| Metric | Q4 '21 | Q1 '22 | Q2 '22 | Q3 '22 | Q4 '22 | Q3 '23 | Q4 '25 | Q1 '26 |
|---|---|---|---|---|---|---|---|---|
| Long-term debt | $52.1B | $51.6B | $52.0B | $53.4B | — | $58.8B | — | $72.1B |
| Total Carrying Value of Debt | $52.1B | $51.6B | $52.0B | $53.4B | — | $58.8B | — | $72.1B |
| Long-Term Debt and Finance Lease Obligations | $50.1B | $50.6B | $51.2B | $50.4B | $50.7B | $56.0B | $65.6B | $67.1B |
| Long-Term Debt - Fair Value | $57.1B | $51.9B | $48.0B | $46.4B | — | $50.8B | — | $66.5B |
| Deferred Credits | $33.9B | $34.7B | $34.8B | $35.1B | $34.0B | $33.8B | $34.3B | $34.7B |
| Other non-current liabilities | $816.0M | $966.0M | $1.2B | $1.4B | $1.2B | $1.2B | $1.5B | $1.6B |
| Operating lease liabilities, non-current | $1.5B | $1.5B | $1.5B | $1.4B | $1.4B | $1.3B | $1.3B | $1.3B |
| Defined Benefit Pension Plan Liabilities (Non-Current) | $1.6B | $1.5B | $1.5B | $1.5B | $1.2B | $1.2B | $980.0M | $941.0M |
| Retirement and nonpension postretirement benefit obligations | $1.6B | $1.5B | $1.5B | $1.5B | $1.2B | $1.2B | $980.0M | $941.0M |
| Asset retirement obligations | $697.0M | $695.0M | $693.0M | $689.0M | $694.0M | $727.0M | $662.0M | $659.0M |
| Total liabilities | $95.0B | $95.7B | $97.5B | $98.3B | $100.4B | $103.0B | $116.9B | $436.0M |
| Contingent Consideration Liability (Non-Current) | — | — | — | — | — | — | — | $11.0M |
| Debt Maturity - 2027 | $2.3B | — | — | — | — | — | — | — |
| Debt - Unamortized Discount (Premium) and Issuance Costs, Net | $216.0M | — | — | — | — | — | — | — |
| Deferred tax liabilities | $17.5B | — | — | — | — | — | — | — |
| Operating Lease Liabilities (Total) | $1.8B | — | — | — | — | — | — | — |