Earnings Per Share Of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
EPS of Common Stock
Net Income	$ 288	$ 335
Share count information:
Weighted average number of basic shares outstanding (in shares)	570,000	543,000
Assumed exercise of dilutive stock options and awards (in shares)	1,000	1,000
Weighted average number of diluted shares outstanding	571,000	544,000
EPS of Common Stock:
Basic - EPS of Common Stock (in dollars per share)	$ 0.51	$ 0.62
Diluted - EPS to Common Stock (in dollars per share)	$ 0.50	$ 0.62
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted shares outstanding, in shares	0	0