To estimate the FFO / Net debt ratio based on S&P methodology, we follow these steps:

**1. Calculate Funds From Operations (FFO):**
Standard S&P methodology defines FFO as Cash Flow from Operating Activities adjusted for certain items (like working capital changes). However, a common proxy is:
*FFO = Cash Flows from Operating Activities - Changes in Working Capital*
*   Cash Flows from Operating Activities (2022): 1,260,000,000 EUR
*   Adjustments for Working Capital:
    *   Decrease/Increase in Trade Receivables: -1,420,000,000
    *   Increase/Decrease in Trade Payables: 2,587,000,000
    *   Decrease/Increase in Inventories: -332,000,000
    *   Total Working Capital Change: -1,420M + 2,587M - 332M = 835,000,000 EUR
*   FFO = 1,260,000,000 - 835,000,000 = 425,000,000 EUR

*(Note: Under S&P, FFO is often calculated as EBITDA - Interest Paid - Taxes Paid)*
*   EBITDA (2022): 1,505,000,000 EUR
*   Interest Paid (2022): 75,000,000 EUR
*   Taxes Paid (2022): 201,000,000 EUR
*   FFO = 1,505M - 75M - 201M = 1,229,000,000 EUR (This is the standard credit metric approach).

**2. Calculate Net Debt:**
Net Debt = (Total Financial Liabilities - Cash and Cash Equivalents)
*   Total Current Financial Liabilities (Other Current Financial Liabilities): 1,022,000,000 EUR
*   Total Noncurrent Financial Liabilities (Other Noncurrent Financial Liabilities): 5,867,000,000 EUR
*   Total Gross Debt = 6,889,000,000 EUR
*   Cash and Cash Equivalents: 2,584,000,000 EUR
*   Net Debt = 6,889,000,000 - 2,584,000,000 = 4,305,000,000 EUR

**3. Calculate FFO / Net Debt Ratio:**
*   Ratio = 1,229,000,000 / 4,305,000,000 ≈ 0.28548

Rounding to reasonable precision:

<answer>0.2855</answer>