Reorganization Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 number	Mar. 31, 2014
Restructuring and Related Cost [Line Items]
Reorganization costs	$ 15.2	$ 49.4
Reorganization cost incurred to date	260.7
Reorganizations costs, expected costs	115.0
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability	38.0
Amounts charged to re-organization	15.2	49.4
Reorganization liability, Paid and Utilized	(10.1)
Reorganization Reserve Closing liability	43.1
Number of divisions	3
Involuntary termination benefits
Restructuring and Related Cost [Line Items]
Reorganization costs	9.4
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability	38.0
Amounts charged to re-organization	9.4
Reorganization liability, Paid and Utilized	(5.1)
Reorganization Reserve Closing liability	42.3
Other reorganization costs
Restructuring and Related Cost [Line Items]
Reorganization costs	5.8
Restructuring Reserve [Roll Forward]
Reorganization Reserve Opening liability	0
Amounts charged to re-organization	5.8
Reorganization liability, Paid and Utilized	(5.0)
Reorganization Reserve Closing liability	$ 0.8