Goodwill and Other Intangible Assets - Changes in Carrying Value of Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Beginning balance, Gross Goodwill	$ 9,433.7	$ 9,438.6
Beginning balance, Accumulated Impairment	(6,273.4)	(6,078.2)
Beginning balance, Net Carrying Value	3,160.3	3,360.4
Additions	15.1	14.3
Impairments	(104.3)	(195.2)	(3.0)
Contribution of ThistleDown to ROC venture	0	(20.1)
Disposals	(14.9)	0
Other	7.1	0.9
Ending balance, Gross Goodwill	9,441.0	9,433.7	9,438.6
Ending balance, Accumulated Impairment	(6,377.7)	(6,273.4)	(6,078.2)
Ending balance, Net Carrying Value	$ 3,063.3	$ 3,160.3	$ 3,360.4