Property, Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 307,689	$ 289,897
Less Accumulated depreciation	200,255	190,201
Property, plant and equipment, net	107,434	99,696
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	747	673
Buildings and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 35,382	33,361
Buildings and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	7 years
Buildings and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	45 years
Central office and other network equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 162,001	153,240
Central office and other network equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	3 years
Central office and other network equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	15 years
Antennas, cable, conduit, poles and towers
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 75,622	69,733
Antennas, cable, conduit, poles and towers | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	4 years
Antennas, cable, conduit, poles and towers | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	50 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 10,159	9,587
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	20 years
Work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 12,889	13,057
Furniture, vehicles and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 10,889	$ 10,246
Furniture, vehicles and other | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	3 years
Furniture, vehicles and other | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	20 years