Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Line Items]

Property and Equipment

December 31 (in millions)	Weighted-Average Original Useful Life As of December 31, 2016	2016		2015
Cable distribution system	11 years	$	34,028	$	32,586
Customer premise equipment	6 years	28,621		28,559
Other equipment	8 years	9,475		8,539
Buildings and leasehold improvements	29 years	12,550		10,829
Land	N/A	1,273		1,252
Property and equipment, at cost		85,947		81,765
Less: Accumulated depreciation		49,694		48,100
Property and equipment, net		$	36,253	$	33,665

NBCUniversal Media LLC [Member]

Property, Plant and Equipment [Line Items]

Property and Equipment

December 31 (in millions)	Weighted-Average Original Useful Life as of December 31, 2016	2016		2015
Buildings and leasehold improvements	30 years	$	7,543	$	6,543
Furniture, fixtures and equipment	11 years	4,158		3,457
Construction in process	N/A	1,176		1,339
Land	N/A	984		961
Property and equipment, at cost		13,861		12,300
Less: Accumulated depreciation		3,350		2,779
Property and equipment, net		$	10,511	$	9,521