To estimate the S&P-adjusted FFO-to-Debt ratio for A2A Energia S.p.A. for 2022, we follow the prescribed workflow:

**Step 1: Identify Industry**
A2A Energia S.p.A. is a subsidiary of A2A S.p.A., engaged in the sale of electricity and gas, which falls under the "Unregulated Power and Gas" sector.

**Step 2: Estimate Adjusted_EBITDA**
- Reported EBITDA (Gross Operating Income): 1,505,000,000 EUR
- Nonrecurring items: The report mentions "Result From Nonrecurring Transactions" of 157,000,000 EUR. S&P methodology typically adjusts EBITDA to exclude non-recurring items. Given the result from non-recurring transactions is a positive profit, we subtract it to normalize:
- Adjusted_EBITDA = 1,505,000,000 - 157,000,000 = 1,348,000,000 EUR

**Step 3: Estimate FFO**
- FFO = Adjusted_EBITDA - cash_interest - cash_taxes
- Cash interest: "Net Financial Interests" is given as 90,000,000 EUR (Interest paid is 75,000,000 EUR; however, S&P generally uses total cash interest paid or reported). We use the 75,000,000 EUR interest paid.
- Cash taxes: "Income Taxes Paid" = 201,000,000 EUR
- FFO = 1,348,000,000 - 75,000,000 - 201,000,000 = 1,072,000,000 EUR

**Step 4: Estimate Adjusted_Debt**
- Reported Debt (Noncurrent financial liabilities + Current financial liabilities): 5,867,000,000 + 1,022,000,000 = 6,889,000,000 EUR
- Eligible Cash (Cash and cash equivalents): 2,584,000,000 EUR (Note: S&P typically applies a haircut or limits the use of cash if it is necessary for operations, but without specific constraints, we use the reported balance).
- Adjusted_Debt = 6,889,000,000 - 2,584,000,000 = 4,305,000,000 EUR

**Step 5: Calculate Ratio**
- FFO / Adjusted_Debt = 1,072,000,000 / 4,305,000,000 = 0.249012...

Rounding to four decimal places: 0.2490

<answer>0.2490</answer>