To estimate the FFO (Funds From Operations) / Net Debt ratio for 2022 based on S&P methodology, we follow these steps:

**1. Calculate FFO (Funds From Operations):**
S&P typically defines FFO as Cash Flow from Operating Activities adjusted for certain items (like working capital changes).
*   **Cash Flow from Operating Activities:** 1,566,829,000 EUR
*   **Adjustment for Working Capital:** S&P generally excludes changes in working capital from operating cash flow to arrive at FFO.
    *   "Increase Decrease In Working Capital": 574,568,000 EUR
*   **FFO Calculation:** 1,566,829,000 - 574,568,000 = 992,261,000 EUR.

**2. Calculate Net Debt:**
S&P methodology for Net Debt is Total Debt minus Cash and Cash Equivalents (plus potential adjustments for restricted cash or equivalents).
*   **Total Financial Liabilities (Current + Noncurrent):**
    *   Noncurrent Financial Liabilities: 5,543,755,000 EUR
    *   Current Financial Liabilities: 1,705,277,000 EUR
    *   Total Financial Liabilities: 7,249,032,000 EUR
*   **Cash and Cash Equivalents:** 794,824,000 EUR
*   **Net Debt Calculation:** 7,249,032,000 - 794,824,000 = 6,454,208,000 EUR.

**3. Calculate FFO / Net Debt Ratio:**
*   **Ratio:** 992,261,000 / 6,454,208,000 ≈ 0.1537

(Note: Under S&P methodology, adjustments for operating leases and pension liabilities are common, but given the provided data points, we rely on the core financial debt and operating cash flow metrics.)

<answer>0.1537</answer>