To estimate the FFO / Net Debt ratio for 2022 based on S&P methodology, we first need to calculate the components: Funds From Operations (FFO) and Net Debt.

1. **FFO Calculation:**
Under S&P's methodology, FFO is typically defined as Profit From Continuing Operations (Net Profit) plus non-cash items like Depreciation, Amortization, and Impairments, minus non-cash gains. 
From the provided data for the period 2022-01-01 to 2023-01-01:
- Profit Loss = 4,417,000,000 EUR
- Adjustments For Depreciation And Amortisation Expense = 3,613,000,000 EUR
- Adjustments For Provisions And Adjustments For Impairment Loss = 0 EUR
- Adjustments For Losses Gains On Disposal Of Noncurrent Assets = -68,000,000 EUR (This represents a gain of 68M, which should be subtracted)
- Adjustments For Fair Value Gains Losses = -236,000,000 EUR (This represents a gain of 236M, which should be subtracted)
- Expense From Sharebased Payment Transactions With Employees = 356,000,000 EUR (Non-cash expense added back)

FFO = 4,417 + 3,613 + 0 - 68 - 236 + 356 = 8,082,000,000 EUR.
*(Note: S&P sometimes uses Operating Profit + D&A, which would be 6,489 + 3,613 = 10,102M, but the standard Net Income + D&A - Gains approach yields 8,082M. Using the most standard definition: 8,082M)*

2. **Net Debt Calculation:**
Net Debt = Total Financial Debt - Cash and Cash Equivalents.
From the Balance Sheet at 2023-01-01 (end of 2022):
- Noncurrent Portion Of Noncurrent Bonds Issued = 20,425,000,000 EUR
- Noncurrent Portion Of Other Noncurrent Borrowings = 3,205,000,000 EUR
- Noncurrent Lease Liabilities = 1,580,000,000 EUR
- Shortterm Borrowings = 6,368,000,000 EUR
- Current Lease Liabilities = 522,000,000 EUR
Total Financial Debt = 20,425 + 3,205 + 1,580 + 6,368 + 522 = 32,100,000,000 EUR.

- Cash And Cash Equivalents = 12,578,000,000 EUR
- Current Cash Management Financial Assets = 755,000,000 EUR (Usually considered highly liquid equivalents)
Total Cash & Equivalents = 12,578 + 755 = 13,333,000,000 EUR.

Net Debt = 32,100,000,000 - 13,333,000,000 = 18,767,000,000 EUR.

3. **Ratio Calculation:**
FFO / Net Debt = 8,082,000,000 / 18,767,000,000 ≈ 0.4307 or 43.1%.

If calculated using Operating Profit + D&A for FFO (10,102M):
FFO / Net Debt = 10,102 / 18,767 ≈ 53.8%.

Using the strict Net Income + D&A - Gains formulation (8,082M), the ratio is 43.1%. Let's provide 0.43.

<answer>0.43</answer>