Stock-Based Incentive Compensation Plans (Compensation Expense By Award Type) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based compensation arrangement by share-based payment award [Line Items]
Compensation expense	$ 51	$ 61	$ 51
Recognized tax benefit	11	13	11
Stock Options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Compensation expense	6	8	10
Performance Shares [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Compensation expense	10	18	5
RSUs [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Compensation expense	$ 35	$ 35	$ 36

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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