Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities		$ 192.7	$ 88.7	$ 82.3
Cash paid for income taxes, net of refunds	[1]	150.2	207.9	228.4
Tax refunds		$ 92.6	$ 24.3	$ 31.9

[1] Refunds of $92.6, $24.3 and $31.9 were received for the years ended December 31, 2019, 2018 and 2017, respectively.