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Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Capital lease and deferred purchase price related to acquisitions	$ 62.1
Property acquired under capital leases	20.1	24.2	0
Interest payments	119.6	103.6	86.6
Income tax payments, net of income tax refunds	$ 147.0	$ 121.1	$ 84.2

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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