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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.

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