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Leases (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Rent expense, net of sublease income   $ 191.8 $ 166.5
Sublease rental income $ 0.5 0.6 0.6
Assets acquired under capital leases   $ 1.1 $ 1.3