Additional Financial Information (Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash paid (received) during the year for:
Interest	$ 7,772	$ 7,485	$ 8,010
Income taxes paid, net of refunds	592	252	577
Capital Expenditures	19,626	15,545	14,690
Interest during construction, capital expenditures	(1,294)	(954)	(123)
Acquisitions	10,200	25,453	1,625
Income Taxes Paid	696	700	993
Business acquisition
Cash paid (received) during the year for:
Acquisitions	0	0	12
Spectrum Licenses
Cash paid (received) during the year for:
Acquisitions	9,080	24,672	1,613
Interest during construction, spectrum	1,120	781	0
Property, Plant and Equipment
Cash paid (received) during the year for:
Capital Expenditures	19,452	15,372	14,567
Interest during construction, capital expenditures	$ (174)	$ (173)	$ (123)