Retirement and Postretirement Benefits (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
U.S Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future contribution to plan in 2013	$ 20,000,000
Components of the net periodic cost for retirement and postretirement benefits
Service cost	6,100,000	5,200,000
Interest cost	3,800,000	4,200,000
Expected return on plan assets	(5,100,000)	(5,400,000)
Amortization of prior service benefit	0	(300,000)
Amortization of unrecognized net loss (gain)	3,500,000	3,100,000
Net periodic cost (benefit) recognized	8,300,000	6,800,000
Non-U.S Defined Benefit Plans [Member]
Components of the net periodic cost for retirement and postretirement benefits
Service cost	1,700,000	1,100,000
Interest cost	3,400,000	3,400,000
Expected return on plan assets	(2,400,000)	(2,100,000)
Amortization of prior service benefit	0	0
Amortization of unrecognized net loss (gain)	1,700,000	1,000,000
Net periodic cost (benefit) recognized	4,400,000	3,400,000
Postretirement Medical Benefits [Member]
Components of the net periodic cost for retirement and postretirement benefits
Service cost	0	0
Interest cost	300,000	300,000
Expected return on plan assets	0	0
Amortization of prior service benefit	0	0
Amortization of unrecognized net loss (gain)	(300,000)	(500,000)
Net periodic cost (benefit) recognized	$ 0	$ (200,000)