Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Product sales	$ 7,405	$ 4,871
Royalty, contract and other revenues	189	128
Total revenues	7,594	4,999
Cost of goods sold
Cost of goods sold	882	813
Research and development expenses	696	595
Selling, general and administrative expenses	645	548
Total costs and expenses	2,223	1,956
Income from operations	5,371	3,043
Interest expense	(153)	(76)
Other income (expense), net	21	(18)
Income before provision for income taxes	5,239	2,949
Provision for income taxes	907	726
Net income	4,332	2,223
Net loss attributable to noncontrolling interest	1	4
Net income attributable to Gilead	$ 4,333	$ 2,227
Net income per share attributable to Gilead common stockholders—basic (usd per share)	$ 2.91	$ 1.45
Shares used in per share calculation—basic (shares)	1,488	1,537
Net income per share attributable to Gilead common stockholders—diluted (usd per share)	$ 2.76	$ 1.33
Shares used in per share calculation—diluted (shares)	1,569	1,680