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Income Taxes, Tax Liability and Uncertainties (Details)
$ in Millions
Dec. 31, 2020
USD ($)
state
country
city
Dec. 31, 2019
USD ($)
Income tax liability [Abstract]    
Net current liability for income tax $ 20.6 $ 4.4
Current receivable 221.5 235.3
Current payable 200.9 230.9
Liability for Uncertain Tax Positions, Noncurrent $ 163.6 $ 152.2
Income tax uncertainties [Abstract]    
Number of states where company or one of its subsidiaries files income tax returns | state 46  
Number of cities where company or one of its subsidiaries files income tax returns | city 25  
Number of other countries the company or one of its subsidiaries files income tax returns | country 78