Description of Business and Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2014	2015	2016
Shares used in computation of basic earnings per share	462	467	474
Total dilutive effect of outstanding stock awards	—	10	10
Shares used in computation of diluted earnings per share	462	477	484