CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 2,204	$ 1,983	$ 6,353	$ 5,328
Cost of sales	1,451	1,231	4,109	3,401
Gross profit	753	752	2,244	1,927
Selling, general and administrative expenses	368	328	1,057	939
Operating profit	385	424	1,187	988
Other income (expense), net:
Interest expense	(26)	(40)	(253)	(110)
Other, net	(17)	(4)	(438)	(22)
Total other income (expense), net	(43)	(44)	(691)	(132)
Income from continuing operations before income taxes	342	380	496	856
Income tax expense	103	87	158	202
Income from continuing operations	239	293	338	654
Income from discontinued operations, net	0	0	0	411
Net income	239	293	338	1,065
Less: Net income attributable to noncontrolling interest	19	18	60	36
Net income attributable to Masco Corporation	$ 220	$ 275	$ 278	$ 1,029
Basic:
Income from continuing operations (in dollars per share)	$ 0.89	$ 1.05	$ 1.08	$ 2.31
(Loss) income from discontinued operations, net (in dollars per share)	0	0	0	1.54
Net income (in dollars per share)	0.89	1.05	1.08	3.85
Diluted:
Income from continuing operations (in dollars per share)	0.89	1.05	1.07	2.31
(Loss) income from discontinued operations, net (in dollars per share)	0	0	0	1.54
Net income (in dollars per share)	$ 0.89	$ 1.05	$ 1.07	$ 3.85
Amounts attributable to Masco Corporation:
Income from continuing operations	$ 220	$ 275	$ 278	$ 618
Income from discontinued operations, net	$ 0	$ 0	$ 0	$ 411