Step 1 — Relevant industry  
ENGIE is a large integrated energy utility with regulated networks, renewables, thermal generation, supply, and energy services. Among the provided methodologies, the closest fit is a utility / power and gas framework, especially Regulated Utilities / Unregulated Power and Gas. For the ratio calculation, the provided sector text mainly points back to standard S&P corporate ratios and adjustments, so I apply the baseline formulas using available disclosed figures.

Step 2 — Estimate Adjusted EBITDA  

Use reported/reconstructed EBITDA. From the income statement:

- Current operating income including operating MtM and share in net income of equity-method entities = EUR 5,367m  
- Depreciation, amortization and provisions = EUR 5,187m  

A practical reconstructed EBITDA proxy:

Adjusted EBITDA ≈ Current operating income incl. operating MtM and equity-method income + D&A/provisions

= 5,367 + 5,187  
= EUR 10,554m

No clear lease, pension service-cost, guarantee, or proportional JV EBITDA data is provided. Nonrecurring items are significant, but the current operating income measure appears to be the cleaner operating metric versus total operating profit, so no further nonrecurring adjustment is applied.

Adjusted_EBITDA = EUR 10,554m

Step 3 — Estimate FFO  

Baseline:

FFO = Adjusted_EBITDA - cash_interest - cash_taxes

Use cash flow statement amounts:

- Interest paid classified as financing activities = EUR 822m  
- Interest received on cash and cash equivalents = EUR -194m, i.e. EUR 194m cash interest received  
- Net cash interest = 822 - 194 = EUR 628m  
- Income taxes paid = EUR 1,504m  

FFO = 10,554 - 628 - 1,504  
= EUR 8,422m

Step 4 — Estimate Adjusted Debt  

Reported debt at Dec. 31, 2022 / Jan. 1, 2023:

- Long-term borrowings = EUR 28,083m  
- Current borrowings and current portion of noncurrent borrowings = EUR 12,508m  

Reported debt = 28,083 + 12,508  
= EUR 40,591m

Hybrid adjustment: ENGIE has deeply subordinated perpetual notes in equity of EUR 3,393m. S&P often gives intermediate equity content to hybrids, commonly treating 50% as debt if eligible. Estimate hybrid debt portion:

Hybrid debt portion = 50% × 3,393 = EUR 1,696.5m

Eligible cash:

- Cash and cash equivalents = EUR 15,570m

No lease liability, pension deficit, guarantees, or other debt-like adjustments are provided in sufficient detail. Although provisions are material, they include operating/nuclear/decommissioning obligations and are not automatically added in full without detailed S&P adjustment data.

Adjusted_Debt = reported debt + hybrid debt portion - eligible cash  
= 40,591 + 1,696.5 - 15,570  
= EUR 26,717.5m

Step 5 — FFO / Adjusted Debt  

FFO / Adjusted_Debt = 8,422 / 26,717.5  
= 0.315222

Rounded to four decimals:

<answer>0.3152</answer>