Postemployment Benefit Plans (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net periodic benefit costs
Service cost	$ 14	$ 15	$ 47	$ 47
Interest cost	21	22	62	58
Expected return on plan assets	(20)	(19)	(64)	(56)
Settlements and curtailments	1	7	2	10
Actuarial losses, net	7	1	19	12
Prior service cost, net			(2)	(2)
Transition obligation, net	(1)
Net periodic benefit costs	22	26	64	69
Funding contributions	9	44	93	106
U.S. Plans
Net periodic benefit costs
Service cost	10	10	32	31
Interest cost	15	14	44	41
Expected return on plan assets	(15)	(14)	(47)	(43)
Settlements and curtailments	1	6	2	8
Actuarial losses, net	5	3	17	10
Prior service cost, net			(1)	(1)
Net periodic benefit costs	16	19	47	46
Funding contributions	1	14	69	65
Non-U.S. Plans
Net periodic benefit costs
Service cost	4	5	14	15
Interest cost	5	7	16	15
Expected return on plan assets	(5)	(5)	(17)	(13)
Settlements and curtailments		1		2
Actuarial losses, net	2	(2)	2	2
Prior service cost, net	1		1
Transition obligation, net	(1)
Net periodic benefit costs	6	6	16	21
Funding contributions	7	29	20	37
OPEB Plans
Net periodic benefit costs
Service cost			1	1
Interest cost	1	1	2	2
Prior service cost, net	(1)		(2)	(1)
Net periodic benefit costs		1	1	2
Funding contributions	$ 1	$ 1	$ 4	$ 4