| Finance Lease, Right-of-Use Asset, before Accumulated Amortization | 1.67B | as of 2025-12-31 |
| Finance Lease, Right-of-Use Asset, Accumulated Amortization | 380.00M | as of 2025-12-31 |
| Accounts Payable, Trade, Current | 1.46B | as of 2025-12-31 |
| Current Federal Tax Expense (Benefit) | -18.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 38.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 126.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 146.00M | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | -45.00M | 2025-01-01 → 2025-12-31 |
| Accounts Payable, Other, Current | 203.00M | as of 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 230.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 383.00M | 2025-01-01 → 2025-12-31 |
| Asset Retirement Obligation, Liabilities Incurred | 10.00M | 2025-01-01 → 2025-12-31 |
| Asset Retirement Obligation, Liabilities Settled | 58.00M | 2025-01-01 → 2025-12-31 |
| Operating Lease, Liability, Current | 90.00M | as of 2025-12-31 |
| Asset Retirement Obligation, Revision of Estimate | 1.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 2.00M | 2025-01-01 → 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 66.90B | as of 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization | 17.89B | as of 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization | 49.01B | as of 2025-12-31 |
| Share-based Payment Arrangement, Amount Capitalized | 8.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense | 56.00M | 2025-01-01 → 2025-12-31 |
| Accrual for Environmental Loss Contingencies, Gross | 59.00M | as of 2025-12-31 |
| Accrual for Environmental Loss Contingencies, Discount | 18.00M | as of 2025-12-31 |
| Energy Related Inventory, Natural Gas in Storage | 158.00M | as of 2025-12-31 |
| Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity | 174.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | 50.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 376.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 204.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, after Tax | 50.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 6.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount | 40.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 100.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 2.00M | 2025-01-01 → 2025-12-31 |
| Letters of Credit Outstanding, Amount | 202.00M | as of 2025-12-31 |
| Contract with Customer, Liability, Revenue Recognized | 105.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | -23.00M | 2025-01-01 → 2025-12-31 |
| Line of Credit Facility, Maximum Borrowing Capacity | 10.20B | as of 2025-12-31 |
| Line of Credit Facility, Remaining Borrowing Capacity | 7.63B | as of 2025-12-31 |
| SegmentExpenditureAdditionToLongLivedAssets | 10.61B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 3.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock, Stock | 52.00M | 2025-01-01 → 2025-12-31 |
| Noncontrolling Interest, Amount Represented by Preferred Stock | 20.00M | as of 2025-12-31 |
| Dividends, Common Stock | 1.68B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount | 43.00M | 2025-01-01 → 2025-12-31 |
| Environmental Costs Recognized, Capitalized in Period | 63.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 57.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 8.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | -304.00M | 2025-01-01 → 2025-12-31 |
| Other Noncontrolling Interests | 7.18B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | -266.00M | 2025-01-01 → 2025-12-31 |
| Loss Contingency Accrual | 38.00M | as of 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 1.80B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset | 83.00M | as of 2025-12-31 |
| Long-Lived Assets | 49.01B | as of 2025-12-31 |
| Deferred Credits and Other Liabilities | 2.81B | as of 2025-12-31 |
| Net Regulatory Assets | 376.00M | as of 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards | 935.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 41.00M | as of 2025-12-31 |
| Stock Issued During Period, Value, New Issues | 84.00M | 2025-01-01 → 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | 0 | 2025-01-01 → 2025-12-31 |
| Stock Repurchased During Period, Value | 58.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, General Business | 1.56B | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | 41.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value | 36.00M | as of 2025-12-31 |
| Retained Earnings, Undistributed Earnings from Equity Method Investees | 3.40B | as of 2025-12-31 |
| Operating Lease, Cost | 164.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other | 212.00M | as of 2025-12-31 |
| Short-term Lease, Cost | 8.00M | 2025-01-01 → 2025-12-31 |
| Variable Lease, Cost | 450.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 867.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 0 | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 47.00M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 386.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves | 0 | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year One | 229.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Two | 227.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Three | 220.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Four | 212.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Five | 202.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, after Year Five | 1.56B | as of 2025-12-31 |
| Finance Lease, Liability, Payment, Due | 2.65B | as of 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Writeoff | 193.00M | 2025-01-01 → 2025-12-31 |
| Regulated Operating Revenue, Electric, Non-Nuclear | 4.55B | 2025-01-01 → 2025-12-31 |
| Regulated Operating Revenue, Gas | 7.32B | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, Undiscounted Excess Amount | 1.36B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 147.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 143.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 143.00M | as of 2025-12-31 |
| Unregulated Operating Revenue | 1.83B | 2025-01-01 → 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 147.00M | as of 2025-12-31 |
| Regulated and Unregulated Operating Revenue | 13.70B | 2025-01-01 → 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 147.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 1.08B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 1.80B | as of 2025-12-31 |
| Deferred Tax Assets, Other | 173.00M | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 3.25B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 233.00M | as of 2025-12-31 |
| Deferred Tax Assets, Net of Valuation Allowance | 3.01B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 539.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Gross | 9.13B | as of 2025-12-31 |
| Long-term Debt, Gross | 11.96B | as of 2025-12-31 |
| Deferred Tax Liabilities, Property, Plant and Equipment | 7.69B | as of 2025-12-31 |
| Assets, Fair Value Disclosure | 1.35B | as of 2025-12-31 |
| Financial and Nonfinancial Liabilities, Fair Value Disclosure | 135.00M | as of 2025-12-31 |
| Operating Lease, Lease Income, Lease Payments | 362.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Other | 446.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Net | 6.12B | as of 2025-12-31 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | -2.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 1.80B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 1.45B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 1.60B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 500.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 1.45B | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 23.06B | as of 2025-12-31 |
| Operating Lease, Variable Lease Income | 24.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 601.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 19.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 28.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 81.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions | 0 | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 19.00M | 2025-01-01 → 2025-12-31 |
| Decrease in Unrecognized Tax Benefits is Reasonably Possible | 150.00M | as of 2025-12-31 |
| Income Taxes Receivable, Current | 71.00M | as of 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Domestic | 1.35B | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 436.00M | 2025-01-01 → 2025-12-31 |
| Other Receivables, Net, Current | 0 | as of 2025-12-31 |
| Interest Costs Capitalized | 801.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 10.00M | as of 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 2.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 4.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) | 0 | 2025-01-01 → 2025-12-31 |
| Derivative, Net Liability Position, Aggregate Fair Value | 190.00M | as of 2025-12-31 |
| Additional Collateral, Aggregate Fair Value | 189.00M | as of 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 64.00M | 2025-01-01 → 2025-12-31 |