Retirement Plans and Other Retiree Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
United States Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	$ 7	$ 7
Interest cost	25	26
Annual ESOP allocation	0	0
Expected return on plan assets	(28)	(28)
Amortization of transition and prior service costs (credits)	2	2
Amortization of actuarial loss	15	11
Net periodic benefit cost	21	18
International Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	5	5
Interest cost	9	9
Annual ESOP allocation	0	0
Expected return on plan assets	(6)	(7)
Amortization of transition and prior service costs (credits)	0	1
Amortization of actuarial loss	2	2
Net periodic benefit cost	10	10
Other Retiree Benefits [Member]
Components of net periodic benefit cost
Service Cost	3	3
Interest cost	11	11
Annual ESOP allocation	0	(1)
Expected return on plan assets	(1)	(1)
Amortization of transition and prior service costs (credits)	1	2
Amortization of actuarial loss	4	5
Net periodic benefit cost	$ 18	$ 19