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Income Taxes - Reconciliation of Expected Income Tax Expense at Federal Statutory Rate to the Applicable Income Tax Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Income Tax Disclosure [Abstract] |  |  |  |  |
Tax at statutory rate | $ 532 |  | $ 435 | $ 1,467 | $ 1,218
State income tax, at statutory rates, net of federal tax benefit | 119 |  | 106 | 330 | 289
Tax credits and benefits, net of related expenses | (115) |  | (140) | (381) | (284)
Revaluation of tax related assets and liabilities | 0 | $ 72 | 0 | 72 | 0
Exam resolutions | (1) |  | (1) | (1) | (98)
Tax-exempt income | (39) |  | (38) | (112) | (105)
Other items | 28 |  | (12) | 64 | 122
Total income tax provision | $ 524 |  | $ 350 | $ 1,439 | $ 1,142

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