Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Cash paid for interest			$ 78.8	$ 74.5	$ 78.1
Cash paid for income taxes, net of refunds	[1]		244.1	231.9	103.9
Tax refunds		$ 37.4	$ 26.6	$ 13.0	$ 21.3

[1] Refunds of $26.6, $13.0 and $21.3 were received for the years ended December 31, 2016, 2015 and 2014, respectively.