Employee Retirement Benefits (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Mar. 31, 2013 plan	Dec. 31, 2012	Mar. 31, 2013 Pension Benefits	Mar. 31, 2012 Pension Benefits	Mar. 31, 2013 Pension Benefits - U.S.	Mar. 31, 2012 Pension Benefits - U.S.	Mar. 31, 2013 Pension Benefits - Non-U.S.	Mar. 31, 2012 Pension Benefits - Non-U.S.	Mar. 31, 2013 Pension Benefits - U.K.	Mar. 31, 2012 Pension Benefits - U.K.	Mar. 31, 2013 Postretirement Benefits (U.S.)	Mar. 31, 2012 Postretirement Benefits (U.S.)	Mar. 31, 2013 Key officer postretirement car benefit plan	Mar. 31, 2013 Key officer postretirement car benefit plan Minimum
Components of Net Periodic Benefit Cost:
Service cost					$ 7.3	$ 6.3	$ 0.6	$ 0.3			$ 0.1	$ 0.1
Interest cost					6.7	6.5	2.3	2.3			0.2	0.2
Expected return on plan assets					(7.5)	(7.3)	(3.1)	(3.0)			0	0
Net amortizations					4.3	2.8	0.1	0			0	0
Net pension/postretirement expense					10.8	8.3	(0.1)	(0.4)			0.3	0.3
Other disclosures
Company contributions			3.7	20.3
Discretionary cash contributions to qualified pension plan									3.0	3.2
Service period														20 years
Retirement age														58 years
Term of available benefit until participant reaches a specific age													15 years
Eligible age for car benefit													80 years
Number of multiemployer plans with significant underfunded liabilities	1
Multiemployer plans, withdrawal obligation		$ 23.2