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Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Noncash Investing and Financing Items [Abstract]
Property acquired under capital leases	$ 19.1	$ 5.0
Interest payments	55.4	53.9
Income tax payments, net of income tax refunds	$ 90.2	$ 82.8

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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