Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill, Gross Carrying Value	$ 9,502.6	$ 9,424.3
Goodwill, Accumulated Amortization	586.6	580.1
Goodwill, Net Carrying Value	8,916.0	8,844.2
Intangible assets:, Gross Carrying Value	938.3	954.1
Intangible assets:, Accumulated Amortization	552.3	498.0
Intangible assets:, Net Carrying Value	386.0	456.1
Goodwill [Roll Forward]
Goodwill, Balance January 1	8,844.2	8,456.3
Goodwill, Acquisitions	69.9	301.1
Goodwill, Dispositions	(8.5)	(2.7)
Goodwill, Foreign currency translation	10.4	89.5
Goodwill, Balance December 31	8,916.0	8,844.2
Goodwill, impairment losses	0
Goodwill, accumulated impairment losses	0
Goodwill, acquisitions of noncontrolling interests	12.2	25.6
Purchased and internally developed software
Intangible assets:, Gross Carrying Value	283.2	289.6
Intangible assets:, Accumulated Amortization	217.4	222.1
Intangible assets:, Net Carrying Value	65.8	67.5
Customer related and other
Intangible assets:, Gross Carrying Value	655.1	664.5
Intangible assets:, Accumulated Amortization	334.9	275.9
Intangible assets:, Net Carrying Value	$ 320.2	$ 388.6