Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment
Depreciation expense	$ 7,600	$ 7,600	$ 7,700
Property, plant and equipment, gross	77,271	72,203
Less: accumulated depreciation	(37,751)	(36,164)
Property, plant and equipment, net	39,520	36,039
Cable distribution systems
Property, Plant and Equipment
Property, plant and equipment, gross	44,561	39,759
Customer premise equipment and installations
Property, Plant and Equipment
Property, plant and equipment, gross	17,043	17,043
Vehicles and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	2,172	2,068
Buildings and improvements
Property, Plant and Equipment
Property, plant and equipment, gross	5,910	5,833
Furniture, fixtures and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	$ 7,585	$ 7,500
Minimum | Cable distribution systems
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	6 years
Minimum | Customer premise equipment and installations
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	3 years
Minimum | Vehicles and equipment
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	6 years
Minimum | Buildings and improvements
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	8 years
Minimum | Furniture, fixtures and equipment
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	2 years
Maximum | Cable distribution systems
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	22 years
Maximum | Customer premise equipment and installations
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	8 years
Maximum | Vehicles and equipment
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	21 years
Maximum | Buildings and improvements
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	40 years
Maximum | Furniture, fixtures and equipment
Property, Plant and Equipment
Property, plant and equipment, useful life (in years)	10 years