CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 138	$ 191	$ 517	$ 576
Less: Net income attributable to noncontrolling interest	12	11	35	36
Net income attributable to Masco Corporation	126	180	482	540
Other comprehensive income (loss), net of tax (Note L):
Cumulative translation adjustment	(13)	1	(11)	(14)
Interest rate swaps	0		1
Interest rate swaps		0		1
Pension and other post-retirement benefits	4	4	12	12
Other comprehensive (loss) income, net of tax	(9)	5	2	(1)
Less: Other comprehensive (loss) income attributable to noncontrolling interest	(8)	0	(7)	(12)
Other comprehensive (loss) income attributable to Masco Corporation	(1)	5	9	11
Total comprehensive income	129	196	519	575
Less: Total comprehensive income attributable to noncontrolling interest	4	11	28	24
Total comprehensive income attributable to Masco Corporation	$ 125	$ 185	$ 491	$ 551