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Real Estate Property, Net and Other Property, Net (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule of Real Estate Property, Net Estimated useful lives of property are as follows:
ClassificationRange of Life (in years)
Building and improvements
10 to 40
Leasehold improvements
5 to 10 (lesser of useful life or lease term)
Water, power and sewer systems
5 to 50
Asphalt plants, machinery and equipment
2 to 35
Other property improvements
3 to 35
Real estate property, net as of December 31, 2020 and 2019 includes the following (in millions):
20202019
Land$769.6 $768.8 
Buildings696.0 692.4 
Other property improvements84.1 79.0 
Subtotal1,549.7 1,540.2 
Accumulated depreciation(154.4)(127.5)
Real estate property, net$1,395.3 $1,412.7 
Other property, net, as of December 31, 2020 and 2019 was as follows (in millions):
20202019
Land$39.3 $38.4 
Buildings18.5 19.7 
Asphalt plants, machinery and equipment104.4 105.5 
Water, power and sewer systems19.7 30.6 
Other property improvements6.4 6.8 
Subtotal188.3 201.0 
Accumulated depreciation(77.5)(76.6)
Other property, net$110.8 $124.4