Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Calculation of Diluted Shares

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

	Three Months Ended March 31,
	2018	2019
Shares used in computation of basic earnings per share	484	491
Total dilutive effect of outstanding stock awards	14	11
Shares used in computation of diluted earnings per share	498	502