Reorganization Costs (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) number	Sep. 30, 2014 USD ($)
Restructuring and Related Cost [Line Items]
Reorganization costs	$ 31.1	$ 28.2	$ 59.6	$ 123.4
Reorganization cost incurred to date	305.1		305.1
Reorganizations costs, expected costs	85.0		85.0
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			38.0
Amounts charged to re-organization	31.1	$ 28.2	59.6	$ 123.4
Reorganization liability, Paid and Utilized			(64.1)
Reorganization Reserve Closing liability	33.5		$ 33.5
Number of divisions | number			3
Involuntary termination benefits
Restructuring and Related Cost [Line Items]
Reorganization costs			$ 38.5
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			38.0
Amounts charged to re-organization			38.5
Reorganization liability, Paid and Utilized			(53.7)
Reorganization Reserve Closing liability	22.8		22.8
Other reorganization costs
Restructuring and Related Cost [Line Items]
Reorganization costs			21.1
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			0.0
Amounts charged to re-organization			21.1
Reorganization liability, Paid and Utilized			(10.4)
Reorganization Reserve Closing liability	$ 10.7		$ 10.7