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Income Taxes - Effective Income Tax Rate In Percentage (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Reconciliation between the U.S. corporate income tax rate and the effective income tax rate |  |  |  |
Income (loss) before income taxes | $ 503.1 | $ 443.9 | $ 532.0 | $ 1,071.0
Expected tax at the U.S. statutory rate | 105.6 | 93.2 | 111.7 | 224.9
Tax credits | (22.6) | (18.7) | (52.2) | (34.9)
Dividends received deduction | (19.8) | (18.3) | (38.0) | (37.7)
Interest exclusion from taxable income | (5.7) | (6.1) | (10.9) | (11.9)
Impact of equity method presentation | (5.1) | (6.4) | (10.8) | (11.1)
Impact of noncontrolling interest presentation | (5.7) | (0.8) | (8.8) | (0.7)
Changes in unrecognized tax benefits - Tax Cuts and Jobs Act of 2017 rate change | (5.4) |  | (5.4) |
Low income housing tax credit amortization | 12.2 | 10.4 | 24.4 | 21.0
Foreign country statutory rate differential | 3.4 | (0.8) | 13.0 | (3.2)
State income taxes | 9.8 | 17.4 | 11.7 | 22.1
Valuation allowance | 0.7 | 13.9 | 1.3 | 15.4
Other | 2.2 | 3.3 | (0.4) | (1.7)
Income taxes (benefits) | $ 69.6 | $ 87.1 | $ 35.6 | $ 182.2
Effective income tax rate (as a percent) | 14.00% | 20.00% | 7.00% | 17.00%

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