Property and Equipment, net |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2018 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property, Plant and Equipment, Net [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property and Equipment, net | Property and equipment were as follows as of December 31:
Depreciation and amortization expense related to property and equipment was $347 million, $313 million and $266 million for the years ended December 31, 2018, 2017 and 2016, respectively. The gross amount of property and equipment recorded under capital leases was $73 million and $44 million as of December 31, 2018 and 2017, respectively. Accumulated amortization and amortization expense related to capital lease assets were immaterial for the periods presented. The gross amount of property and equipment recorded for software to be sold, leased or marketed in the caption "Computer software" above was $85 million and $52 million, as of December 31, 2018 and 2017, respectively. Accumulated amortization for software to be sold, leased or marketed was $24 million and $12 million as of December 31, 2018 and 2017, respectively. Amortization expense for software to be sold, leased or marketed recorded as property and equipment was $14 million for the year ended December 31, 2018 and was immaterial for the years ended December 31, 2017 and 2016. |