Property and Equipment (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment
Property and equipment, gross	$ 10,778,000,000		$ 10,778,000,000		$ 7,819,000,000
Less: Accumulated depreciation	(2,879,000,000)		(2,879,000,000)		(2,132,000,000)
Property and equipment, net	7,899,000,000		7,899,000,000		5,687,000,000
Interest costs capitalized	0	$ 0	0	$ 0
Land
Property, Plant and Equipment
Property and equipment, gross	692,000,000		692,000,000		596,000,000
Buildings
Property, Plant and Equipment
Property and equipment, gross	2,687,000,000		2,687,000,000		2,273,000,000
Leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	474,000,000		474,000,000		447,000,000
Network equipment
Property, Plant and Equipment
Property and equipment, gross	4,734,000,000		4,734,000,000		3,633,000,000
Computer software, office equipment and other
Property, Plant and Equipment
Property and equipment, gross	351,000,000		351,000,000		248,000,000
Construction in progress
Property, Plant and Equipment
Property and equipment, gross	$ 1,840,000,000		$ 1,840,000,000		$ 622,000,000