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Income Taxes, Income Tax Expense and Tax Rate Reconciliation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Increase (reduction) in income taxes from: |  |  |
Computed expected tax expense | $ 52.9 | $ 208.7 | $ 256.9
State and local income taxes, net of federal income tax benefit | (17.1) | 26.8 | 39.7
Nondeductible expenses | 7.1 | 13.9 | 17.6
International earnings taxed at various rates | (58.4) | (34.7) | (22.6)
Effective Income Tax Rate Reconciliation, U.S. capital loss carryover | 0.0 | 0.0 | (35.2)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 41.3 | (4.8) | 34.2
Other, net | (0.1) | (9.1) | (26.3)
Total provision for income taxes | $ 25.7 | $ 200.8 | $ 264.3
Increase (reduction) in income taxes from: |  |  |
U.S. federal income tax rate | 21.00% | 21.00% | 21.00%
State and local income taxes, net of federal income tax benefit | (6.80%) | 2.70% | 3.20%
Nondeductible expenses | 2.90% | 1.40% | 1.40%
International earnings taxed at various rates | (23.20%) | (3.50%) | (1.80%)
Effective Income Tax Rate Reconciliation, U.S. capital loss carryover, Percent | 0.00% | 0.00% | (2.90%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent | 16.40% | (0.50%) | 2.80%
Other, net | (0.10%) | (0.90%) | (2.10%)
Total | 10.20% | 20.20% | 21.60%

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