Earnings Per Share (EPS) And Dividends (Dividend Payments On Common Stock) (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Jul. 18, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
DIVIDENDS PAID PER SHARE OF COMMON STOCK (in dollars per share)		$ 0.43	$ 0.41	$ 0.86	$ 0.82
Dividend Payments on Common Stock		$ 217	$ 208	$ 435	$ 415
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.43