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Property and Equipment, Net (Tables)
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment, net The estimated useful lives of our property and equipment are as follows:
 
 
Buildings and improvements
7 - 40 years
Vehicles
5 - 12 years
Landfill equipment
5 - 7 years
Other equipment
3 - 20 years
Furniture and fixtures
10 years
A summary of property and equipment, net as of December 31 follows:
 
2018
 
2017
Land
$
443.6

 
$
433.2

Non-depletable landfill land
167.5

 
166.9

Landfill development costs
7,106.0

 
6,757.3

Vehicles and equipment
7,377.3

 
6,954.3

Buildings and improvements
1,279.8

 
1,221.5

Construction-in-progress - landfill
287.9

 
233.2

Construction-in-progress - other
89.9

 
55.7

 
$
16,752.0

 
$
15,822.1

Less: accumulated depreciation, depletion and amortization
 
 
 
Landfill development costs
$
(3,635.9
)
 
$
(3,317.3
)
Vehicles and equipment
(4,571.1
)
 
(4,259.7
)
Buildings and improvements
(524.9
)
 
(467.7
)
 
(8,731.9
)
 
(8,044.7
)
Property and equipment, net
$
8,020.1

 
$
7,777.4