Property, Plant and Equipment (Notes)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, plant and equipment consists of the following as of December 31, 2021 and 2020:


	December 31,
	2021		2020
Cable distribution systems	$	35,907	$	33,693
Customer premise equipment and installations	17,893		17,756
Vehicles and equipment	2,019		1,932
Buildings and improvements	5,729		5,396
Furniture, fixtures and equipment	7,015		7,219
	68,563		65,996
Less: accumulated depreciation	(34,253)		(31,639)
	$	34,310	$	34,357

The Company periodically evaluates the estimated useful lives used to depreciate its assets and the estimated amount of assets that will be abandoned or have minimal use in the future. A significant change in assumptions about the extent or timing of future asset retirements, or in the Company’s use of new technology and upgrade programs, could materially affect future depreciation expense.

Depreciation expense for the years ended December 31, 2021, 2020 and 2019 was $7.7 billion, $7.8 billion, and $7.8 billion, respectively.