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Income Taxes - Reconciliation of income taxes at the statutory rate to the provision for income taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Earnings before income taxes (“EBT”) | $ 1,124 | $ 1,073 | $ 1,123
Income taxes at statutory rate | 236 | 225 | 236
Effect of employee stock ownership plan dividend paid deduction | (5) | (5) | (8)
Effect of tax exempt interest | (5) | (5) | (6)
Effect of stock-based compensation | (3) | (2) | (5)
Effect of change in valuation allowance (excluding change in tax rate) | (3) | (2) | (9)
Effect of dividends received deduction | (1) | (2) | (2)
Effect of nondeductible expenses | 7 | 11 | 8
Effect of adjustment related to the sale of a subsidiary | 4 | 0 | 0
Effect of adjustments to prior year taxes | 1 | (5) | (3)
Effect of foreign operations | 2 | 6 | 7
Effect of other income tax reconciliation | 4 | 0 | 7
Provision for income taxes as shown in the Statement of Earnings | $ 237 | $ 221 | $ 225
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Income taxes at statutory rate as a percentage of EBT | 21.00% | 21.00% | 21.00%
Effect of employee stock ownership plan dividend paid deduction as a percentage of EBT | (1.00%) | (1.00%) | (1.00%)
Effect of tax exempt interest as a percentage of EBT | (1.00%) | (1.00%) | (1.00%)
Effect of stock-based compensation as a percentage of EBT | 0.00% | 0.00% | 0.00%
Effect of change in valuation allowance (excluding change in tax rate) as a percentage of EBT | 0.00% | 0.00% | (1.00%)
Effect of dividend received deduction as a percentage of EBT | 0.00% | 0.00% | 0.00%
Effect of nondeductible expenses as a percentage of EBT | 1.00% | 1.00% | 1.00%
Effect of adjustment related to the sale of a subsidiary as a percentage of EBT | 1.00% | 0.00% | 0.00%
Effect of prior year income taxes as a percentage of EBT | 0.00% | 0.00% | 0.00%
Effect of foreign operations as a percentage of EBT | 0.00% | 1.00% | 1.00%
Effect of other income tax reconciliation as a percentage of EBT | 0.00% | 0.00% | 0.00%
Provision for income taxes as shown in the Statement of Earnings as a percentage of EBT | 21.00% | 21.00% | 20.00%

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