Earnings Per Share (EPS) And Dividends (Dividend Payments On Common Stock) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
DIVIDENDS PAID PER SHARE OF COMMON STOCK (in dollars per share)	$ 0.45	$ 0.43	$ 1.35	$ 1.29
Dividend Payments on Common Stock	$ 227	$ 217	$ 682	$ 652