CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 2,101	$ 1,945	$ 6,318	$ 5,789
Cost of sales	1,434	1,288	4,282	3,781
Gross profit	667	657	2,036	2,008
Selling, general and administrative expenses	367	348	1,134	1,070
Operating profit	300	309	902	938
Other income (expense), net:
Interest expense	(38)	(43)	(117)	(239)
Other, net	0	(2)	(11)	37
Total other income (expense), net	(38)	(45)	(128)	(202)
Income before income taxes	262	264	774	736
Income tax expense	71	100	198	248
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
Basic:
Net income (in dollars per share)	$ 0.59	$ 0.48	$ 1.74	$ 1.42
Diluted:
Net income (in dollars per share)	$ 0.58	$ 0.48	$ 1.73	$ 1.41