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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Provision for income taxes at United States federal statutory rate(1) $ 232.5 $ 198.3 $ 118.0
State and local income taxes, net of federal income tax effects(1) (2.9) 2.2 (3.5)
Taxes on foreign income which differ from the United States statutory rate 43.6 16.2 13.9
Tax effect of permanent differences (0.2) (6.4) 13.4
Change in valuation allowance 0.7 (130.8) 16.3
Change in tax contingency reserves 25.5 36.6 37.2
Research and development tax credits (6.9) (7.4) (9.0)
Other 4.3 (0.3) 1.4
Income tax provision $ 296.6 $ 108.4 $ 187.7