Property and Equipment—Net

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

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


	December 31, 2021		December 31, 2020
Land	$	204.5	$	93.3
Buildings and improvements	416.2		150.6
Computer equipment and software	176.1		137.2
Leasehold improvements	40.1		31.9
Evaluation units	15.6		19.8
Furniture and fixtures	26.9		21.3
Construction-in-progress	19.9		166.4
Total property and equipment	899.3		620.5
Less: accumulated depreciation	(211.7)		(172.5)
Property and equipment—net	$	687.6	$	448.0

We completed construction of a second building at our headquarters campus and it has been placed in service as of June 30, 2021. In conjunction with the completion of the building, we evaluated the range of useful lives of our property and equipment. The range of useful lives for buildings and improvements is now two to forty years, an increase from two to thirty years, and for furniture and fixtures the range is now three to eight years, an increase from three to five years.

During 2021, we purchased certain real estate in the United States, Canada and France totaling $180.9 million. The purchases were accounted for under the asset acquisition method. The cost of the assets acquired was allocated to land, buildings, and construction-in-progress based on their relative fair values. The amounts allocated to land, buildings, and construction-in-progress were $111.1 million, $68.9 million and $0.9 million, respectively.

Depreciation expense was $65.9 million, $55.5 million and $50.7 million in 2021, 2020 and 2019, respectively.