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Other Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Accumulated Amortization | $ (23) |
Net Carrying Amount | $ 117 |
Finite-Lived Intangible Asset, Useful Life | 4 years 8 months 26 days |
Total, Gross Carrying Amount | $ 140 |
Total, Net Carrying Amount | 117 |
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 77 |
Finite-Lived Intangible Assets, Accumulated Amortization | (14) |
Net Carrying Amount | $ 63 |
Finite-Lived Intangible Asset, Useful Life | 5 years 7 months 24 days |
Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 52 |
Finite-Lived Intangible Assets, Accumulated Amortization | (8) |
Net Carrying Amount | $ 44 |
Finite-Lived Intangible Asset, Useful Life | 3 years 6 months 25 days |
Trade name |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 8 |
Finite-Lived Intangible Assets, Accumulated Amortization | (1) |
Net Carrying Amount | $ 7 |
Finite-Lived Intangible Asset, Useful Life | 4 years 7 months 24 days |
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 3 |
Finite-Lived Intangible Assets, Accumulated Amortization | 0 |
Net Carrying Amount | $ 3 |
Finite-Lived Intangible Asset, Useful Life | 4 years 9 months 24 days |
Predecessor |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ (14)
Finite-Lived Intangible Asset, Useful Life |  | 4 years 9 months 24 days
Total, Gross Carrying Amount |  | $ 33
Total, Net Carrying Amount |  | 19
Predecessor | Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross |  | 8
Finite-Lived Intangible Assets, Accumulated Amortization |  | (3)
Net Carrying Amount |  | $ 5
Finite-Lived Intangible Asset, Useful Life |  | 6 years 7 months 24 days
Predecessor | Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross |  | $ 12
Finite-Lived Intangible Assets, Accumulated Amortization |  | (6)
Net Carrying Amount |  | $ 6
Finite-Lived Intangible Asset, Useful Life |  | 4 years 8 months 24 days
Predecessor | Trade name |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross |  | $ 12
Finite-Lived Intangible Assets, Accumulated Amortization |  | (5)
Net Carrying Amount |  | $ 7
Finite-Lived Intangible Asset, Useful Life |  | 4 years
Predecessor | Licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-Lived Intangible Assets |  | $ 1

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