Description of Business and Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares

The following table shows the calculation of diluted shares (in millions):

	Year Ended December 31,
	2015	2014	2013
Shares used in computation of basic earnings per share	467	462	457
Total dilutive effect of outstanding stock awards	10	—	8
Shares used in computation of diluted earnings per share	477	462	465