Goodwill and Other Intangible Assets (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Amortizable intangible assets:
Gross Carrying Amount	$ 768,500,000	$ 747,300,000
Accumulated Amortization	(412,500,000)	(393,300,000)
Net Carrying Value	356,000,000	354,000,000
Indefinite-lived intangible assets:
Gross Carrying Amount	2,208,200,000	2,208,200,000
Total Other intangible assets
Gross Carrying Amount	2,976,700,000	2,955,500,000
Accumulated Amortization	(412,500,000)	(393,300,000)
Net Carrying Value	2,564,222,000	2,562,234,000
Amortization of other intangible assets	19,200,000	16,800,000
Expected amortization expense for the remainder of 2012	57,700,000
Expected Amortization expense in 2013	75,300,000
Expected Amortization expense in 2014	71,400,000
Expected Amortization expense in 2015	69,100,000
Expected Amortization expense in 2016	20,600,000
Expected Amortization expense in 2017	8,600,000
Customer-related
Amortizable intangible assets:
Gross Carrying Amount	689,700,000	672,600,000
Accumulated Amortization	(382,200,000)	(365,500,000)
Net Carrying Value	307,500,000	307,100,000
Total Other intangible assets
Accumulated Amortization	(382,200,000)	(365,500,000)
Other amortizable intangible assets
Amortizable intangible assets:
Gross Carrying Amount	78,800,000	74,700,000
Accumulated Amortization	(30,300,000)	(27,800,000)
Net Carrying Value	48,500,000	46,900,000
Total Other intangible assets
Accumulated Amortization	(30,300,000)	(27,800,000)
Trade name
Indefinite-lived intangible assets:
Gross Carrying Amount	2,190,000,000	2,190,000,000
Other indefinite-lived intangible assets
Indefinite-lived intangible assets:
Gross Carrying Amount	$ 18,200,000	$ 18,200,000