Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 68	$ 59
Interest cost	297	310
Expected return on plan assets	(381)	(365)
Amortization of unrecognized loss	219	153
Amortization of prior service cost (benefit)	4	4
Net periodic benefit cost	207	161
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	8
Interest cost	48	53
Amortization of unrecognized loss	22	15
Amortization of prior service cost (benefit)	(30)	(30)
Net periodic benefit cost	$ 49	$ 46