CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (15)	$ 234	$ 99	$ 772
Less: Net income attributable to noncontrolling interest	21	10	41	18
Net (loss) income attributable to Masco Corporation	(36)	224	58	754
Other comprehensive income (loss), net of tax (Note L):
Cumulative translation adjustment	37	12	1	(17)
Interest rate swaps	0	1	7	1
Pension and other post-retirement benefits	358	5	363	10
Other comprehensive income (loss), net of tax	395	18	371	(6)
Less: Other comprehensive income (loss) attributable to noncontrolling interest	2	3	(10)	(1)
Other comprehensive income (loss) attributable to Masco Corporation	393	15	381	(5)
Total comprehensive income	380	252	470	766
Less: Total comprehensive income attributable to noncontrolling interest	23	13	31	17
Total comprehensive income attributable to Masco Corporation	$ 357	$ 239	$ 439	$ 749