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Property and Equipment | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment as of December 31, 2017 and 2016 consists of the following (in millions):
| 2017 |  | 2016
Land | $ | 31 |  |  | $ | 31 |
Buildings | 228 |  |  | 204 |
Leasehold improvements | 158 |  |  | 137 |
Computer equipment | 1,073 |  |  | 909 |
Furniture, fixtures, and other equipment | 167 |  |  | 207 |
| 1,657 |  |  | 1,488 |
Accumulated depreciation and amortization | (1,047 | ) |  | (862 | )
| $ | 610 |  |  | $ | 626 |
During the years ended December 31, 2017 and 2016, the Company entered into capital lease and other financing obligations of $84 million and $43 million, respectively, for certain computer hardware and software. The assets are included in property and equipment and computer software and the remaining capital lease obligation is classified as long-term debt on our Consolidated Balance Sheets as of December 31, 2017. Periodic payments are included in repayment of borrowings on the Consolidated Statements of Cash Flows. Depreciation and amortization expense on property and equipment, including that recorded under capital leases, amounted to $180 million, $185 million and $139 million for the years ended December 31, 2017, 2016 and 2015, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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