Retirement Benefits (Schedule of Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
U.S. Pension Benefits [Member]
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$ 467	$ 148	$ 42
Non- U.S Pension Benefits [Member]
Total recognized in net periodic benefit cost and other comprehensive loss (income)	792	66	519
U.S. Postretirement Benefits [Member]
Total recognized in net periodic benefit cost and other comprehensive loss (income)	(9)	26	(7)
Non- U.S Postretirement Benefits [Member]
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$ 12	$ 15	$ 3