Pension and Postretirement Plans (Details) (USD $) In Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
U.S. Pension
Other Pension Plan Information
Contributions to plan		$ 100
Net periodic benefit costs
Service cost	11.7		12.7	35.1	38.1
Interest cost on benefit obligation	15.3		15.6	45.9	46.8
Expected return on plan assets	(24.7)		(22.5)	(74.1)	(67.5)
Recognition of net actuarial loss	8.0		6.2	24.0	18.6
Amortization of prior service cost (benefit)	(1.1)		0.1	(3.3)	0.3
Total expense	9.2		12.1	27.6	36.3
International Pension Benefits
Other Pension Plan Information
Contributions to plan				32
Contributions expected to be made during the remainder of the current fiscal year	9			9
Net periodic benefit costs
Service cost	6.0		4.9	17.5	14.1
Interest cost on benefit obligation	7.2		6.7	21.2	19.6
Expected return on plan assets	(5.7)		(4.4)	(16.9)	(12.7)
Recognition of net actuarial loss	1.5		1.1	4.3	3.0
Amortization of prior service cost (benefit)			0.1		0.3
Total expense	9.0		8.4	26.1	24.3
U.S. Postretirement Health Care Benefits
Net periodic benefit costs
Service cost	0.5		0.5	1.5	1.5
Interest cost on benefit obligation	2.1		2.2	6.3	6.6
Expected return on plan assets	(0.4)		(0.4)	(1.2)	(1.2)
Recognition of net actuarial loss	0.1		0.1	0.3	0.3
Amortization of prior service cost (benefit)			(0.1)		(0.3)
Total expense	$ 2.3		$ 2.3	$ 6.9	$ 6.9