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SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Sales
Net sales	$ 1,860	$ 1,983	$ 1,764	$ 1,581	$ 1,639	$ 1,716	$ 1,839	$ 1,513	$ 7,188	$ 6,707	$ 6,654
Operating profit									1,295	1,088	1,077
Other income (expense), net									(164)	(174)	(170)
Income from continuing operations before income taxes									1,131	914	907
Assets	5,777				5,027				5,777	5,027	5,393
Assets held for sale	0				528				0	528	1,195
Export sales from U.S. included in net sales									$ 274	$ 244	$ 237
Maximum
Net Sales
Intra-company sales between segments in percentage									1.00%	1.00%	1.00%
One customer | Customer concentration risk | Sales
Net Sales
Net sales									$ 2,812	$ 2,481	$ 2,457
North America
Net Sales
Net sales									5,805	5,328	5,208
International, principally Europe
Net Sales
Net sales									1,383	1,379	1,446
United States
Net Sales
Long-lived assets	1,301				1,198				1,301	1,198	1,119
United States | Sales
Net Sales
Net sales									5,592	5,127	5,034
Europe
Net Sales
Long-lived assets	522				470				522	470	446
Plumbing Products
Net Sales
Net sales									4,136	3,984	3,998
Plumbing Products | North America
Net Sales
Net sales									2,753	2,605	2,552
Plumbing Products | International, principally Europe
Net Sales
Net sales									1,383	1,379	1,446
Decorative Architectural Products
Net Sales
Net sales									3,052	2,723	2,656
Decorative Architectural Products | North America
Net Sales
Net sales									3,052	2,723	2,656
Decorative Architectural Products | International, principally Europe
Net Sales
Net sales									0	0	0
Operating Segments
Net Sales
Net sales									7,188	6,707	6,654
Operating profit									1,389	1,188	1,171
Assets	4,455				3,901				4,455	3,901	3,787
Operating Segments | North America
Net Sales
Net sales									5,805	5,328	5,208
Operating profit									1,167	987	954
Assets	3,101				2,785				3,101	2,785	2,729
Operating Segments | International, principally Europe
Net Sales
Net sales									1,383	1,379	1,446
Operating profit									222	201	217
Assets	1,354				1,116				1,354	1,116	1,058
Operating Segments | Plumbing Products
Net Sales
Net sales									4,136	3,984	3,998
Operating profit									806	708	715
Assets	2,822				2,375				2,822	2,375	2,253
Operating Segments | Decorative Architectural Products
Net Sales
Net sales									3,052	2,723	2,656
Operating profit									583	480	456
Assets	1,633				1,526				1,633	1,526	1,534
Corporate, Non-Segment
Net Sales
General corporate expense, net									(94)	(100)	(94)
Assets	$ 1,322				$ 598				$ 1,322	$ 598	$ 411

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