Retirement Plans and Other Retiree Benefits (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Voluntary benefit plan contributions			$ (178)	$ (35)
United States Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	5	11	18	36
Interest cost	24	23	75	71
Annual ESOP allocation	0	0	0	0
Expected return on plan assets	(27)	(25)	(83)	(76)
Amortization of transition and prior service costs (credits)	2	1	7	3
Amortization of actuarial loss	12	13	35	35
Net periodic benefit cost	16	23	52	69
International Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	6	4	16	13
Interest cost	9	9	28	26
Annual ESOP allocation	0	0	0	0
Expected return on plan assets	(7)	(7)	(21)	(19)
Amortization of transition and prior service costs (credits)	0	1	2	1
Amortization of actuarial loss	2	2	7	7
Net periodic benefit cost	10	9	32	28
Other Retiree Benefits [Member]
Components of net periodic benefit cost
Service Cost	2	3	8	10
Interest cost	8	9	29	30
Annual ESOP allocation	0	(1)	(1)	(5)
Expected return on plan assets	(1)	(1)	(2)	(2)
Amortization of transition and prior service costs (credits)	0	0	3	0
Amortization of actuarial loss	3	4	12	11
Net periodic benefit cost	$ 12	$ 14	$ 49	$ 44