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Income Tax Expense (Components of Tax Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax | $ 589 | $ 1,049 | $ 430
Federal | 18 | 152 | 16
State | (1) | 37 | 7
Current Foreign Tax Expense (Benefit) | 7 | 0 | 0
Total current income tax expense | 24 | 189 | 23
Federal | 22 | (19) | 9
State | (8) | 5 | 4
Deferred Foreign Income Tax Expense (Benefit) | 24 | 0 | 0
Total deferred tax expense (benefit) | 38 | (14) | 13
Income tax expense | 62 | 175 | 36
Cash paid for federal tax credits purchased from non-governmental third parties | 41 | 47 | 0
Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 3 | 135 | 29
Federal | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | (68) | 105 | 21
PENNSYLVANIA | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 2 | 7 | 2
Other states | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 3 | 11 | 3
CANADA | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 62 | 0 | 0
NEW JERSEY | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 2 | 12 | 3
Other Foreign | Excluding federal tax credits purchased from non-governmental third parties |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income Taxes Paid, Net | 2 | 0 | 0
UNITED STATES |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax | 397 | 1,040 | 430
Non-US |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax | $ 192 | $ 9 | $ 0

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