Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost			$ 474	$ 445
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 44	$ 50	133	179
Interest cost	189	270	612	815
Expected return on plan assets	(327)	(375)	(996)	(1,180)
Amortization of loss	229	172	605	591
Amortization of prior service benefit	(2)	(3)	(5)	(6)
Curtailment (gain) loss, net	(1)	(7)	65	(7)
Settlement loss	22	44	60	53
Net periodic benefit cost	154	151	474	445
Defined benefit plan, discount rate					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	(7)	(4)	(5)
Pension Plans [Member] | Continuing Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	154	158	478	450
Pension Plans [Member] | Principal U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment (gain) loss, net			63
Defined benefit plan, re-measurement impact, underfunded status			2,352
Pension Plans [Member] | Pension Restoration Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	15	44	51	44
Charge related to prior period settlements		32		32
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	9	12
Interest cost	20	28	64	83
Amortization of loss	21	20	56	58
Amortization of prior service benefit	(36)	(39)	(111)	(143)
Curtailment (gain) loss, net	0	(274)	(33)	(274)
Net periodic benefit cost	7	(262)	(15)	(264)
Defined benefit plan, discount rate					3.55%	4.30%
Defined benefit plan, re-measurement impact, benefit obligation			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	(274)	0	(272)
Other Long-Term Employee Benefit Plans [Member] | Continuing Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 7	$ 12	$ (15)	$ 8