Share-Based Payments (Compensation Cost And Valuation Assumption) (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]
Total	$ 518	$ 447	$ 422
Income tax benefit	127	110	104
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	168	248	348
Restricted stock and stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	350	199	74
Other nonvested stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	0	0	0
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 0	$ 0	$ 0

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

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