Leases (Supplemental Cash Flow and Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 64.6	$ 58.0	$ 56.6
Operating cash flows used for operating leases	64.4	59.7
Right-of-use assets obtained in exchange for operating lease obligations	$ 41.6	$ 58.1
Weighted average remaining lease term - operating leases (years)	6 years
Weighted average discount rate (%)	2.70%