Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]
Capital leases related to acquisitions	$ 7.8
Capital lease and deferred purchase price related to acquisitions		62.1
Property acquired under capital leases	10.2	20.1	24.2
Accrued purchases of property and equipment	28.1	23.6	17.3
Interest payments	136.0	119.6	103.6
Income tax payments, net of income tax refunds	$ 200.3	$ 147.0	$ 121.1