CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 293	$ 138	$ 1,065	$ 517
Less: Net income attributable to noncontrolling interest	18	12	36	35
Net income attributable to Masco Corporation	275	126	1,029	482
Other comprehensive income (loss), net of tax (Note L):
Cumulative translation adjustment	32	(13)	15	(11)
Interest rate swaps	0	0	1	1
Pension and other post-retirement benefits	5	4	15	12
Other comprehensive income (loss), net of tax	37	(9)	31	2
Less: Other comprehensive income (loss) attributable to noncontrolling interest	9	(8)	8	(7)
Other comprehensive income (loss) attributable to Masco Corporation	28	(1)	23	9
Total comprehensive income	330	129	1,096	519
Less: Total comprehensive income attributable to noncontrolling interest	27	4	44	28
Total comprehensive income attributable to Masco Corporation	$ 303	$ 125	$ 1,052	$ 491