| Asset Retirement Obligation, Liabilities Incurred | 16.00M | 2025-01-01 → 2025-12-31 |
| Operating Lease, Liability, Current | 110.00M | as of 2025-12-31 |
| Asset Retirement Obligation, Revision of Estimate | -19.00M | 2025-01-01 → 2025-12-31 |
| Prepaid Expense and Other Assets, Current | 1.07B | as of 2025-12-31 |
| Share-based Payment Arrangement, Expense | 57.00M | 2025-01-01 → 2025-12-31 |
| Income Tax Expense (Benefit), Intraperiod Tax Allocation | -2.00M | 2025-01-01 → 2025-12-31 |
| Settlement Liabilities, Current | 5.00M | as of 2025-12-31 |
| Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity | 281.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 372.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 78.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 15.00M | 2025-01-01 → 2025-12-31 |
| Long-term Debt, Fair Value | 29.94B | as of 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | 52.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 14.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Amount | 569.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock | 1.36B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Gain | 1.80B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss | 47.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 4.00M | 2025-01-01 → 2025-12-31 |
| Guarantor Obligations, Maximum Exposure, Undiscounted | 120.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 10.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 344.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 292.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 299.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 945.00M | as of 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 8.00M | as of 2025-12-31 |
| Stock Issued During Period, Value, New Issues | 3.38B | 2025-01-01 → 2025-12-31 |
| Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided | 799.00M | as of 2025-12-31 |
| Operating Lease, Cost | 235.00M | 2025-01-01 → 2025-12-31 |
| Public Utilities, Inventory | 761.00M | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 1.25B | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year One | 112.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Two | 111.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Three | 114.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Four | 115.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | 37.00M | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Five | 117.00M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, after Year Five | 1.61B | as of 2025-12-31 |
| Finance Lease, Liability, Payment, Due | 2.18B | as of 2025-12-31 |
| Regulated Operating Revenue, Gas | 2.45B | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, Undiscounted Excess Amount | 882.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 152.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 130.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 120.00M | as of 2025-12-31 |
| Unregulated Operating Revenue | 57.00M | 2025-01-01 → 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 115.00M | as of 2025-12-31 |
| Regulated and Unregulated Operating Revenue | 14.67B | 2025-01-01 → 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 111.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 631.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 1.26B | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 4.00M | as of 2025-12-31 |
| Utilities Operating Expense, Depreciation and Amortization | 2.95B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 5.00M | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 0 | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 361.00M | as of 2025-12-31 |
| Long-term Debt, Gross | 32.33B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Purchase | -607.00M | 2025-01-01 → 2025-12-31 |
| Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | -2.00M | 2025-01-01 → 2025-12-31 |
| Fair Value Hedges, Net | 0 | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 501.00M | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 53.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 501.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 1.48B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 503.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 600.00M | as of 2025-12-31 |
| Tax Credit Carryforward, Amount | 1.47B | as of 2025-12-31 |
| Tax Credit Carryforward, Valuation Allowance | 10.00M | as of 2025-12-31 |
| Debt Issuance Costs, Noncurrent, Net | 270.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits | 43.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 2.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 5.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 3.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 0 | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 0 | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Income Tax Penalties Expense | 0 | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Interest on Income Taxes Expense | -2.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 43.00M | as of 2025-12-31 |
| Insurance Settlements Receivable | 353.00M | as of 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 45.00M | 2025-01-01 → 2025-12-31 |