| Current Federal Tax Expense (Benefit) | -17.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 49.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 16.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 48.00M | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 221.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 11.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | -10.00M | 2025-01-01 → 2025-12-31 |
| Asset Retirement Obligation, Liabilities Incurred | 47.00M | 2025-01-01 → 2025-12-31 |
| Operating Lease, Liability, Current | 35.00M | as of 2025-12-31 |
| Asset Retirement Obligation, Revision of Estimate | -20.00M | 2025-01-01 → 2025-12-31 |
| Other Inventories, Spare Parts, Gross | 89.00M | as of 2025-12-31 |
| Prepaid Expense and Other Assets, Current | 1.07B | as of 2025-12-31 |
| Other Accrued Liabilities, Current | 808.00M | as of 2025-12-31 |
| Equity Method Investment, Other than Temporary Impairment | 39.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Preferred Stock, Cash | 67.00M | 2025-01-01 → 2025-12-31 |
| Energy Related Inventory, Petroleum | 11.00M | as of 2025-12-31 |
| Energy Related Inventory, Natural Gas in Storage | 177.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 238.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 46.00M | 2025-01-01 → 2025-12-31 |
| Energy Related Inventory, Coal | 111.00M | as of 2025-12-31 |
| Contract with Customer, Liability, Revenue Recognized | 698.00M | 2025-01-01 → 2025-12-31 |
| SegmentExpenditureAdditionToLongLivedAssets | 1.15B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | -1.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock, Cash | 350.00M | 2025-01-01 → 2025-12-31 |
| Public Utilities, Property, Plant and Equipment, Plant in Service | 5.41B | as of 2025-12-31 |
| Public Utilities, Property, Plant and Equipment, Accumulated Depreciation | 1.77B | as of 2025-12-31 |
| Public Utilities, Property, Plant and Equipment, Net | 3.63B | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 560.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 423.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 270.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 204.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Five | 173.00M | as of 2025-12-31 |
| Treasury Stock, Value, Acquired, Cost Method | 1.31B | 2025-01-01 → 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 797.00M | 2025-01-01 → 2025-12-31 |
| Capitalized Contract Cost, Amortization | 510.00M | 2025-01-01 → 2025-12-31 |
| ShareRepurchaseProgramExciseTax | 9.00M | 2025-01-01 → 2025-12-31 |
| ShareRepurchaseProgramExciseTaxPayable | 11.00M | as of 2025-12-31 |
| Share-based Payment Arrangement, Decrease for Tax Withholding Obligation | 92.00M | 2025-01-01 → 2025-12-31 |
| Costs Incurred, Asset Retirement Obligation Incurred | 18.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 1.40B | as of 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 107.00M | as of 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 326.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards | 288.00M | as of 2025-12-31 |
| Goodwill, Foreign Currency Translation Gain (Loss) | 6.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Capital Loss Carryforwards | 1.00M | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, Year One | 2.79B | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two | 2.51B | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three | 1.60B | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four | 1.02B | as of 2025-12-31 |
| Retained Earnings, Undistributed Earnings from Equity Method Investees | 9.00M | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, Year Five | 739.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 44.00M | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five | 1.52B | as of 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation | 10.19B | as of 2025-12-31 |
| Operating Lease, Cost | 63.00M | 2025-01-01 → 2025-12-31 |
| Short-term Lease, Cost | 46.00M | 2025-01-01 → 2025-12-31 |
| Variable Lease, Cost | 138.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 256.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 34.00M | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 19.00M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 32.00M | 2025-01-01 → 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Writeoff | 343.00M | 2025-01-01 → 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Recovery | 46.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Property, Plant and Equipment | 101.00M | as of 2025-12-31 |
| Deferred Tax Assets, Inventory | 9.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 50.00M | as of 2025-12-31 |
| Deferred Tax Assets, Deferred Income | 323.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 46.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 36.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 25.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 22.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 104.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 283.00M | as of 2025-12-31 |
| Deferred Tax Assets, Other | 45.00M | as of 2025-12-31 |
| Deferred Tax Asset, Interest Carryforward | 26.00M | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 2.92B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 150.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 104.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Gross | 937.00M | as of 2025-12-31 |
| Deferred Tax Assets, Net | 1.83B | as of 2025-12-31 |
| Assets, Fair Value Disclosure | 3.17B | as of 2025-12-31 |
| Deferred Tax Liabilities, Derivatives | 85.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Investment in Noncontrolled Affiliates | 84.00M | as of 2025-12-31 |
| Financial and Nonfinancial Liabilities, Fair Value Disclosure | 3.22B | as of 2025-12-31 |
| Deferred Tax Liabilities, Deferred Expense, Other Capitalized Costs | 345.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Goodwill | 71.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Intangible Assets | 338.00M | as of 2025-12-31 |
| Finite-lived Intangible Assets Acquired | 32.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 31.00M | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 65.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 930.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 907.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 2.56B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 663.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 11.50B | as of 2025-12-31 |
| Debt Instrument, Unamortized Discount (Premium), Net | 11.00M | as of 2025-12-31 |
| Debt Issuance Costs, Net | 146.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits | 53.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 2.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 6.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Income Tax Penalties Expense | 1.00M | 2025-01-01 → 2025-12-31 |
| Unbilled Contracts Receivable | 1.75B | as of 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Domestic | 1.09B | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 47.00M | 2025-01-01 → 2025-12-31 |
| Derivative, Net Liability Position, Aggregate Fair Value | 207.00M | as of 2025-12-31 |
| Additional Collateral, Aggregate Fair Value | 55.00M | as of 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 48.00M | 2025-01-01 → 2025-12-31 |