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Discontinued Operations - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 06, 2019 | Dec. 31, 2019 | Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Business, net of cash disposed |  |  |  | $ 2 | $ 0
UK Window Group | Discontinued Operations, Disposed of by Sale |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from divestiture of businesses | $ 8 |  |  |  |
Gain (loss) on disposition of business |  |  | $ 70 | $ 70 |
Business, net of cash disposed | 2 |  |  |  |
Notes Receivable | UK Window Group | Discontinued Operations, Disposed of by Sale |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from divestiture of businesses | $ 6 |  |  |  |
Scenario, Forecast | Milgard Manufacturing Inc | Discontinued Operations, Held-for-sale |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from divestiture of businesses |  | $ 725 |  |  |
Gain (loss) on disposition of business |  | $ 395 |  |  |

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