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Earnings Per Share Net Income for Earnings Per Share Calculations - Basic and Diluted (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Income (loss) from continuing operations after income taxes	$ 1,018	$ 766	$ 1,631	$ 1,047
Net income (loss) Attributable to Noncontrolling Interest, Continuing Operations	3	6	6	16
Net income (loss) from Continuing Operations Available to Common Shareholders	1,015	760	1,625	1,031
Income (loss) from discontinued operations after income taxes	(45)	0	(55)	1
Net income (loss) Available to Common Stockholders	$ 970	$ 760	$ 1,570	$ 1,032

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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