Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost			$ 294	$ 205
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 63	$ 60	129	120
Interest cost	272	293	545	585
Expected return on plan assets	(401)	(404)	(805)	(806)
Amortization of loss	210	150	419	299
Amortization of prior service (benefit) cost	(1)	0	(3)	1
Curtailment loss	0	4	0	4
Settlement loss	4	2	9	2
Net periodic benefit cost	147	105	294	205
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	5	9	9
Interest cost	27	30	55	61
Amortization of loss	19	14	38	28
Amortization of prior service (benefit) cost	(52)	(53)	(104)	(106)
Net periodic benefit cost	$ (1)	$ (4)	$ (2)	$ (8)