INTERIM CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Sales	$ 11,488	$ 12,022	$ 35,530	$ 35,753
Costs, Expenses and Other
Materials and production	4,137	4,352	12,286	12,695
Marketing and administrative	3,063	3,340	9,386	10,029
Research and development	1,918	1,954	5,944	6,048
Restructuring costs	110	119	473	773
Equity income from affiliates	(158)	(161)	(410)	(354)
Other (income) expense, net	200	66	446	809
Total Costs, Expenses and Other	9,270	9,670	28,125	30,000
Income Before Taxes	2,218	2,352	7,405	5,753
Taxes on Income	455	628	2,055	904
Net Income	1,763	1,724	5,350	4,849
Less: Net Income Attributable to Noncontrolling Interests	34	32	89	89
Net Income Attributable to Merck & Co., Inc.	$ 1,729	$ 1,692	$ 5,261	$ 4,760
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders	$ 0.57	$ 0.55	$ 1.73	$ 1.54
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders	$ 0.56	$ 0.55	$ 1.71	$ 1.53
Dividends Declared per Common Share	$ 0.42	$ 0.38	$ 1.26	$ 1.14