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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Common Stock, Dividends, Per Share, Cash Paid	$ 0.57	$ 0.54	$ 1.71	$ 1.62
Dividend Payments on Common Stock	$ 284	$ 269	$ 853	$ 810