CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 252	$ 224	$ 379	$ 385
Less: Net income attributable to noncontrolling interest	12	13	23	25
Net income attributable to Masco Corporation	240	211	356	360
Other comprehensive income (loss), net of tax (Note K):
Cumulative translation adjustment	5	(57)	2	(15)
Interest rate swaps	1		1
Interest rate swaps		1		1
Pension and other post-retirement benefits	4	3	8	8
Other comprehensive income (loss), net of tax	10	(53)	11	(6)
Less: Other comprehensive income (loss) attributable to noncontrolling interest	4	(19)	1	(12)
Other comprehensive income (loss) attributable to Masco Corporation	6	(34)	10	6
Total comprehensive income	262	171	390	379
Less: Total comprehensive income (loss) attributable to noncontrolling interest	16	(6)	24	13
Total comprehensive income attributable to Masco Corporation	$ 246	$ 177	$ 366	$ 366