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PROPERTY, EQUIPMENT AND SOFTWARE, NET
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY, EQUIPMENT AND SOFTWARE, NET PROPERTY, EQUIPMENT AND SOFTWARE, NET
Property, equipment and software, net, consists of the following:
(in millions)
December 31, 2019
December 31, 2018
Software
$
174

$
144

Office equipment, including data processing equipment
27

27

Leasehold improvements
24

21

Furniture, fixtures, and equipment
17

15

Projects in progress
3

2

Total
245

209

Less: Accumulated depreciation
(160
)
(130
)
Property and equipment, net
$
85

$
79


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.
The following table summarizes our depreciation expense and capitalized internally developed software costs and related depreciation expense.
 
Year Ended December 31,
(in millions)
2019
2018
2017
Depreciation expense
$
41

$
35

$
28

Capitalized internally developed software costs
31

33

29

Depreciation expense for capitalized internally developed software costs
29

24

17