INTERIM CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net Income Attributable to Merck & Co., Inc.	$ 1,729	$ 1,692	$ 5,261	$ 4,760
Other Comprehensive Income Net of Taxes:
Net unrealized (loss) gain on derivatives, net of reclassifications	(143)	60	(99)	(77)
Net unrealized gain (loss) on investments, net of reclassifications	32	(6)	62	(11)
Benefit plan net gain and prior service cost, net of amortization	27	31	45	59
Cumulative translation adjustment	170	(22)	84	532
Total Other Comprehensive Income Net of Taxes	86	63	92	503
Comprehensive Income Attributable to Merck & Co., Inc.	$ 1,815	$ 1,755	$ 5,353	$ 5,263