Property and Equipment, Net

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and equipment, net, consists of the following:



(in millions)	December 31, 2017			December 31, 2016
Software	$	114		$	88
Office equipment, including data processing equipment	23			21
Leasehold improvements	15			12
Furniture, fixtures, and equipment	15			11
Projects in progress	7			11
Total	174			143
Less: Accumulated depreciation	(104		)	(84		)
Property and equipment, net	$	70		$	59

Projects in progress consist primarily of development costs for internally developed software, which we capitalize and amortize on a straight-line basis over the estimated useful life. We recognized depreciation expense for capitalized internally developed software of $17 million, $10 million, and $5 million for the years ended December 31, 2017, 2016 and 2015, respectively.