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Discontinued Operations - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Business, net of cash disposed | $ 853 | $ 0
Discontinued Operations, Disposed of by Sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Income before income tax, discontinued operations |  | 15
Masco Cabinetry |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Income before income tax, discontinued operations | (9) | 23
Masco Cabinetry | Discontinued Operations, Held-for-sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Business, net of cash disposed | 989 |
Proceeds from divestiture of businesses | 136 |
Gain (loss) on disposition of business | 585 |
Milgard and UKWG |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Income before income tax, discontinued operations |  | $ 8
Cash and Cash Equivalents | Masco Cabinetry | Discontinued Operations, Disposed of by Sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Business, net of cash disposed | 853 |
Masco Cabinetry | Financial Guarantee |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Guarantor obligations, maximum exposure, undiscounted | 33 |
Masco Cabinetry |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Letters of credit outstanding, amount | $ 10 |

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