Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements of Income [Abstract]
Net sales	$ 2,006	$ 1,957	$ 5,800	$ 5,857
Cost of sales	1,511	1,463	4,348	4,325
Gross profit	495	494	1,452	1,532
Selling, general and administrative expenses	393	392	1,238	1,233
Operating profit	102	102	214	299
Other income (expense), net:
Interest expense	(63)	(63)	(190)	(188)
Impairment charge for financial investments	0	0	0	(33)
Other, net	22	(1)	74	(2)
Total other income (expense), net	(41)	(64)	(116)	(223)
Income before income taxes	61	38	98	76
Income tax expense	12	31	63	53
Net income	49	7	35	23
Less: Net income attributable to noncontrolling interest	13	12	37	32
Net income (loss) attributable to Masco Corporation	36	(5)	(2)	(9)
Basic:
Net income (loss)	$ 0.10	$ (0.02)	$ (0.01)	$ (0.03)
Diluted:
Net income (loss)	$ 0.10	$ (0.02)	$ (0.01)	$ (0.03)
Amounts attributable to Masco Corporation:
Net income (loss)	$ 36	$ (5)	$ (2)	$ (9)