Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,581	$ 1,513
Contract with customer, asset, gross, current	2		$ 2
Contract with customer, liability	12		$ 40
Performance obligation satisfied in previous period	3
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
Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	955	940
Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	626	573
North America
Disaggregation of Revenue [Line Items]
Net sales	1,258	1,171
North America | Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	632	598
North America | Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	626	573
International, principally Europe
Disaggregation of Revenue [Line Items]
Net sales	323	342
International, principally Europe | Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	323	342
International, principally Europe | Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0