Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table is a reconciliation of the numerator and denominator used in the calculation of basic and diluted net income per share attributable to Gilead common stockholders (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Numerator:
Net income attributable to Gilead	$	788,606	$	675,505	$	2,283,397	$	1,829,025
Denominator:
Weighted-average shares of common stock outstanding used in the calculation of basic net income per share attributable to Gilead common stockholders	1,532,105		1,514,770		1,526,847		1,514,064
Effect of dilutive securities:
Stock options and equivalents	38,575		32,478		39,085		30,926
Conversion spread related to the May 2013 Notes	—		11,446		5,268		8,950
Conversion spread related to the May 2014 Notes	24,335		11,860		27,435		7,058
Conversion spread related to the May 2016 Notes	33,873		11,452		30,587		6,650
Warrants related to the Convertible Notes	63,010		2,602		60,425		—
Weighted-average shares of common stock outstanding used in the calculation of diluted net income per share attributable to Gilead common stockholders	1,691,898		1,584,608		1,689,647		1,567,648