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Acquisitions - Narrative (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 01, 2017 | Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |  |
Enterprise value |  |  | $ 84,400,000 |  |  |
Income taxes from discontinued operations |  |  |  |  | $ 41,600,000 |
Discontinued operations, diluted (in dollars per share) |  |  |  |  | $ 0.44 |
Discontinued operations, basic (in dollars per share) |  |  |  |  | $ 0.44 |
Goodwill |  |  | 7,004,800,000 | $ 6,956,700,000 | $ 6,814,300,000 | $ 1,126,900,000
The Americas Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  | 2,256,600,000 | 2,256,600,000 | 2,555,600,000 | 285,400,000
Consumer Brands Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  | 1,753,900,000 | 1,753,800,000 | 2,233,200,000 | 699,900,000
Performance Coatings Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  | $ 2,994,300,000 | $ 2,946,300,000 | 2,025,500,000 | $ 141,600,000
North American Industrial Wood Coatings Business | Discontinued Operations |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from divested assets sold | $ 431,000,000.0 |  |  |  |  |
Pre-tax gain or loss from discontinued operations | 0 |  |  |  |  |
Income taxes from discontinued operations |  |  |  |  | $ 41,500,000 |
Valspar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Enterprise value | $ 8,900,000,000 |  |  |  |  |
Acquisition purchase price (in dollars per share) | $ 113 |  |  |  |  |
Finite-lived intangible assets | $ 4,922,900,000 |  |  |  |  |
Reduction of amortization expense related to measurement period adjustments for finite-lived intangible assets |  | $ (7,700,000) |  |  |  |
Goodwill | 5,888,800,000 |  |  |  |  |
Valspar | The Americas Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 2,000,000,000.0 |  |  |  |  |
Valspar | Consumer Brands Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 1,100,000,000 |  |  |  |  |
Valspar | Performance Coatings Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 2,800,000,000 |  |  |  |  |
Valspar | Customer Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets | 3,200,000,000 |  |  |  |  |
Valspar | Intellectual Property |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets | $ 1,700,000,000 |  |  |  |  |
Valspar | Customer relationships and intellectual property and technology | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average amortization period | 15 years |  |  |  |  |
Valspar | Customer relationships and intellectual property and technology | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average amortization period | 20 years |  |  |  |  |

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