| Current Federal Tax Expense (Benefit) | 764.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 136.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 14.00M | 2025-01-01 → 2025-12-31 |
| Energy Marketing Accounts Payable | 1.07B | as of 2025-12-31 |
| Cash and Cash Equivalents, Fair Value Disclosure | 42.00M | as of 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 238.00M | 2025-01-01 → 2025-12-31 |
| Increase (Decrease) Cash Collateral from Counterparties | -773.00M | 2025-01-01 → 2025-12-31 |
| Accounts Payable, Other, Current | 20.00M | as of 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 50.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 0 | 2025-01-01 → 2025-12-31 |
| Operating Lease, Liability, Current | 72.00M | as of 2025-12-31 |
| Other Accrued Liabilities, Current | 315.00M | as of 2025-12-31 |
| Federal Income Tax Expense (Benefit), Continuing Operations | 3.46B | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense | 385.00M | 2025-01-01 → 2025-12-31 |
| Foreign Income Tax Expense (Benefit), Continuing Operations | 53.00M | 2025-01-01 → 2025-12-31 |
| DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement | 1.40B | as of 2025-12-31 |
| Deferred Compensation Plan Assets | 112.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 737.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 147.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, after Tax | 286.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 99.00M | 2025-01-01 → 2025-12-31 |
| Financial Liabilities Fair Value Disclosure | 1.00B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 8.00M | 2025-01-01 → 2025-12-31 |
| Inventory, Finished Goods, Net of Reserves | 251.00M | as of 2025-12-31 |
| Letters of Credit Outstanding, Amount | 2.08B | as of 2025-12-31 |
| Inventory, Raw Materials and Supplies, Net of Reserves | 1.49B | as of 2025-12-31 |
| Equity Securities, FV-NI, Unrealized Gain (Loss) | -304.00M | 2025-01-01 → 2025-12-31 |
| Other Labor-related Expenses | 9.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount | -44.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | 38.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities, FV-NI, Gain (Loss) | -279.00M | 2025-01-01 → 2025-12-31 |
| Line of Credit Facility, Maximum Borrowing Capacity | 9.46B | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Amount | 109.00M | as of 2025-12-31 |
| Line of Credit Facility, Remaining Borrowing Capacity | 0 | as of 2025-12-31 |
| Line of Credit Facility, Capacity Available for Trade Purchases | 7.36B | as of 2025-12-31 |
| Deferred Costs and Other Assets | 22.66B | as of 2025-12-31 |
| Noncontrolling Interest, Period Increase (Decrease) | -41.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount | 2.00M | 2025-01-01 → 2025-12-31 |
| Public Utilities, Property, Plant and Equipment, Net | 22.47B | as of 2025-12-31 |
| Dividends, Common Stock | 486.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 350.00M | 2025-01-01 → 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 41.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 33.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 28.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 20.00M | as of 2025-12-31 |
| Revenue, Remaining Performance Obligation, Amount | 1.05B | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Five | 16.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, after Year Five | 63.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 12.39B | as of 2025-12-31 |
| DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement | 881.00M | as of 2025-12-31 |
| Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 13.23B | as of 2025-12-31 |
| Defined Benefit Plan, Service Cost | 102.00M | 2025-01-01 → 2025-12-31 |
| Defined Benefit Plan, Interest Cost | 486.00M | 2025-01-01 → 2025-12-31 |
| Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 522.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Notional Amount | 810.00M | as of 2025-12-31 |
| Derivative Asset, Notional Amount | 810.00M | as of 2025-12-31 |
| Deferred Income Taxes and Other Tax Liabilities, Noncurrent | 3.54B | as of 2025-12-31 |
| Defined Benefit Plan, Amortization of Gain (Loss) | -95.00M | 2025-01-01 → 2025-12-31 |
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | -5.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset | 12.35B | as of 2025-12-31 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 157.00M | 2025-01-01 → 2025-12-31 |
| Deferred Credits and Other Liabilities | 27.20B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 753.00M | as of 2025-12-31 |
| Stock Repurchased During Period, Value | 404.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, General Business | 23.00M | as of 2025-12-31 |
| EquityClassifiedWrittenCallOptionModificationEquityIssuanceIncreaseDecreaseInEquityAmount | 6.00M | 2025-01-01 → 2025-12-31 |
| Goodwill, Transfers | 0 | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 104.00M | 2025-01-01 → 2025-12-31 |
| Variable Lease, Cost | 109.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 213.00M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 2.00M | 2025-01-01 → 2025-12-31 |
| Decommissioning Fund Investments, Fair Value | 19.40B | as of 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Writeoff | 79.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Derivative Instruments | 1.09B | as of 2025-12-31 |
| Accounts Receivable, Sale | 4.20B | 2025-01-01 → 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 104.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 104.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 105.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 103.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 63.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 159.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 638.00M | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Cash | 1.40B | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Securities | 718.00M | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 554.00M | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Cash | 47.00M | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Securities | 115.00M | as of 2025-12-31 |
| Utilities Operating Expense, Taxes | 163.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 11.00B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 133.00M | as of 2025-12-31 |
| Long-term Debt, Gross | 7.40B | as of 2025-12-31 |
| Deferred Tax Liabilities, Property, Plant and Equipment | 3.32B | as of 2025-12-31 |
| Deferred Tax Liabilities, Other Finite-Lived Assets | 35.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Investments | 283.00M | as of 2025-12-31 |
| Fair Value, Net Asset (Liability) | 20.03B | as of 2025-12-31 |
| Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | 248.00M | as of 2025-12-31 |
| Operating Lease, Lease Income, Lease Payments | 51.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Other | 160.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Net | 3.23B | as of 2025-12-31 |
| Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation | 7.44B | as of 2025-12-31 |
| Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets | 6.50B | as of 2025-12-31 |
| Other Commitment, to be Paid, Year One | 2.39B | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Two | 190.00M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Three | 336.00M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Four | 0 | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Five | 1.00M | as of 2025-12-31 |
| Other Commitment, to be Paid, after Year Five | 3.00M | as of 2025-12-31 |
| Other Commitment | 2.92B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 92.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 666.00M | as of 2025-12-31 |
| Defined Contribution Plan, Employer Discretionary Contribution Amount | 126.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 828.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 157.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 99.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 5.56B | as of 2025-12-31 |
| Liability for Asbestos and Environmental Claims, Gross | 120.00M | as of 2025-12-31 |
| Debt Instrument, Unamortized Discount (Premium), Net | 1.00M | as of 2025-12-31 |
| Operating Lease, Variable Lease Income | 231.00M | 2025-01-01 → 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year One | 50.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Two | 50.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Three | 50.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Four | 48.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Five | 9.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, after Year Five | 29.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payments to be Received | 236.00M | as of 2025-12-31 |
| Unbilled Contracts Receivable | 1.30B | as of 2025-12-31 |
| Pension and Other Postretirement Benefits Cost (Reversal of Cost) | 152.00M | 2025-01-01 → 2025-12-31 |
| Nontrade Receivables, Noncurrent | 28.00M | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability | 1.31B | as of 2025-12-31 |