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Property and Equipment
 12 Months Ended
Dec. 31, 2018
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):

 

 

 

 

 

 

 

 

    

2018

    

2017

Land

 

$

656

 

$

624

Landfills

 

 

15,240

 

 

14,904

Vehicles

 

 

5,059

 

 

4,750

Machinery and equipment

 

 

2,988

 

 

2,824

Containers

 

 

2,588

 

 

2,571

Buildings and improvements

 

 

2,998

 

 

2,846

Furniture, fixtures and office equipment

 

 

677

 

 

744

 

 

 

30,206

 

 

29,263

Less: Accumulated depreciation of tangible property and equipment

 

 

(9,107)

 

 

(8,916)

Less: Accumulated amortization of landfill airspace

 

 

(9,157)

 

 

(8,788)

Property and equipment, net

 

$

11,942

 

$

11,559

 

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):

 

 

 

 

 

 

 

 

 

 

 

    

2018

    

2017

    

2016

Depreciation of tangible property and equipment

 

$

838

 

$

783

 

$

773

Amortization of landfill airspace

 

 

538

 

 

497

 

 

428

Depreciation and amortization expense

 

$

1,376

 

$

1,280

 

$

1,201