Acquisitions, Dispositions And Other Adjustments (Schedule of Assets & Liabilities Held-For-Sale) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Jul. 31, 2021
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Current assets	$ 0	$ 119,776
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Current liabilities	$ 0	$ 33,555
Business Unit Held-for-Sale | Video Business Unit
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Current assets			$ 4,893
Property, plant and equipment – net			2,673
Other assets			1,787
Total Assets, discontinued operations			16,785
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Current liabilities			4,267
Long-term debt			206
Other noncurrent liabilities			343
Total Liabilities, discontinued operations			4,816
Business Unit Held-for-Sale | Licenses | Video Business Unit
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Intangible assets - net			5,798
Business Unit Held-for-Sale | Other Intangible Assets | Video Business Unit
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Intangible assets - net			$ 1,634