I'll work through this step-by-step following S&P methodology for ENGIE.

## Step 1: Identify the Relevant Industry

ENGIE is a large European utility company with both regulated utility operations and unregulated power and gas operations. It's a multi-utility that spans regulated networks and unregulated generation/supply. I'll apply a blend of the **Regulated Utilities** and **Unregulated Power and Gas** methodologies, using the general corporate framework for financial metrics.

## Step 2: Estimate Adjusted EBITDA

First, I need to reconstruct EBITDA from the reported figures.

**Starting with Operating Income (Current Operating Income Including Operating MtM):**
- Current Operating Income Including Operating MtM = 4,309M EUR

**Add back Depreciation, Amortization and Provisions:**
- D&A and Provisions = 5,187M EUR

**EBITDA (basic) = 4,309 + 5,187 = 9,496M EUR**

**S&P Adjustments:**

1. **Operating lease adjustments:** Property, Plant & Equipment includes right-of-use assets under IFRS 16. S&P typically reclassifies operating leases. I'll estimate lease depreciation is embedded in D&A. For simplicity with the data available, I'll note this is already partially captured.

2. **Share of equity method income:** S&P often removes equity method income and may add back dividends received. The equity method income is 1,059M. From the cash flow statement, dividends received from investing = 18M, plus we can estimate dividends from associates from "Adjustments For Dividend Income" = 713M (absolute value). So dividend income from equity investments ≈ 713M.
   - Remove equity income: -1,059M
   - Add dividends received: +713M
   - Net adjustment: -346M

3. **Non-recurring items / MtM adjustments:** The "Adjustments For Gains Losses On Change In Fair Value Of Derivatives" = -3,661M (this was an add-back in cash flow, meaning it was a non-cash loss). S&P would typically normalize for unrealized MtM. However, the "Current Operating Income Including Operating MtM" already includes operating MtM, so I need to be careful. The large MtM derivatives impact appears below operating income.

4. **Impairment losses:** 2,774M in impairments - these are non-recurring and below current operating income, so they don't affect our EBITDA calculation starting from current operating income.

5. **Restructuring costs:** 230M - already below current operating income line.

**Adjusted EBITDA = 9,496 - 346 = 9,150M EUR**

Let me also consider S&P's typical approach more carefully. S&P often starts from cash flow from operations before working capital:

Cash flows before WC changes = 12,415M EUR

This includes adjustments for non-cash items. Let me reconcile:
- Starting from Profit/Loss from operations: 1,127M
- Add back: Net D&A/impairment/provisions: 8,057M
- Add back: Non-cash derivative losses: 3,661M
- Impact of scope changes: 74M
- Other non-cash: 157M
- Remove equity income: 1,059M
- Add dividend income: 713M
- Remove income tax: -83M (credit, so add 83M)
- Remove finance costs: 3,003M
- Less: changes in scope: -74M

Cash flow before WC = 12,415M

**For S&P Adjusted EBITDA, I'll use approximately:**
EBITDA ≈ Cash flows before WC + cash interest + cash taxes - non-recurring adjustments

Cash interest paid (net) = 822M - 194M = 628M (from financing) + 37M from investing = 665M approximately. Let me use interest paid = 822M and interest received on cash = 194M. Net cash interest ≈ 628M.

Cash taxes = 1,504M

So: Adjusted EBITDA ≈ 12,415 - 83 (tax add-back needs removal since it was a credit) ... 

Let me use a cleaner approach:

**Adjusted EBITDA = Cash flows from operations before WC changes + cash interest paid (net) + cash taxes paid**

= 12,415 + (822 - 194) + 1,504 = 12,415 + 628 + 1,504 = **14,547M EUR**

Wait, but this includes items from discontinued operations effects. Let me verify. The cash flow before WC is from continuing operations context given the line items. But the operating cash flow splits show continuing = 8,488M and discontinued = 98M.

Actually, S&P typically works with total company figures. Let me stick with total.

But I need to reconsider - the 12,415M is "before changes in working capital" for the total group. The cash interest and taxes are also total.

Adjusted EBITDA ≈ 14,547M EUR

However, this seems high. Let me cross-check with the income statement approach:

Current Operating Income incl MtM + D&A = 4,309 + 5,187 = 9,496M

The difference is the large MtM derivative adjustments (3,661M add-back in cash flow) and other non-cash items. S&P would typically exclude unrealized MtM. The 3,661M unrealized derivative loss would be added back.

Let me also add impairments (non-cash): included in the 8,057M net D&A/impairment figure.

Starting from operating profit: 1,127M
+ Net D&A/impairment/provisions: 8,057M (includes impairments of ~2,774M)
+ Unrealized derivative losses: 3,661M
+ Other non-cash: 157M
- Equity income (add back dividends): -1,059 + 713 = -346M
- Non-recurring scope changes: -74M
= ~11,572M

That's closer to an EBITDA. But for S&P, they'd likely normalize:
- Remove impairments as non-recurring: the 8,057M includes about 2,774M impairments beyond normal D&A of 5,187M. Actually, the 8,057M figure is "Net Depreciation Amortization Impairment And Provisions" from cash flow.
- S&P adds back D&A but treats impairments as non-recurring for EBITDA.

Let me use a refined approach:

**S&P Adjusted EBITDA:**
= Current Operating Income incl MtM (4,309M) + D&A (5,187M) + equity dividends - equity income adjustment
= 4,309 + 5,187 + 713 - 1,059 = 9,150M

Then add operating lease adjustment. Under IFRS 16, lease depreciation and interest are already in the accounts. S&P adds back the full lease payment and removes lease depreciation and interest. Without explicit lease data, I'll estimate from the difference in provisions-related items. 

Actually, for S&P purposes with IFRS 16 companies, they add an operating lease expense back. The Property, Plant & Equipment likely includes right-of-use assets. Without specific lease data, I'll approximate the lease adjustment is modest relative to ENGIE's size, perhaps ~500M for lease payments.

Let me keep Adjusted EBITDA ≈ **9,150M EUR** as base, adding ~500M for lease adjustment = **~9,650M EUR**

Actually, let me reconsider using the cash-flow-based approach more carefully, which is more standard for S&P:

**FFO approach from cash flows:**
Operating cash flow (continuing) = 8,488M
+ Working capital changes: 2,424M (these were deducted, so add back)
= Cash flow before WC = 10,912M (continuing only)

But the reported "Cash Flows From Used In Operations Before Changes In Working Capital" = 12,415M includes adjustments. This is the total figure.

Let me use continuing operations: 8,488 + 2,424 + 1,504 (taxes) = 12,416M approximately for continuing. This matches 12,415M.

For S&P EBITDA: 12,415 + 628 (net interest) + 1,504 (taxes) = 14,547M

But this includes non-cash items normalization. The 12,415M already adds back non-cash impairments, MtM, etc. S&P EBITDA shouldn't include these extraordinary non-cash items being added back beyond D&A.

Let me be more precise:

S&P EBITDA from income statement:
Revenue: 93,865
- Purchases: 74,535
- Employee costs: 8,078
- Taxes other than income: 3,380
+ Other income: 1,624
= Current Operating Income before D&A = 9,496M
(This matches 4,309 + 5,187)

S&P adjustments:
- Remove share of equity method: already not included in 9,496M (it's added at the next line)
- Add dividends from associates: +713M
- Operating lease adjustment: approximately +500M (estimated)

**Adjusted EBITDA ≈ 9,496 + 713 + 500 = 10,709M EUR**

I'll use approximately **10,700M EUR**.

## Step 3: Estimate FFO

**FFO = Adjusted EBITDA - cash interest - cash taxes**

Cash interest:
- Interest paid (financing): 822M
- Interest received on cash: -194M  
- Interest from investing: -(-37M) = this is -37M which seems like net interest paid in investing
- Net cash interest ≈ 822 - 194 + 37 = 665M

But S&P also adds interest on leases. Under IFRS 16, lease interest is in finance costs. If I've already added back lease expense in EBITDA, I need to include lease interest here. Let me estimate lease interest at ~150M.

So total S&P cash interest ≈ 665 + 150 = ~815M. 

Actually, if I'm adding back the full lease rental in EBITDA (~500M), and the lease components include depreciation (~350M) and interest (~150M), then interest should include the lease interest portion. But since Finance Costs of 3,700M already includes lease interest under IFRS 16, and cash interest paid of 822M likely includes lease payments... Let me simplify.

S&P cash interest ≈ 822 - 194 = **628M** (if lease interest is already in the 822M)

Also need to add hybrid bond coupon. Operations on deeply subordinated perpetual notes show 77M in retained earnings (coupons paid). S&P treats hybrid equity content typically at 50%, so ~50% of coupon might be interest. But S&P's hybrid treatment: for ENGIE's hybrids (3,393M), S&P typically gives 50% equity credit, meaning 50% is debt-like. The coupon on the debt portion should be treated as interest.

Hybrid coupon ≈ 77M (net to retained earnings, which represents after-tax coupon). The actual coupon paid is likely higher. From the equity statement, "Operations On Deeply Subordinated Perpetual Notes" - Retained Earnings = -77M and Deeply Subordinated Notes = -374M. The 374M includes redemptions. The 77M represents coupons.

S&P interest adjustment for hybrids (50% of coupon): ~39M

Cash taxes = 1,504M

**FFO = 10,700 - 628 - 39 - 1,504 = 8,529M EUR**

Let me also account for the Cash Flow On Derivatives qualifying as net investment hedges: 216M. This is a financing cash outflow. S&P might not adjust for this.

**FFO ≈ 8,500M EUR**

## Step 4: Estimate Adjusted Debt

**Reported debt:**
- Long-term borrowings: 28,083M
- Current borrowings: 12,508M
- Total reported debt = 40,591M

**S&P adjustments:**

1. **Lease liabilities:** Already included in reported debt under IFRS 16. S&P recognizes these. Included above.

2. **Pension/post-retirement obligations:** Noncurrent provisions = 24,663M. This includes nuclear provisions, environmental provisions, employee benefits, etc. For ENGIE, a significant portion relates to nuclear decommissioning and employee benefits.
   - Employee benefit obligations (pension deficit): Without specific breakdown, I'll estimate pension-related provisions at roughly 30-40% of noncurrent provisions. ENGIE's actuarial gains were 2,718M in OCI, suggesting significant pension obligations. Estimate pension deficit ≈ ~8,000M.
   - S&P adds underfunded pension: ~8,000M (rough estimate)

3. **Hybrid debt portion:** S&P typically gives 50% equity credit to qualifying hybrids for investment-grade issuers.
   - Total hybrids: 3,393M
   - Debt portion (50%): 1,697M
   - (The other 50% = 1,697M gets equity credit)
   - But hybrids are likely already in equity, so we ADD the debt portion: +1,697M

4. **Operating lease adjustment:** Already in reported debt under IFRS 16.

5. **Cash netting:** S&P typically only nets "surplus cash" - readily available cash beyond operational needs.
   - Total cash: 15,570M
   - S&P might net a portion. For utilities, they're conservative. Let's net ~50% as surplus: ~7,785M. Actually, S&P often uses a more conservative approach. Given ENGIE's large trading operations and margin requirements, I'll net less, say ~5,000M.

6. **Asset retirement obligations / nuclear provisions:** ENGIE has significant nuclear decommissioning provisions. These are typically in provisions. However, for utilities, S&P may or may not add these. They're more of an operating liability. Let me not double-count with the pension estimate.

Let me refine the pension estimate. The OCI shows actuarial gains of 2,718M before tax on remeasurement of defined benefit plans. The prior year showed 1,742M. This suggests large pension obligations. Looking at noncurrent provisions of 24,663M, for ENGIE this typically includes:
- Nuclear provisions: ~10,000M
- Employee benefits: ~8,000M  
- Other: ~6,600M

S&P pension adjustment: ~8,000M (but need to check if partially funded). The assets backing pensions might offset. Let me use a net pension deficit of ~5,000M.

**Adjusted Debt = 40,591 + 5,000 (pension) + 1,697 (hybrid debt) - 5,000 (surplus cash) = 42,288M EUR**

Actually, let me reconsider. S&P's treatment for European utilities often includes:
- Reported net debt
- Pension adjustments
- Hybrid treatment
- Post-retirement benefits

Let me also consider that the long-term borrowings (28,083M) may already exclude the hybrid bonds since those are in equity (3,393M in "Deeply Subordinated Perpetual Notes" within equity).

So total financial debt = 28,083 + 12,508 = 40,591M

Adjusted Debt:
- Financial debt: 40,591M
- Add 50% of hybrids as debt: 1,697M (since hybrids are in equity, not in debt)
- Add pension deficit: ~5,000M
- Subtract surplus cash: ~5,000M (being conservative for a utility with trading ops)

**Adjusted Debt ≈ 42,288M EUR**

Let me also consider that S&P might be more generous or conservative on cash. For large European utilities with significant trading/hedging, margin calls can consume cash. Let me use a more moderate cash offset of ~3,000M.

**Adjusted Debt ≈ 40,591 + 1,697 + 5,000 - 3,000 = 44,288M EUR**

## Step 5: Calculate FFO / Adjusted Debt

**FFO / Adjusted Debt = 8,500 / 44,288 = 0.1919**

Let me double-check my estimates and refine:

Actually, looking at this more carefully, let me reconsider EBITDA. The "Cash Flows From Used In Operations Before Changes In Working Capital" of 12,415M is a strong indicator. This already excludes:
- Equity method income (added back 1,059M)  
- But adds dividends received (713M subtracted as adjustment)
- Removes non-cash MtM, impairments, etc.
- Adds back interest (3,003M) and tax (-83M → credit)

So: Pre-WC cash flow = 12,415M
This ≈ EBITDA - equity income + dividends - non-recurring items (net) - interest - taxes

EBITDA_cash ≈ 12,415 + interest(net cash) + taxes(cash)
= 12,415 + 628 + 1,504 = 14,547M

But this is inflated because it includes add-backs for impairments (2,774M+), MtM (3,661M), etc. that wouldn't be in a steady-state EBITDA.

For S&P, EBITDA should reflect recurring earnings power. Let me use the income-statement approach:

**Core EBITDA = 9,496M** (Current Operating Income + D&A)
**+ Dividends from equity investees: 713M**
**= ~10,209M**

For lease adjustment under S&P (adding back operating lease rent equivalent if needed beyond IFRS 16 treatment - typically for S&P they already accept IFRS 16 D&A + interest breakdown), the adjustment might be minimal or zero since IFRS 16 already capitalizes leases.

So **Adjusted EBITDA ≈ 10,200M EUR**

**FFO = 10,200 - 628 - 39 (hybrid interest) - 1,504 = 8,029M EUR**

**FFO / Adjusted Debt = 8,029 / 44,288 = 0.1813**

Hmm, let me reconsider the debt figure. I may be overestimating pension. For ENGIE, S&P reports often show adjusted debt around 33-37B range considering their net debt is typically reported around 25-27B.

ENGIE's reported net debt might be: 40,591 - 15,570 = 25,021M

S&P adjusted debt would add:
- 50% hybrid: +1,697M
- Pension: Let me use a smaller figure ~3,000M net
- Lease included already
- Cash offset: S&P typically doesn't subtract all cash for trading companies. Maybe -5,000M to -8,000M.

Let me try: 40,591 + 1,697 + 3,000 - 8,000 = 37,288M

FFO/Debt = 8,029 / 37,288 = 0.2153

Let me try another approach. Looking at ENGIE's typical S&P-adjusted metrics:

For the debt, a more careful estimate:
- Gross debt: 40,591M
- S&P typically subtracts readily available cash. For ENGIE with 15,570M cash, maybe 50%: ~7,500M
- Pension deficit (net): ~4,000M
- 50% hybrid: 1,697M  
- Operating lease (already in IFRS 16 debt): 0 additional

**Adjusted Debt = 40,591 - 7,500 + 4,000 + 1,697 = 38,788M**

**FFO = ~8,000M**

**FFO / Adjusted Debt = 8,000 / 38,788 = 0.2063**

Given the uncertainties, let me settle on reasonable middle-ground estimates:

- **Adjusted EBITDA: ~10,200M EUR**
- **FFO: ~8,000M EUR** 
- **Adjusted Debt: ~39,000M EUR**
- **FFO/Adjusted Debt: ~0.2050**

Let me finalize with more precise numbers:

FFO = 10,200 - 628 - 39 - 1,504 = 8,029M
Adjusted Debt = 40,591 + 1,697 + 4,000 - 7,500 = 38,788M

FFO/Adjusted Debt = 8,029 / 38,788 = 0.2070

<answer>0.2070</answer>