Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Revenues	$ 5,604	$ 5,596	$ 16,570	$ 16,332
Costs and expenses:
Cost of goods sold	1,035	1,086	2,992	3,283
Research and development expenses	4,990	939	7,207	3,068
Selling, general and administrative expenses	1,052	948	3,177	2,925
Total costs and expenses	7,077	2,973	13,376	9,276
Income (loss) from operations	(1,473)	2,623	3,194	7,056
Interest expense	(250)	(264)	(752)	(820)
Other income (expense), net	222	305	817	547
Income (loss) before provision (benefit) for income taxes	(1,501)	2,664	3,259	6,783
Provision (benefit) for income taxes	(333)	565	584	1,326
Net income (loss)	(1,168)	2,099	2,675	5,457
Net income (loss) attributable to noncontrolling interest	(3)	2	(15)	5
Net income (loss) attributable to Gilead	$ (1,165)	$ 2,097	$ 2,690	$ 5,452
Net income (loss) per share attributable to Gilead common stockholders - basic (usd per share)	$ (0.92)	$ 1.62	$ 2.12	$ 4.19
Shares used in per share calculation - basic (in shares)	1,267	1,296	1,271	1,302
Net income (loss) per share attributable to Gilead common stockholders - diluted (usd per share)	$ (0.92)	$ 1.60	$ 2.10	$ 4.15
Shares used in per share calculation - diluted (in shares)	1,267	1,307	1,278	1,313
Product sales
Revenues:
Revenues	$ 5,516	$ 5,455	$ 16,323	$ 15,996
Royalty, contract and other revenues
Revenues:
Revenues	$ 88	$ 141	$ 247	$ 336