Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost			$ 320	$ 294
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 42	$ 63	89	129
Interest cost	206	272	423	545
Expected return on plan assets	(331)	(401)	(669)	(805)
Amortization of loss	204	210	376	419
Amortization of prior service benefit	(1)	(1)	(3)	(3)
Curtailment (gain) loss	17	0	66	0
Settlement loss	37	4	38	9
Net periodic benefit cost	$ 174	147	$ 320	294
Defined benefit plan, discount rate	3.74%		3.74%		4.47%
Pension Plans [Member] | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 0	1	$ (4)	2
Pension Plans [Member] | Continuing Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	174	146	324	292
Pension Plans [Member] | Principal U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment (gain) loss	14		63
Defined benefit plan, re-measurement impact, underfunded status	2,352		2,352
Pension Plans [Member] | Pension Restoration Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	(31)
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	7	9
Interest cost	21	27	44	55
Amortization of loss	18	19	35	38
Amortization of prior service benefit	(36)	(52)	(75)	(104)
Curtailment (gain) loss	(3)	0	(33)	0
Net periodic benefit cost	$ 4	(1)	$ (22)	(2)
Defined benefit plan, discount rate	3.55%		3.55%		4.30%
Defined benefit plan, re-measurement impact, benefit obligation	$ 265		$ 265
Other Long-Term Employee Benefit Plans [Member] | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	0	1	0	2
Other Long-Term Employee Benefit Plans [Member] | Continuing Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 4	$ (2)	$ (22)	$ (4)