CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 1,970	$ 1,581
Cost of sales	1,270	1,034
Gross profit	700	547
Selling, general and administrative expenses	335	322
Operating profit	365	225
Other income (expense), net:
Interest expense	(202)	(35)
Other, net	(6)	(16)
Total other income (expense), net	(208)	(51)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	157	174
Income tax expense	43	33
Income from continuing operations	114	141
Income from discontinued operations, net	0	397
Net income	114	538
Less: Net income attributable to noncontrolling interest	20	8
Net income attributable to Masco Corporation	$ 94	$ 530
Basic:
Income from continuing operations (in dollars per share)	$ 0.34	$ 0.49
(Loss) income from discontinued operations, net (in dollars per share)	0	1.44
Net income (in dollars per share)	0.34	1.93
Diluted:
Income from continuing operations (in dollars per share)	0.34	0.48
(Loss) income from discontinued operations, net (in dollars per share)	0	1.44
Net income (in dollars per share)	$ 0.34	$ 1.92
Amounts attributable to Masco Corporation:
Income from continuing operations	$ 94	$ 133
Income from discontinued operations, net	$ 0	$ 397