Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property and equipment consists of the following (in millions):



	March 31, 2018			December 31, 2017
Land	$	825		$	798
Buildings	4,957			4,909
Leasehold improvements	1,197			959
Network equipment	9,227			7,998
Computer software, office equipment and other	770			681
Construction in progress	4,316			2,992
Total	21,292			18,337
Less: Accumulated depreciation	(5,081		)	(4,616		)
Property and equipment, net	$	16,211		$	13,721