I need to estimate the FFO / Net Debt ratio for 2022.

**Step 1: Estimate FFO (Funds From Operations)**

FFO is typically calculated as net income plus depreciation & amortization plus impairment losses minus reversal of impairment losses, adjusted for non-cash items. A common approach for utility companies:

FFO ≈ Net Income + Depreciation & Amortization + Impairment Losses - Reversal of Impairment Losses + Other non-cash adjustments

For the period 2022-01-01 to 2023-01-01 (i.e., fiscal year 2022):

- Profit Loss: 1,948,767,000 EUR
- Depreciation & Amortization: 462,694,000 EUR
- Impairment Loss: 197,761,000 EUR
- Reversal of Impairment Loss: 125,973,000 EUR
- Valuation and Realisation of Energy Derivatives: -857,961,000 EUR (this is a non-cash item that should be added back)
- Wertminderungen (impairments on investments): 46,455,000 EUR
- Wertaufholungen (reversals on investments): 0 EUR

Actually, let me use a simpler and more standard approach. FFO for a utility is often approximated as:

FFO = Cash Flows from Operating Activities - changes in working capital

Looking at the cash flow statement, the operating cash flow is 2,019,859,000 EUR. But FFO typically excludes working capital changes. 

From the cash flow data:
- Operating Cash Flow: 2,019,859,000
- The "Subtotal" before working capital changes: 2,516,130,000

FFO is often approximated by the subtotal before working capital changes, which represents cash earnings before working capital movements. So FFO ≈ 2,516,130,000 EUR.

Alternatively, a simpler approach: FFO = EBITDA - Interest Expense - Income Tax Expense = 3,160,679,000 - 101,703,000 - 583,352,000 = 2,475,624,000 EUR

I'll use the subtotal from cash flow (2,516,130,000) as it's a more direct FFO measure.

**Step 2: Calculate Net Debt**

Net Debt = Total Financial Liabilities - Cash and Cash Equivalents

At 2023-01-01 (end of 2022):
- Noncurrent Financial Liabilities: 2,844,559,000 EUR
- Current Financial Liabilities: 1,109,297,000 EUR
- Total Financial Liabilities: 3,953,856,000 EUR
- Cash and Cash Equivalents: 409,252,000 EUR

Net Debt = 3,953,856,000 - 409,252,000 = 3,544,604,000 EUR

**Step 3: Calculate FFO / Net Debt**

FFO / Net Debt = 2,516,130,000 / 3,544,604,000 ≈ 0.710

Let me also check with the simpler EBITDA-based FFO:
2,475,624,000 / 3,544,604,000 ≈ 0.698

The ratio is approximately 0.71.

<answer>0.71</answer>