Reorganization Costs (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) number	Jun. 30, 2014 USD ($)
Restructuring and Related Cost [Line Items]
Reorganization costs	$ 13.3	$ 45.8	$ 28.5	$ 95.2
Reorganization cost incurred to date	274.0		274.0
Reorganizations costs, expected costs	102.0		102.0
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			38.0
Amounts charged to re-organization	13.3	$ 45.8	28.5	$ 95.2
Reorganization liability, Paid and Utilized			(33.3)
Reorganization Reserve Closing liability	33.2		$ 33.2
Number of divisions | number			3
Involuntary termination benefits
Restructuring and Related Cost [Line Items]
Reorganization costs			$ 19.7
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			38.0
Amounts charged to re-organization			19.7
Reorganization liability, Paid and Utilized			(26.4)
Reorganization Reserve Closing liability	31.3		31.3
Other reorganization costs
Restructuring and Related Cost [Line Items]
Reorganization costs			8.8
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability			0.0
Amounts charged to re-organization			8.8
Reorganization liability, Paid and Utilized			(6.9)
Reorganization Reserve Closing liability	$ 1.9		$ 1.9