Stockholders' Equity (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	$ (8,556)		$ (5,290)	$ (8,495)
Other comprehensive income (loss) before reclassifications, securities	(17)	[1]	0	0
Other comprehensive income (loss) before reclassifications	(1,605)		(3,575)	2,656
Amounts reclassified from accumulated other comprehensive income (loss)	297		309	549
Spin-off of Chemours	468
Accumulated other comprehensive loss, ending balance	(9,396)		(8,556)	(5,290)
Cumulative Translation Adjustment [Member]
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	(919)		(43)	(70)
Other comprehensive income (loss) before reclassifications, CTA	(1,605)		(876)	27
Amounts reclassified from accumulated other comprehensive income (loss)	0		0	0
Spin-off of Chemours	191
Accumulated other comprehensive loss, ending balance	(2,333)		(919)	(43)
Net Revaluation and Clearance of Cash Flow Hedges to Earnings [Member]
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	(6)		(48)	3
Other comprehensive income (loss) before reclassifications, cash flow hedges	(25)		33	(36)
Amounts reclassified from accumulated other comprehensive income (loss), cash flow hedges	7		9	(15)
Spin-off of Chemours	0
Accumulated other comprehensive loss, ending balance	(24)		(6)	(48)
Pension Benefit Plans, Net [Member]
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	(7,895)		(5,695)	(8,632)
Other comprehensive income (loss) before reclassifications, pension and other benefit plans	39		(2,601)	2,197
Amounts reclassified from accumulated other comprehensive income (loss), pension and other benefit plans	535		401	740
Spin-off of Chemours	278
Accumulated other comprehensive loss, ending balance	(7,043)		(7,895)	(5,695)
Other Long-Term Employee Benefit Plans [Member]
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	262		494	202
Other comprehensive income (loss) before reclassifications, pension and other benefit plans	3		(131)	468
Amounts reclassified from accumulated other comprehensive income (loss), pension and other benefit plans	(243)		(101)	(176)
Spin-off of Chemours	0
Accumulated other comprehensive loss, ending balance	22		262	494
Unrealized Gain (Loss) on Securities [Member]
AOCI [Roll Forward]
Accumulated other comprehensive loss, beginning balance	2		2	2
Other comprehensive income (loss) before reclassifications, securities	(17)		0	0
Amounts reclassified from accumulated other comprehensive income (loss), securities	(2)		0	0
Spin-off of Chemours	(1)
Accumulated other comprehensive loss, ending balance	$ (18)		$ 2	$ 2

[1] The unrealized loss on securities during the year ended December 31, 2015 is due to the re-measurement of USD denominated marketable securities held by certain foreign entities at December 31, 2015 with a corresponding offset to cumulative translation adjustment.