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Discontinued Operations - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 06, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Businesses, net of cash disposed |  |  |  |  | $ 868 | $ 2 |
Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
(Loss) gain on disposal of discontinued operations | $ 0 |  |  | $ (70) | 602 | (70) |
Income before income tax, discontinued operations | 0 |  |  | (36) | 594 | 23 |
Masco Cabinetry |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Income before income tax, discontinued operations |  |  |  | 28 | (8) | 86 |
Letters of credit outstanding, amount | 10 |  |  |  | 10 |  |
Masco Cabinetry | Discontinued Operations, Held-for-sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Businesses, net of cash disposed |  |  | $ 989 |  |  |  |
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 |  |  |  | 6 |  | 7 |
Milgard [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Businesses, net of cash disposed |  |  |  |  | 15 |  |
(Loss) gain on disposal of discontinued operations |  | $ 17 |  |  |  |  |
Short term receivable from divestiture of businesses, payable in five monthly installments | $ 2 |  |  |  | $ 2 |  |
UK Window Group |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture |  |  |  | 8 |  |  |
Businesses, net of cash disposed |  |  |  | 2 |  |  |
Consideration received |  |  |  |  |  |  | $ 6
Notes receivable, collection period |  |  |  |  | 2 years |  |
Gain (loss) on disposition of business |  |  |  | $ 70 |  | $ 70 |
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] |  |  |  |  |  |  |
Businesses, net of cash disposed |  |  | 853 |  |  |  |
ACProducts Preferred Stock | Masco Cabinetry | 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 |  |  | $ 136 |  |  |  |

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