Goodwill And Other Intangible Assets (Schedule Of Indefinite-Life Intangible Assets Not Subject To Amortization) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Indefinite-lived Intangible Assets [Line Items]
Total	$ 130,316	$ 129,975
Wireless Licenses
Indefinite-lived Intangible Assets [Line Items]
Total	125,075	124,734
Trade names
Indefinite-lived Intangible Assets [Line Items]
Total	$ 5,241	$ 5,241

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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