CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 191	$ 164	$ 576	$ 488
Less: Net income attributable to noncontrolling interest	11	12	36	35
Net income attributable to Masco Corporation	180	152	540	453
Other comprehensive income (loss), net of tax (Note L):
Cumulative translation adjustment	1	33	(14)	119
Interest rate swaps	0	0	1	2
Pension and other post-retirement benefits	4	4	12	11
Other comprehensive income (loss), net of tax	5	37	(1)	132
Less: Other comprehensive income (loss) attributable to noncontrolling interest	0	6	(12)	24
Other comprehensive income attributable to Masco Corporation	5	31	11	108
Total comprehensive income	196	201	575	620
Less: Total comprehensive income attributable to noncontrolling interest	11	18	24	59
Total comprehensive income attributable to Masco Corporation	$ 185	$ 183	$ 551	$ 561