Long-Term Employee Benefits (Summarized Information on Pension and Other Long-Term Benefits Plans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at beginning of year		$ 20,446
Fair value of plan assets at end of year		17,497	$ 20,446
Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other liabilities (Note 15)		(8,478)	(9,017)
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Employer contributions		237	233
Other liabilities (Note 15)		(2,524)	(2,655)
Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		(8,597)	(9,223)
Net amount recognized		(8,597)	(9,223)
Pension Plan [Member] | Change In Benefit Obligation [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		29,669	26,289
Service cost		232	241
Interest cost		1,084	1,162
Plan participants' contributions		19	21
Actuarial (gain) loss		(1,404)	3,672
Amendments		0	(44)
Benefits paid		(1,761)	(1,651)
Effect of foreign exchange rates		(456)	0
Net effects of acquisitions/divestitures		(52)	(21)
Change in benefit obligation, Spin-off of Chemours		(1,237)	0
Benefit obligation at end of year		26,094	29,669
Pension Plan [Member] | Change In Plan Assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at beginning of year		20,446	20,614
Plan participants' contributions		19	21
Actual gain on plan assets		88	1,163
Employer contributions		308	311
Benefits paid		(1,761)	(1,651)
Effect of foreign exchange rates		(330)	0
Net effects of acquisitions/divestitures		(47)	(12)
Change in plan assets, Spin-off of Chemours		(1,226)	0
Fair value of plan assets at end of year		17,497	20,446
Pension Plan [Member] | United States Pension Plan of US Entity [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		(6,662)	(7,072)
Pension Plan [Member] | Foreign Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		(748)	(747)
Pension Plan [Member] | All Other Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan	[1]	(1,187)	(1,357)
Pension Plan [Member] | Assets of discontinued operations [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Assets of discontinued operations		0	92
Pension Plan [Member] | Other assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other assets		11	(28)
Pension Plan [Member] | Other accrued liabilities [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other accrued liabilities (Note 13)		(130)	(118)
Pension Plan [Member] | Liabilities of discontinued operations [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other accrued liabilities (Note 13)		0	(152)
Pension Plan [Member] | Other liabilities [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other liabilities (Note 15)		(8,478)	(9,017)
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		(2,758)	(2,889)
Net amount recognized		(2,758)	(2,889)
Other Long-Term Employee Benefit Plans [Member] | Change In Benefit Obligation [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		2,889	2,754
Service cost		15	17
Interest cost		112	121
Plan participants' contributions		45	37
Actuarial (gain) loss		(4)	280
Amendments		0	(50)
Benefits paid		(282)	(270)
Effect of foreign exchange rates		(6)	0
Net effects of acquisitions/divestitures		0	0
Change in benefit obligation, Spin-off of Chemours		(11)	0
Benefit obligation at end of year		2,758	2,889
Other Long-Term Employee Benefit Plans [Member] | Change In Plan Assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at beginning of year		0	0
Plan participants' contributions		45	37
Actual gain on plan assets		0	0
Employer contributions		237	233
Benefits paid		(282)	(270)
Effect of foreign exchange rates		0	0
Net effects of acquisitions/divestitures		0	0
Change in plan assets, Spin-off of Chemours		0	0
Fair value of plan assets at end of year		0	0
Other Long-Term Employee Benefit Plans [Member] | United States Pension Plan of US Entity [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		0	0
Other Long-Term Employee Benefit Plans [Member] | Foreign Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		0	0
Other Long-Term Employee Benefit Plans [Member] | All Other Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		(2,758)	(2,878)
Other Long-Term Employee Benefit Plans [Member] | Assets of discontinued operations [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Assets of discontinued operations		0	0
Other Long-Term Employee Benefit Plans [Member] | Other assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other assets		0	0
Other Long-Term Employee Benefit Plans [Member] | Other accrued liabilities [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other accrued liabilities (Note 13)		(234)	(223)
Other Long-Term Employee Benefit Plans [Member] | Liabilities of discontinued operations [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other accrued liabilities (Note 13)		0	(11)
Other Long-Term Employee Benefit Plans [Member] | Other liabilities [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Other liabilities (Note 15)		(2,524)	(2,655)
Performance Chemicals [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		0	(47)
Performance Chemicals [Member] | Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Funded status of plan		$ 0	$ (11)

[1] Includes pension plans maintained around the world where funding is not customary.