Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (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
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 67	$ 62	$ 201	$ 182
Interest cost	290	316	882	940
Expected return on plan assets	(378)	(371)	(1,138)	(1,105)
Amortization of unrecognized loss	222	153	661	459
Amortization of prior service cost (benefit)	3	4	10	12
Curtailment charge	2	0	2	0
Net periodic benefit cost	206	164	618	488
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	8	28	25
Interest cost	41	53	137	159
Amortization of unrecognized loss	24	15	68	45
Amortization of prior service cost (benefit)	(44)	(30)	(104)	(91)
Curtailment charge	3	0	3	0
Net periodic benefit cost	$ 33	$ 46	$ 132	$ 138