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Equity (Stock-Based Compensation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-based compensation
Stock based compensation costs	$ 119	$ 107	$ 100
Tax benefits related to stock-based compensation arrangements	19	$ 21	$ 17
Unrecognized stock based compensation costs	$ 148
Unrecognized stock based compensation costs weighted-average period of recognition (in years)	2 years 9 months 18 days
Common stock authorized for awards (in shares)	84,000,000
Share-based Payment Arrangement [Member]
Stock-based compensation
Number of additional shares available for grant (in shares)	0

X

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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