Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) (Net Periodic Benefit (Credit) Cost [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 71	$ 68
Interest cost	273	297
Expected return on plan assets	(382)	(381)
Amortization of loss	241	219
Amortization of prior service cost (benefit)	3	4
Curtailment (gain) loss	1	0
Settlement loss	152	0
Net periodic benefit cost	359	207
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	9
Interest cost	33	48
Amortization of loss	27	22
Amortization of prior service cost (benefit)	(48)	(30)
Curtailment (gain) loss	(154)	0
Settlement loss	1	0
Net periodic benefit cost	$ (133)	$ 49