Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2021
Goodwill [Line Items]
Gross goodwill	$ 968	$ 978	$ 968
Accumulated Impairment Losses	(376)	(415)	(376)
Net goodwill	592	563	592
Goodwill [Roll Forward]
Gross goodwill	968	978	968
Accumulated Impairment Losses	(376)	(415)	(376)
Goodwill, beginning balance			563
Acquisitions			35
Other			(6)
Goodwill, ending balance	592	563	592
Goodwill, Written off Related to Sale of Business Unit	39
Plumbing Products (A)
Goodwill [Line Items]
Gross goodwill	602	613	602
Accumulated Impairment Losses	(301)	(340)	(301)
Net goodwill	301	273	301
Goodwill [Roll Forward]
Gross goodwill	602	613	602
Accumulated Impairment Losses	(301)	(340)	(301)
Goodwill, beginning balance			273
Acquisitions			34
Other			(6)
Goodwill, ending balance	301	273	301
Decorative Architectural Products
Goodwill [Line Items]
Gross goodwill	366	365	366
Accumulated Impairment Losses	(75)	(75)	(75)
Net goodwill	291	290	291
Goodwill [Roll Forward]
Gross goodwill	366	365	366
Accumulated Impairment Losses	(75)	(75)	(75)
Goodwill, beginning balance			290
Acquisitions			1
Other			0
Goodwill, ending balance	$ 291	$ 290	$ 291