Long-Term Employee Benefits (Schedules of Net Periodic Benefit Costs) (Details) (Other Long-Term Employee Benefit Plans Defined Benefit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Service cost	$ 33	$ 29	$ 31
Interest cost	212	238	245
Amortization of loss	60	58	50
Amortization of prior service benefit	(121)	(106)	(106)
Net periodic benefit (credit) cost	184	219	220
Net (gain) / loss	437	94	110
Amortization of loss	(60)	(58)	(50)
Prior service cost	11	(189)	(4)
Amortization of prior service cost	121	106	106
Total recognized in other comprehensive income	509	(47)	162
Total recognized in net periodic benefit cost and other comprehensive income	$ 693	$ 172	$ 382