Net Income per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of basic and diluted net income per share

	Year Ended December 31,
	2014		2013		2012
	(In millions, except per share amounts)
Numerator:
Net income	$	46	$	2,856	$	2,609
Denominator:
Weighted average shares of common stock - basic	1,251		1,295		1,292
Dilutive effect of equity incentive awards	11		18		21
Weighted average shares of common stock - diluted	1,262		1,313		1,313
Net income per share:
Basic	$	0.04	$	2.20	$	2.02
Diluted	$	0.04	$	2.18	$	1.99
Common stock equivalents excluded from income per diluted share because their effect would have been anti-dilutive	7		4		4