Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Calculation of Diluted Shares

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

	Three Months Ended   June 30,		Six Months Ended   June 30,
	2016	2017	2016	2017
Shares used in computation of basic earnings per share	473	479	472	478
Total dilutive effect of outstanding stock awards	10	13	10	13
Shares used in computation of diluted earnings per share	483	492	482	491