Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 60	$ 71
Interest cost	292	273
Expected return on plan assets	(402)	(382)
Amortization of loss	149	241
Amortization of prior service cost (benefit)	1	3
Curtailment (gain) loss	0	1
Settlement loss	0	152
Net periodic benefit cost	100	359
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	8
Interest cost	31	33
Amortization of loss	14	27
Amortization of prior service cost (benefit)	(53)	(48)
Curtailment (gain) loss	0	(154)
Settlement loss	0	1
Net periodic benefit cost	$ (4)	$ (133)