Property and Equipment (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property, Plant and Equipment
Property and equipment, gross	$ 8,813,000,000		$ 7,819,000,000
Less: Accumulated depreciation	(2,346,000,000)		(2,132,000,000)
Property and equipment, net	6,467,000,000		5,687,000,000
Interest costs capitalized	0	$ 0
Land
Property, Plant and Equipment
Property and equipment, gross	683,000,000		596,000,000
Buildings
Property, Plant and Equipment
Property and equipment, gross	2,551,000,000		2,273,000,000
Leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	310,000,000		447,000,000
Network equipment
Property, Plant and Equipment
Property and equipment, gross	4,106,000,000		3,633,000,000
Computer software, office equipment and other
Property, Plant and Equipment
Property and equipment, gross	276,000,000		248,000,000
Construction in progress
Property, Plant and Equipment
Property and equipment, gross	$ 887,000,000		$ 622,000,000