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Income Taxes, Income Tax Expense and Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Increase (reduction) in income taxes from:      
Computed expected tax expense $ 142.6 $ 52.9 $ 208.7
State and local income taxes, net of federal income tax benefit 5.4 (17.1) 26.8
Nondeductible expenses 13.8 7.1 13.9
International earnings taxed at various rates (32.3) (58.4) (34.7)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 12.7 41.3 (4.8)
Other, net (9.7) (0.1) (9.1)
Total provision for income taxes $ 132.5 $ 25.7 $ 200.8
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 0.80% (6.80%) 2.70%
Nondeductible expenses 2.00% 2.90% 1.40%
International earnings taxed at various rates (4.80%) (23.20%) (3.50%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent 1.90% 16.40% (0.50%)
Other, net (1.40%) (0.10%) (0.90%)
Total 19.50% 10.20% 20.20%