Leases - Other information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 100.4	$ 96.0
Operating cash flows from finance leases	7.1	7.4
Financing cash flows from finance leases	34.8	29.4
Leased assets obtained in exchange for new operating lease obligations	123.6	56.3
Leased assets obtained in exchange for new finance lease obligations	$ 37.9	$ 59.7
Weighted average remaining lease term operating leases (years)	7 years 2 months 12 days	7 years 2 months 12 days
Weighted average remaining lease term finance leases (years)	4 years 6 months	5 years 2 months 12 days
Weighted average discount rate operating leases (percent)	6.60%	6.90%
Weighted average discount rate finance leases (percent)	4.90%	4.90%