Stockholders' Equity Stockholders' Equity (Schedule of Components of Other Comprehensive Income / (Loss)) (Details) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	$ (9,911)		$ (9,396)		$ (8,556)		$ (5,290)
Other comprehensive (loss) income before reclassifications	(850)		(1,605)		(3,575)
Amounts reclassified from accumulated other comprehensive loss	335		297		309
Other comprehensive (loss) income	(515)		(1,308)		(3,265)
Spin-off of Chemours			468
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(2,843)	[1]	(2,333)	[1]	(919)	[1]	(43)
Other comprehensive (loss) income before reclassifications	(510)		(1,605)		(876)
Amounts reclassified from accumulated other comprehensive loss	0		0		0
Other comprehensive (loss) income	(510)		(1,605)		(876)
Spin-off of Chemours			191
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	7		(24)		(6)		(48)
Other comprehensive (loss) income before reclassifications	20		(25)		33
Amounts reclassified from accumulated other comprehensive loss	11		7		9
Other comprehensive (loss) income	31		(18)		42
Spin-off of Chemours			0
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(6,720)		(7,043)		(7,895)		(5,695)
Other comprehensive (loss) income before reclassifications	(271)		39		(2,601)
Amounts reclassified from accumulated other comprehensive loss	594		535		401
Other comprehensive (loss) income	323		574		(2,200)
Spin-off of Chemours			278
Other Post Employment Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(357)		22		262		494
Other comprehensive (loss) income before reclassifications	(81)		3		(131)
Amounts reclassified from accumulated other comprehensive loss	(298)		(243)		(101)
Other comprehensive (loss) income	(379)		(240)		(232)
Spin-off of Chemours			0
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	2		(18)		2		$ 2
Other comprehensive (loss) income before reclassifications	(8)		(17)		0
Amounts reclassified from accumulated other comprehensive loss	28		(2)		0
Other comprehensive (loss) income	20		(19)		0
Spin-off of Chemours			(1)
Other Comprehensive (Loss) Income, Net of Tax, Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income					(3,266)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ 335		$ 297		$ 309

[1] The currency translation loss for the year ended December 31, 2016 is primarily driven by the strengthening of the U.S. dollar (USD) against the European Euro (EUR) partially offset by the weakening of the USD against the Brazilian real (BRL). The currency translation loss for the years ended December 31, 2015 and 2014 is driven by the strengthening USD against primarily the EUR and BRL. For the year ended December 31, 2015, the increase over prior year is also due to changes in certain foreign entity's functional currency as described in Note 1.