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Leases - Supplemental Cash Flow and Other Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Operating lease cost $ 65.9 $ 66.9 $ 64.6
Operating cash flows used for operating leases 66.7    
Right-of-use assets obtained in exchange for operating lease obligations $ 60.4    
Weighted average remaining lease term - operating leases 7 years    
Weighted average discount rate 3.00%