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Stock Compensation Plans - Stock Compensation Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock-based compensation plans expense	$ 128	$ 116	$ 125
Income tax benefit	(22)	(20)	(21)
Excess tax benefit on awards vested, exercised and expired	(6)	(1)	(6)
Total stock-based compensation plans expense, after-tax	$ 100	$ 95	$ 98

X

- Definition

Employee Service Share-based Compensation, Excess Tax Benefit from Compensation Expense

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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-Topic 718
-SubTopic 10
-Section 50
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