Property and Equipment—Net

9 Months Ended

Sep. 30, 2020

Property, Plant and Equipment [Abstract]

Property and equipment—net consisted of the following (in millions):


	September 30, 2020		December 31, 2019
Land	$	93.3	$	93.3
Building and building improvements	148.1		147.4
Computer equipment and software	131.5		116.7
Leasehold improvements	30.3		25.5
Evaluation units	18.8		19.9
Furniture and fixtures	20.0		17.3
Construction-in-progress	140.8		61.2
Total property and equipment	582.8		481.3
Less: accumulated depreciation	(163.4)		(137.0)
Property and equipment—net	$	419.4	$	344.3

Construction-in-progress consists primarily of costs incurred in connection with the construction of a second building at our headquarters campus.

Depreciation expense was $13.9 million and $12.8 million during the three months ended September 30, 2020 and September 30, 2019, respectively. Depreciation expense was $41.6 million and $37.8 million during the nine months ended September 30, 2020 and September 30, 2019, respectively.