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Discontinued Operations - Additional Information (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
ROU assets obtained in exchange for new lease obligations | $ 20 |
Milgard and UKWG | Discontinued Operations, Held-for-sale or Disposed of by Sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Depreciation and amortization | 17 | $ 17
Capital expenditures | 15 | $ 15
ROU assets obtained in exchange for new lease obligations | $ 3 |

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