Acquisitions - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
	Jun. 01, 2017	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Income taxes						$ 41,540
Effect of divestiture on basic net income per common share (in dollars per share)		$ 0.00		$ 0.00	$ 0.00	$ (0.45)
Effect of divestiture on diluted net income per common share (in dollars per share)		$ 0.00		$ 0.00	$ 0.00	$ (0.44)
Goodwill		$ 6,963,198		$ 6,915,028	$ 6,963,198	$ 6,915,028		$ 6,814,345
Interest expense related to acquisition		92,281		91,593	277,335	174,017
North American Industrial Wood Coatings Business | Discontinued Operations
Business Acquisition [Line Items]
Divestiture proceeds	$ 431,000
Income taxes	$ 41,500
Valspar Corporation
Business Acquisition [Line Items]
Acquisition purchase price (in dollars per share)	$ 113
Total purchase price, net of divestiture proceeds	$ 8,900,000
Finite-lived intangible assets			$ 4,922,900				$ 5,071,800
Reduction of amortization expense			7,700
Reduction of amortization expense related to the year ended December 31, 2017			5,400
Reduction of amortization expense related to the three months ended June 30, 2018			2,300
Goodwill			5,888,800				$ 5,654,400
Acquisition-related costs and purchase accounting amortization impacts		111,700			346,900
Interest expense related to acquisition		$ 66,600		70,800	$ 204,400	112,200
Acquisition transaction expenses				$ 192,500		$ 286,500
Valspar Corporation | The Americas Group
Business Acquisition [Line Items]
Goodwill	2,000,000
Valspar Corporation | Consumer Brands Group
Business Acquisition [Line Items]
Goodwill	1,100,000
Valspar Corporation | Performance Coatings Group
Business Acquisition [Line Items]
Goodwill	$ 2,800,000
Valspar Corporation | Customer relationships and intellectual property and technology | Minimum
Business Acquisition [Line Items]
Weighted average amortization period	15 years
Valspar Corporation | Customer relationships and intellectual property and technology | Maximum
Business Acquisition [Line Items]
Weighted average amortization period	20 years
Valspar Corporation | Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible assets			3,200,000
Valspar Corporation | Intellectual Property and Technology
Business Acquisition [Line Items]
Finite-lived intangible assets			$ 1,700,000