Stockholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		4 Months Ended	8 Months Ended		12 Months Ended
		Dec. 31, 2017	Aug. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Predecessor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ 12,517	$ 10,196		$ 10,200		$ 13,378
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			321		335		297
Net other comprehensive income (loss)			1,289		(515)		(1,308)
Ending Balance			12,517		10,196		10,200
Predecessor [Member] | Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(1,801)	(2,843)		(2,333)		(919)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	[1]		1,042		(510)		(1,605)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			0		0		0
Net other comprehensive income (loss)			1,042		(510)		(1,605)
Spin-off of Chemours							191
Ending Balance			(1,801)		(2,843)		(2,333)
Predecessor [Member] | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(3)	7		(24)		(6)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			3		20		(25)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			(13)		11		7
Net other comprehensive income (loss)			(10)		31		(18)
Spin-off of Chemours							0
Ending Balance			(3)		7		(24)
Predecessor [Member] | Unrealized gain (loss) on investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		2	2		(18)		2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			1		(8)		(17)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			(1)		28		(2)
Net other comprehensive income (loss)			0		20		(19)
Spin-off of Chemours							(1)
Ending Balance			2		2		(18)
Predecessor [Member] | Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(8,622)	(9,911)		(9,396)		(8,556)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			968		(850)		(1,605)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			321		335		297
Net other comprehensive income (loss)			1,289		(515)		(1,308)
Spin-off of Chemours							468
Ending Balance			(8,622)		(9,911)		(9,396)
Successor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		75,081
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		(381)
Ending Balance		74,932	75,081
Successor [Member] | Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	[1]	(454)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		(454)
Ending Balance		(454)	0	[2]
Successor [Member] | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(2)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		(2)
Ending Balance		(2)	0	[2]
Successor [Member] | Unrealized gain (loss) on investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		0
Ending Balance		0	0	[2]
Successor [Member] | Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(381)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		(381)
Ending Balance		(381)	0	[2]
Other Benefit Plans | Predecessor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(347)	(357)		22		262
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0		(81)		3
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			10		(298)		(243)
Net other comprehensive income (loss)			10		(379)		(240)
Spin-off of Chemours							0
Ending Balance			(347)		(357)		22
Other Benefit Plans | Successor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(53)
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		(53)
Ending Balance		(53)	0	[2]
Pension Plan | Predecessor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(6,473)	(6,720)		(7,043)		(7,895)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(78)		(271)	[3]	39
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax			325		594		535
Net other comprehensive income (loss)			247		323		574
Spin-off of Chemours							278
Ending Balance			(6,473)		$ (6,720)		$ (7,043)
Pension Plan | Successor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[2]	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		128
Amounts Reclassified from Accumulated Other Comprehensive Income, Net of Tax		0
Net other comprehensive income (loss)		128
Ending Balance		$ 128	$ 0	[2]

[1] The cumulative translation adjustment loss for the period September 1 through December 31, 2017 is primarily driven by the strengthening of the U.S dollar (USD) against the European Euro (EUR) and the Brazilian real (BRL). The cumulative translation adjustment gain for the period January 1 through August 31, 2017 is primarily driven by the weakening of the USD against the EUR. The currency translation loss for the year ended December 31, 2016 is primarily driven by the strengthening of the USD against the EUR partially offset by the weakening of the USD against the BRL. The currency translation loss for the year ended December 31, 2015 is driven by the strengthening USD against primarily the EUR and BRL.

[2] In connection with the Merger, balances in accumulated other comprehensive loss at Merger Effectiveness Time were eliminated as a result of reflecting the balance sheet at fair value as of the date of the Merger. See Note 3 and 16 for further information regarding the Merger and pension and OPEB plans, respectively.

[3] The Pension Benefit Plans loss recognized in other comprehensive (loss) income during the year ended December 31, 2016 includes the impact of the remeasurement of the principal U.S. pension plan as of June 30, 2016. See Note 16 for additional information.