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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 | 5. Property and Equipment Property and equipment as of December 31 consisted of the following (in millions):
|  | 2017 |  | 2016
Land |  | $ | 624 |  | $ | 608
Landfills |  |  | 14,904 |  |  | 14,276
Vehicles |  |  | 4,750 |  |  | 4,433
Machinery and equipment |  |  | 2,824 |  |  | 2,639
Containers |  |  | 2,571 |  |  | 2,469
Buildings and improvements |  |  | 2,846 |  |  | 2,667
Furniture, fixtures and office equipment |  |  | 744 |  |  | 1,010
|  |  | 29,263 |  |  | 28,102
Less: Accumulated depreciation of tangible property and equipment |  |  | (8,916) |  |  | (8,812)
Less: Accumulated amortization of landfill airspace |  |  | (8,788) |  |  | (8,340)
Property and equipment, net |  | $ | 11,559 |  | $ | 10,950
Depreciation and amortization expense, including amortization expense for assets recorded as capital leases, consisted of the following for the years ended December 31 (in millions):
|  | 2017 |  | 2016 |  | 2015
Depreciation of tangible property and equipment |  | $ | 783 |  | $ | 773 |  | $ | 760
Amortization of landfill airspace |  |  | 497 |  |  | 428 |  |  | 409
Depreciation and amortization expense |  | $ | 1,280 |  | $ | 1,201 |  | $ | 1,169

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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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