Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales	$ 47,267	$ 48,047	$ 45,987
Costs, Expenses and Other
Materials and production	16,446	16,871	18,396
Marketing and administrative	12,776	13,733	13,125
Research and development	8,168	8,467	11,111
Restructuring costs	664	1,306	985
Equity income from affiliates	(642)	(610)	(587)
Other (income) expense, net	1,116	946	1,304
Total Costs, Expenses and Other	38,528	40,713	44,334
Income Before Taxes	8,739	7,334	1,653
Taxes on Income	2,440	942	671
Net Income	6,299	6,392	982
Less: Net Income Attributable to Noncontrolling Interests	131	120	121
Net Income Attributable to Merck & Co., Inc.	$ 6,168	$ 6,272	$ 861
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders	$ 2.03	$ 2.04	$ 0.28
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders	$ 2.00	$ 2.02	$ 0.28