To calculate the Funds From Operations (FFO) to Net Debt ratio based on S&P methodology, we determine the normalized cash flow before changes in working capital and divide it by the total net financial debt.

**1. Calculate Funds From Operations (FFO):**
S&P generally defines FFO as Cash Flow from Operations (CFO) adjusted to exclude the cash flow impact from changes in working capital. 
* Cash Flows From Used In Operations (CFO) for 2022: €548,169,000
* Increase (Decrease) In Working Capital: -€336,750,000 (A negative figure in the cash flow statement implies a cash outflow due to a build-up in working capital).

To find the cash flow generated by core operations before this working capital drag:
FFO = CFO - Changes in Working Capital
FFO = €548,169,000 - (-€336,750,000) = €884,919,000

**2. Calculate Net Debt:**
Net Debt is calculated as Total Short-Term and Long-Term Financial Debt minus Cash and Cash Equivalents.
* Short-Term Financial Liabilities Excluding Other: €142,437,000
* Long-Term Financial Liabilities Excluding Other: €6,402,913,000
* Gross Financial Debt = €142,437,000 + €6,402,913,000 = €6,545,350,000
* Cash and Cash Equivalents: €451,946,000

Net Debt = €6,545,350,000 - €451,946,000 = €6,093,404,000
*(Note: Minor "Other" financial liabilities amounts of €290k and €34k do not materially move the denominator, remaining strictly around ~€6,093.7M)*

**3. FFO to Net Debt Ratio:**
FFO / Net Debt = €884,919,000 / €6,093,404,000 = 0.145225 (or 14.52%)

<answer>0.1452</answer>