CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 2,179	$ 1,764	$ 4,149	$ 3,345
Cost of sales	1,388	1,136	2,658	2,170
Gross profit	791	628	1,491	1,175
Selling, general and administrative expenses	354	289	689	611
Operating profit	437	339	802	564
Other income (expense), net:
Interest expense	(25)	(35)	(227)	(70)
Other, net	(415)	(2)	(421)	(18)
Total other income (expense), net	(440)	(37)	(648)	(88)
(Loss) income from continuing operations before income taxes	(3)	302	154	476
Income tax expense	12	82	55	115
(Loss) income from continuing operations	(15)	220	99	361
Income from discontinued operations, net	0	14	0	411
Net (loss) income	(15)	234	99	772
Less: Net income attributable to noncontrolling interest	21	10	41	18
Net (loss) income attributable to Masco Corporation	$ (36)	$ 224	$ 58	$ 754
Basic:
Income from continuing operations (in dollars per share)	$ (0.14)	$ 0.80	$ 0.21	$ 1.27
(Loss) income from discontinued operations, net (in dollars per share)	0	0.05	0	1.53
Net income (in dollars per share)	(0.14)	0.85	0.21	2.80
Diluted:
Income from continuing operations (in dollars per share)	(0.14)	0.80	0.20	1.27
(Loss) income from discontinued operations, net (in dollars per share)	0	0.05	0	1.53
Net income (in dollars per share)	$ (0.14)	$ 0.85	$ 0.20	$ 2.80
Amounts attributable to Masco Corporation:
(Loss) income from continuing operations	$ (36)	$ 210	$ 58	$ 343
Income from discontinued operations, net	$ 0	$ 14	$ 0	$ 411