To estimate the Funds From Operations (FFO) / Net Debt ratio for Ferrovial S.A. for the year 2022, we must identify the relevant components from the provided data.

**1. Funds From Operations (FFO) Estimation:**
FFO is typically calculated as the Cash Flow from Operating Activities, adjusted for changes in working capital and non-cash items. Based on the provided cash flow statement:
*   "Cash Flows From Used In Operating Activities" (2022-01-01 to 2023-01-01): 1,002,000,000 EUR
*   "Increase Decrease In Working Capital" (2022-01-01 to 2023-01-01): 83,000,000 EUR
Common practice is to adjust the cash flow from operations by subtracting the change in working capital to isolate the core operating cash flow:
FFO ≈ 1,002,000,000 - 83,000,000 = 919,000,000 EUR.

**2. Net Debt Estimation:**
Net Debt is calculated as Total Debt (Current + Noncurrent) minus Cash and Cash Equivalents.
*   Noncurrent Borrowings ("Noncurrent Portion Of Other Noncurrent Borrowings"): 10,776,000,000 EUR
*   Current Borrowings ("Current Borrowings And Current Portion Of Noncurrent Borrowings"): 877,000,000 EUR
*   Total Gross Debt = 10,776,000,000 + 877,000,000 = 11,653,000,000 EUR
*   Cash and Cash Equivalents ("Cash And Cash Equivalents" 2023-01-01): 5,130,000,000 EUR
*   Net Debt = 11,653,000,000 - 5,130,000,000 = 6,523,000,000 EUR

**3. Ratio Calculation:**
FFO / Net Debt = 919,000,000 / 6,523,000,000 ≈ 0.140886

Note: The data provided covers the period ending 2023-01-01 (the end of 2022). Using these values:
FFO ≈ 919 million
Net Debt ≈ 6,523 million
Ratio ≈ 0.1409

<answer>0.1409</answer>