Additional Financial Information (Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash paid (received) during the year for:
Interest	$ 7,132	$ 7,370	$ 7,772
Income taxes paid, net of refunds	2,456	1,599	592
Capital Expenditures	20,263	17,853	19,626
Interest Costs Capitalized	361	874	1,294
Acquisitions	380	2,942	10,200
Income Taxes Paid	2,456	1,599	696
Business acquisition
Cash paid (received) during the year for:
Acquisitions	0	0	0
Spectrum Licenses
Cash paid (received) during the year for:
Interest Costs Capitalized	199	695	1,120
Acquisitions	181	2,247	9,080
Property, Plant and Equipment
Cash paid (received) during the year for:
Capital Expenditures	20,101	17,674	19,452
Capital Expenditures | Property, Plant and Equipment
Cash paid (received) during the year for:
Interest Costs Capitalized	$ 162	$ 179	$ 174