PROPERTY AND EQUIPMENT

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

PROPERTY AND EQUIPMENT, NET

Property and equipment, net at December 31, 2019 and 2018 consist of the following (in millions):

	2019			2018			Estimated Useful Lives (years)
Computer equipment	$	736		$	616		2 to 4 years
Capitalized software	442			348			2 to 5 years
Leasehold improvements	265			242			1 to 13 years
Office equipment, furniture and fixtures	61			55			2 to 7 years
Building construction-in-progress	161			88
Total	1,665			1,349
Less: Accumulated depreciation	(927		)	(693		)
Property and equipment, net	$	738		$	656

Depreciation expense was $294 million, $248 million and $187 million for the years ended December 31, 2019, 2018 and 2017, respectively.