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Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Statutory rate 21.00% 21.00% 21.00%
Tax that would result from use of the federal statutory rate $ 204.5 $ 162.4 $ 151.1
State and local income tax, net of federal effect 28.7 19.3 22.1
Varying tax rates of foreign affiliates 2.8 1.8 3.3
Valuation Allowances 2.9 0.9 1.0
Stock Options Exercised (29.4) (16.1) (22.1)
Worthless Stock Deduction - Investment in Brazil (0.0) (12.0) (0.0)
Reserve for Uncertain Tax Position - Investment in Brazil (10.6) 12.0 0.0
Other (11.0) (10.5) (4.5)
Recorded tax expense $ 187.9 $ 157.8 $ 150.9
Effective tax rate 19.30% 20.40% 21.00%