Earnings Per Share (EPS) and Dividends (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Basic And Diluted Earnings Per Share Computation

The following table shows the effect of these stock options, performance units and restricted stock units on the weighted average number of shares outstanding used in calculating diluted EPS:

	Years Ended December 31,
	2017				2016				2015
	Basic		Diluted		Basic		Diluted		Basic		Diluted
EPS Numerator:
(Millions)
Net Income	$	1,574	$	1,574	$	887	$	887	$	1,679	$	1,679
EPS Denominator:
(Millions)
Weighted Average Common Shares Outstanding	505		505		505		505		505		505
Effect of Stock Based Compensation Awards	—		2		—		3		—		3
Total Shares	505		507		505		508		505		508
EPS:
Net Income	$	3.12	$	3.10	$	1.76	$	1.75	$	3.32	$	3.30

Dividend Payments On Common Stock

	Years Ended December 31,
Dividend Payments on Common Stock	2017		2016		2015
Per Share	$	1.72	$	1.64	$	1.56
in Millions	$	870	$	830	$	789