To estimate the FFO (Funds From Operations) to Net Debt ratio for ENEL SpA for the year 2022 according to S&P methodology, we proceed as follows:

**1. Calculate FFO (Funds From Operations):**
S&P typically defines FFO as Cash Flow from Operating Activities (CFO) adjusted for non-cash working capital changes and specific items.
*   **CFO (Continuing):** 8,674,000,000 EUR
*   **Working Capital Adjustments:** The increase/decrease in working capital was 3,961,000,000 EUR. In S&P methodology, we back out these changes to arrive at a standardized FFO.
*   **Adjustments:** We include "Dividends received from associates" (often part of CFO) and adjust for non-cash items.
*   *Formula approximation:* FFO $\approx$ CFO + Increase/Decrease in Working Capital - (Items not relevant to operations).
*   However, a simpler standard approach for FFO is: (Cash Flow from Operating Activities - Changes in Working Capital).
*   Calculation: $8,674,000,000 - 3,961,000,000 = 4,713,000,000$ EUR.

**2. Calculate Net Debt:**
S&P defines Net Debt as Total Financial Debt minus Cash and Cash Equivalents (and marketable securities).
*   **Total Debt:** Includes Short-term borrowings (13,306,000,000), Current portion of long-term borrowings (4,031,000,000), and Long-term borrowings (54,500,000,000).
*   Total Debt = $13,306,000,000 + 4,031,000,000 + 54,500,000,000 = 71,837,000,000$ EUR.
*   **Cash and Cash Equivalents (2022):** 8,858,000,000 EUR.
*   **Net Debt:** $71,837,000,000 - 8,858,000,000 = 62,979,000,000$ EUR.

**3. Calculate FFO/Net Debt Ratio:**
*   Ratio = $4,713,000,000 / 62,979,000,000 \approx 0.07483$.

*Self-Correction on S&P methodology:* S&P often adds back "Adjustments for Accruals to Provisions" and ignores the impact of specific non-recurring charges if material. Using the basic operating cash flow reconciliation:
$4,713,000,000 / 62,979,000,000 = 0.07483$.

<answer>0.07483</answer>