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Gain on Sales of Real Estate
 12 Months Ended
Dec. 31, 2019
Real Estate [Abstract]  
Gain on Sales of Real Estate Gain on Sales of Real Estate
 
The following table summarizes our properties sold during the periods indicated below (dollars in millions):
 
Year Ended December 31,
 
2019

 
2018

 
2017

Number of properties
93

 
128

 
59

Net sales proceeds
$
108.9

 
$
142.3

 
$
167.0

Gain on sales of real estate
$
30.0

 
$
24.6

 
$
40.9



These property sales do not represent a strategic shift that will have a major effect on our operations and financial results, and therefore do not require presentation as discontinued operations.