.5 + 2,438 = 49,356.5
Net Debt = 49,356.5 - 4,608 = 44,748.5
Ratio = 44,748.5 / 13,228 = 3.38

This is very close to my original 3.41.

Given the various approaches converge around 3.4x, I'll use my original calculation.

Actually, let me try one more precise calculation without rounding:

Net Debt = 45,080,000,000
EBITDA = 13,228,000,000

Ratio = 45,080 / 13,228 = 3.407920...

To 2 decimal places: 3.41

Or should I express as 3.4? Let me check S&P's typical reporting - they usually report to one or two decimal places.

I'll provide 3.41 as my best estimate.

Wait, I want to re-verify one thing. Should I use the "Previously Stated Member" values or the 2023-01-01 values? The 2023-01-01 values represent the end of 2022 (since the annual report is for year-end 2022, with 2023-01-01 being the balance sheet date in some reporting conventions, or it's the comparative restated balance).

Actually, looking more carefully at the dates:
- "2023-01-01" appears to be the current reporting date (end of 2022, beginning of 2023)
- "Previously Stated Member" "2022-01-01" is the prior year comparative

For 2022 ratio, I should use 2022 year-end balances, which are the "2023-01-01" values (current year end).

And EBITDA for 2022 is the period "2022-01-01 - 2023-01-01".

So my values are correct.

Let me do a final sanity check. Iberdrola is a major utility with significant investments. A Net Debt/EBITDA around 3.4x seems reasonable for a utility in 2022, especially given the energy crisis and investment needs.

Actually, I want to check one more thing. Does S&P use "adjusted EBITDA" or reported EBITDA? S&P typically makes adjustments to EBITDA for their credit metrics, including:
- Adding back restructuring charges
- Adjusting for non-recurring items
- Deducting cash taxes (for some metrics, but not for Debt/EBITDA)

For this exercise, since we only have reported figures, I'll use reported EBITDA.

Final answer: 3.41

Hmm, but let me reconsider if I should include the derivative liabilities. In modern credit analysis, especially post-2008, derivatives are typically included in gross debt at fair value. So:

Gross Debt = 46,587 (bank/bonds) + 663 (capital instruments) + 2,438 (leases) + 7,088 (derivative liabilities) = 56,776
Less: Cash = 4,608
Net Debt = 52,168

Ratio = 52,168 / 13,228 = 3.94

This is significantly higher. But wait - if we include derivative liabilities, should we also consider derivative assets? In a net debt calculation, we typically subtract cash-like assets, not derivative assets.

However, some analysts net derivative positions: if you have a derivative liability, it's because you're "short" a derivative, and if you have a derivative asset, you're "long". These could be offsetting positions.

Looking at Iberdrola's business, they likely use derivatives for hedging commodity and interest rate exposures. The derivative liability represents the fair value of derivatives "underwater", while derivative assets represent those "in the money".

For a true economic picture, netting makes sense if the positions are related. But for S&P's standard methodology, they typically include derivative liabilities in debt and do not net derivative assets unless there is a legal right of set-off.

Actually, looking at S&P's corporate methodology, they state:
"Derivative instruments are included at their marked-to-market value. We include derivative liabilities as debt and derivative assets as part of cash and investments only if they are highly liquid and available to repay debt."

So for strict S&P methodology:
- Include derivative liabilities in debt: 7,088
- Do NOT include derivative assets as cash: only true cash 4,608

Net Debt = 56,776 - 4,608 = 52,168
Ratio = 3.94

But this seems high. Let me check if this is consistent with market data.

Actually, I recall that Iberdrola's reported net debt is typically around 40-45 billion EUR, not 52 billion. This suggests that derivatives might not be fully included, or they're netted in practice.

Looking at Iberdrola's own reporting, they typically report "Net Debt" excluding derivatives or with derivatives netted.

For this exercise, I'll use the more common approach of excluding derivatives from the main debt calculation, or using a net derivative position.

Net derivative position = 7,088 - 5,510 = 1,578 liability

Net Debt = (46,587 + 663 + 2,438 + 1,578) - 4,608 = 51,266 - 4,608 = 46,658

Ratio = 46,658 / 13,228 = 3.53

Or if we exclude derivatives entirely:
Net Debt = 45,080
Ratio = 3.41

Given the range is 3.41 to 3.94 depending on derivative treatment, and 3.41 is the most common "headline" net debt figure, I'll stick with 3.41 as my best estimate for standard S&P Net Debt/EBITDA.

Actually, one more consideration: S&P sometimes uses "FFO" or "Funds From Operations" based metrics rather than pure EBITDA. But the question specifically asks for Net Debt / EBITDA.

Let me finalize with 3.41.

<answer>3.41</answer>