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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 67	$ 67	$ 206	$ 201
Interest cost	272	290	816	882
Expected return on plan assets	(379)	(378)	(1,139)	(1,138)
Amortization of (gain) loss	244	222	724	661
Amortization of prior service cost (benefit)	2	3	8	10
Curtailment (gain) loss	0	2	1	2
Settlement loss	0	0	152	0
Net periodic benefit cost	206	206	768	618
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	9	23	28
Interest cost	32	41	98	137
Amortization of (gain) loss	26	24	51	68
Amortization of prior service cost (benefit)	(48)	(44)	(142)	(104)
Curtailment (gain) loss	0	3	(154)	3
Settlement loss	0	0	1	0
Net periodic benefit cost	$ 17	$ 33	$ (123)	$ 132