To estimate the Net Debt / EBITDA ratio for 2022 based on the S&P methodology, we need to calculate the Net Debt and the EBITDA for the period ending 2022 (which covers the 2022 fiscal year, using data tagged with `2022-01-01 - 2023-01-01` for flow items and `2023-01-01` for closing stock items, alongside the previous year's closing stock for averages if needed, though S&P typically uses closing balances for Net Debt and EBITDA for the period unless specified otherwise).

**1. Calculate Net Debt:**
Under S&P methodology, Net Debt is generally calculated as:
Net Debt = Total Financial Debt - Cash & Cash Equivalents

- **Total Financial Debt:** This typically includes short-term borrowings, current portion of long-term borrowings, and long-term borrowings.
  - Short-term Borrowings (2023-01-01): 4,446,000,000 EUR
  - Current Portion of Long-term Borrowings (2023-01-01): 3,097,000,000 EUR
  - Long-term Borrowings (2023-01-01): 19,374,000,000 EUR
  - Total Financial Debt = 4,446,000,000 + 3,097,000,000 + 19,374,000,000 = 26,917,000,000 EUR

- **Cash & Cash Equivalents (2023-01-01):** 10,155,000,000 EUR

- **Net Debt:** 26,917,000,000 - 10,155,000,000 = 16,762,000,000 EUR

**2. Calculate EBITDA:**
S&P calculates EBITDA as Operating Profit (EBIT) plus Depreciation and Amortization (D&A).
- **Profit Loss From Operating Activities (EBIT)** (2022-01-01 - 2023-01-01): 17,510,000,000 EUR
- **Depreciation And Amortisation Expense** (2022-01-01 - 2023-01-01): 7,205,000,000 EUR
- **EBITDA:** 17,510,000,000 + 7,205,000,000 = 24,715,000,000 EUR

*(Note: Although S&P often adjusts EBITDA for items like Share of Profit/Loss of Equity Accounted Investments and other non-cash items, we use the standard unadjusted EBITDA definition based on the directly provided operating profit and D&A, as specific adjustment details required by S&P are not factored into the basic standard ratio without further S&P specific adjustments provided in the prompt.)*

**3. Calculate Net Debt / EBITDA Ratio:**
Ratio = Net Debt / EBITDA
Ratio = 16,762,000,000 / 24,715,000,000 ≈ 0.6782

<answer>0.68</answer>