Earnings Per Share Of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
EPS of Common Stock
Income from continuing operations		$ 335	$ 24
Discontinued operations, net of tax	[1]	0	50
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS		$ 335	$ 74
Share count information:
Weighted average number of basic shares outstanding (in shares)		543,000	541,000
Assumed exercise of dilutive stock options and awards (in shares)		1,000	2,000
Weighted average number of diluted shares outstanding		544,000	543,000
Income available to common stockholders, per common share:
Income from continuing operations, basic (in dollars per share)		$ 0.62	$ 0.05
Discontinued operations, basic (in dollars per share)		0	0.09
Basic - Net Income Attributable to Common Stockholders (in dollars per share)		0.62	0.14
Income from continuing operations, diluted (in dollars per share)		0.62	0.05
Discontinued operations, diluted (in dollars per share)		0	0.09
Diluted - Net Income Attributable to Common Stockholders (in dollars per share)		$ 0.62	$ 0.14
Stock Options
Income available to common stockholders, per common share:
Shares excluded from the calculation of diluted shares outstanding, in shares		0	0

[1] Net of income tax benefits of $36 million for the three months ended March 31, 2020.