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Accounting Policies - Summary of Receivables Sold (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Accounting Policies [Abstract]    
Gross receivables sold/cash proceeds received $ 568.8 $ 293.9
Collections reinvested under revolving agreement 486.8 193.9
Net cash proceeds received $ 82.0 $ 100.0