Pension and Other Postretirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 0	$ 2	$ 0
Interest cost	45	48	134	144
Expected return on plan assets	(48)	(48)	(145)	(144)
Amortization
Actuarial loss	11	8	34	24
Prior service credit	1	1	3	3
Settlement and curtailment (gain) loss	1	0	5	0
Net periodic benefit cost	9	7	27	21
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	5	6
Interest cost	6	5	15	15
Expected return on plan assets	(3)	(3)	(8)	(9)
Amortization
Actuarial loss	1	1	3	3
Prior service credit	0	0	0	0
Settlement and curtailment (gain) loss	1	0	1	0
Net periodic benefit cost	7	5	16	15
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	5	6
Interest cost	5	7	16	24
Expected return on plan assets	0	0	0	0
Amortization
Actuarial loss	0	0	0	0
Prior service credit	11	12	34	30
Settlement and curtailment (gain) loss	(3)	0	(52)	0
Net periodic benefit cost	$ (7)	$ (3)	$ (65)	$ 0