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Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Sep. 30, 2021
Goodwill [Line Items]      
Gross goodwill   $ 978 $ 993
Accumulated Impairment Losses   (415) (376)
Net goodwill   563 617
Goodwill [Roll Forward]      
Gross goodwill   978 993
Accumulated Impairment Losses   (415) (376)
Goodwill, beginning balance     563
Acquisitions     64
Other     (10)
Goodwill, ending balance   563 617
Goodwill, Written off Related to Sale of Business Unit $ 39    
Plumbing Products (A)      
Goodwill [Line Items]      
Gross goodwill   613 627
Accumulated Impairment Losses   (340) (301)
Net goodwill   273 326
Goodwill [Roll Forward]      
Gross goodwill   613 627
Accumulated Impairment Losses   (340) (301)
Goodwill, beginning balance     273
Acquisitions     63
Other     (10)
Goodwill, ending balance   273 326
Decorative Architectural Products      
Goodwill [Line Items]      
Gross goodwill   365 366
Accumulated Impairment Losses   (75) (75)
Net goodwill   290 291
Goodwill [Roll Forward]      
Gross goodwill   365 366
Accumulated Impairment Losses   (75) (75)
Goodwill, beginning balance     290
Acquisitions     1
Other     0
Goodwill, ending balance   $ 290 $ 291