Pension and Other Postretirement Benefits (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
United States Pension Plans of US Entity Defined Benefit [Member]
Disclosure Net Pension Cost For Parent Company Pension Plans [Abstract]
Service cost-benefits earned during period	$ 14	$ 15	$ 44	$ 43
Interest cost on projected benefit obligation	37	35	112	106
Expected return on plan assets	(42)	(48)	(127)	(143)
Amortization of prior service cost	3	1	9	3
Amortization of net loss	23	14	67	45
Total Benefit cost	35	17	105	54
Foreign Pension Plans, Defined Benefit [Member]
Disclosure Net Pension Cost For Parent Company Pension Plans [Abstract]
Service cost-benefits earned during period	15	15	49	39
Interest cost on projected benefit obligation	56	53	169	156
Expected return on plan assets	(69)	(59)	(210)	(174)
Amortization of prior service cost	30	28	91	85
Amortization of net loss	7	5	23	15
Total Benefit cost	$ 39	$ 42	$ 122	$ 121