Equity and Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Weighted Average Number of Common and Common Equivalent Shares Used in Calculation of Basic and Diluted Earnings Per Share

The weighted average number of common and common equivalent shares used in the calculation of basic and diluted earnings per share consisted of the following:

	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
	(In millions)
Weighted-average common shares outstanding (used in the calculation of basic earnings per share)	789	792	789	793
Potential dilution from stock options and restricted stock and stock units	1	—	1	1
Weighted-average common and common equivalent shares (used in the calculation of diluted earnings per share)	790	792	790	794
Antidilutive stock options excluded from the calculation of diluted earnings per share	1	7	1	7