Step 1 — Relevant industry

Veolia Environnement is a global environmental services group active mainly in water, waste, and energy services. From the provided methodologies, the closest fit is Regulated Utilities, especially due to its water and utility-like concession activities. However, Veolia is not a pure regulated utility; it has substantial contracted/concession and environmental services exposure. Therefore, I apply the baseline corporate/S&P-style formulas, with utility-style attention to leases, concession liabilities, hybrid capital, and cash netting.

Step 2 — Estimate Adjusted EBITDA

A reported EBITDA line is not directly provided, so reconstruct EBITDA from operating income before equity-accounted entities plus operating depreciation/amortization/provisions/impairments.

For 2022:

- Operating income before share of net income/loss of equity-accounted entities = EUR 2,206.3m
- Operating depreciation, amortization, provisions and impairment losses = EUR 3,178.6m

Reconstructed EBITDA:

\[
EBITDA = 2{,}206.3 + 3{,}178.6 = 5{,}384.9\text{m}
\]

Lease adjustment: S&P typically treats operating leases as debt-like and adds back lease interest/depreciation where necessary. Since IFRS 16 already capitalizes leases, the income statement EBITDA already excludes lease depreciation and lease interest. To avoid double counting, I do not add an additional lease adjustment.

Nonrecurring gains/losses: The facts include gains/losses on disposal of operating assets and financial assets, but these are already within reconciliation items and not clearly included in reconstructed EBITDA in a way that can be reliably normalized. To keep the estimate consistent and avoid over-adjustment, no explicit nonrecurring adjustment is made.

Estimated Adjusted EBITDA:

\[
Adjusted\ EBITDA \approx 5{,}384.9\text{m}
\]

Step 3 — Estimate FFO

Baseline formula:

\[
FFO = Adjusted\ EBITDA - cash\ interest - cash\ taxes
\]

Given:

- Interest paid = EUR 637.7m
- Interest on operating assets = EUR 78.5m
- Interest on lease = EUR 52.5m
- Income taxes paid = EUR 557.4m

For cash interest, use total interest paid including lease interest, but netting interest on operating assets as interest received/offset:

\[
Cash\ interest = 637.7 - 78.5 + 52.5 = 611.7\text{m}
\]

Then:

\[
FFO = 5{,}384.9 - 611.7 - 557.4 = 4{,}215.8\text{m}
\]

Estimated FFO:

\[
FFO \approx 4{,}215.8\text{m}
\]

Step 4 — Estimate Adjusted Debt

Reported financial debt-like items at 2022 year-end / 2023-01-01:

- Noncurrent financial liabilities excluding concession liabilities = EUR 19,692.1m
- Current financial liabilities excluding concession liabilities = EUR 6,521.4m
- Noncurrent lease liabilities = EUR 1,656.2m
- Current lease liabilities = EUR 496.5m
- Bank overdrafts and other cash position items = EUR 213.6m
- Noncurrent concession liabilities = EUR 1,680.5m
- Current concession liabilities = EUR 243.2m

Gross debt-like liabilities:

\[
19{,}692.1 + 6{,}521.4 + 1{,}656.2 + 496.5 + 213.6 + 1{,}680.5 + 243.2 = 30{,}503.5\text{m}
\]

Hybrid debt adjustment:

Deeply subordinated securities at year-end:

- Hybrid/deeply subordinated securities = EUR 3,496.3m

S&P often gives intermediate equity credit to hybrids, commonly 50% debt / 50% equity if eligible. Since these securities are included in equity, add 50% as debt-like:

\[
Hybrid\ debt\ portion = 50\% \times 3{,}496.3 = 1{,}748.15\text{m}
\]

Cash netting:

- Cash and cash equivalents = EUR 9,012.2m

S&P does not always net all cash; it typically nets surplus/accessible cash, often subject to haircuts. For a large utility-like corporate, I estimate eligible cash at 75% of reported cash:

\[
Eligible\ cash = 75\% \times 9{,}012.2 = 6{,}759.15\text{m}
\]

Adjusted debt:

\[
Adjusted\ Debt = 30{,}503.5 + 1{,}748.15 - 6{,}759.15 = 25{,}492.5\text{m}
\]

Step 5 — FFO / Adjusted Debt

\[
FFO / Adjusted\ Debt = 4{,}215.8 / 25{,}492.5 = 0.165374
\]

Rounded to four decimals:

<answer>0.1654</answer>