To find the FFO / Net Debt ratio for 2022, we first determine the Funds From Operations (FFO) and the Net Debt for the year ending 2023-01-01 (which represents the financial position at the end of 2022).

**1. Funds From Operations (FFO)**
FFO is typically represented by the operating cash flow before changes in working capital. In the provided cash flow statement components, this matches the "Subtotal" line calculated before working capital adjustments (such as changes in receivables, payables, inventories, etc.).
* Subtotal (FFO) for 2022: 2,516,130,000 EUR

**2. Net Debt**
Net Debt is calculated as short-term and long-term interest-bearing financial liabilities minus cash and cash equivalents. 
Using the figures as of 2023-01-01:
* Noncurrent Financial Liabilities: 2,844,559,000 EUR
* Current Financial Liabilities: 1,109,297,000 EUR
* Total Debt = 2,844,559,000 + 1,109,297,000 = 3,953,856,000 EUR
* Cash and Cash Equivalents: 409,252,000 EUR

Net Debt = Total Debt - Cash and Cash Equivalents
Net Debt = 3,953,856,000 - 409,252,000 = 3,544,604,000 EUR

**3. FFO / Net Debt Ratio**
Ratio = FFO / Net Debt 
Ratio = 2,516,130,000 EUR / 3,544,604,000 EUR = 0.709848

<answer>0.7098</answer>