Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Calculation of Diluted Shares

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

	Three Months Ended   March 31,
	2016	2017
Shares used in computation of basic earnings per share	471	477
Total dilutive effect of outstanding stock awards	10	13
Shares used in computation of diluted earnings per share	481	490