Retirement and Postretirement Benefits (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
U.S Defined Benefit Plans [Member]
Components of the net periodic cost for retirement and postretirement benefits
Service cost	$ 4.9	$ 5.1	$ 14.8	$ 15.3
Interest cost	4.3	4.4	12.9	13.5
Expected return on plan assets	(5.4)	(5.9)	(16.3)	(18.0)
Curtailments/settlements		0.4		0.4
Amortization of prior service benefit	(0.3)	(0.3)	(0.9)	(0.9)
Amortization of unrecognized net loss (gain)	2.7	2.3	8.1	7.2
Net periodic cost (benefit) recognized	6.2	6.0	18.6	17.5
Non-U.S Defined Benefit Plans [Member]
Components of the net periodic cost for retirement and postretirement benefits
Service cost	1.3	1.3	3.8	3.7
Interest cost	3.3	3.3	9.9	9.8
Expected return on plan assets	(2.1)	(1.9)	(6.1)	(5.6)
Amortization of unrecognized net loss (gain)	0.5	0.6	1.5	1.8
Net periodic cost (benefit) recognized	3.0	3.3	9.1	9.7
Postretirement Medical Benefits [Member]
Components of the net periodic cost for retirement and postretirement benefits
Interest cost	0.5	0.5	1.4	1.5
Amortization of prior service benefit	(0.4)	(0.5)	(1.2)	(1.5)
Amortization of unrecognized net loss (gain)	(0.4)	(0.7)	(1.1)	(1.8)
Net periodic cost (benefit) recognized	$ (0.3)	$ (0.7)	$ (0.9)	$ (1.8)