Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,764	$ 1,839	$ 3,345	$ 3,352
Contract with customer, asset, gross, current	2		2		$ 2
Contract with customer, liability	17		17		$ 40
Contract with customer, liability, revenue recognized	3	1
Performance obligation satisfied in previous period	2	1	5	1
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1 (after adopting ASU 2016-13)			5
Provision for expected credit losses during the period			2
Write-offs charged against the allowance			(1)
Recoveries of amounts previously written off			1
Balance at end of period	7		7
Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	868	1,012	1,823	1,952
Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	896	827	1,522	1,400
North America
Disaggregation of Revenue [Line Items]
Net sales	1,480	1,488	2,738	2,659
North America | Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	584	661	1,216	1,259
North America | Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	896	827	1,522	1,400
International, principally Europe
Disaggregation of Revenue [Line Items]
Net sales	284	351	607	693
International, principally Europe | Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	284	351	607	693
International, principally Europe | Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0