Property and Equipment, Net

Property and equipment, net consisted of the following:



	As of December 31,
	2018			2017
Building	$	—		$	36.6
Datacenter and other computer equipment	695.3			663.1
Furniture and fixtures	23.8			21.2
Leasehold improvements	122.6			118.6
Construction in process	32.8			7.2
Total property and equipment	874.5			846.7
Accumulated depreciation and amortization	(563.9		)	(504.8		)
Property and equipment, net	$	310.6		$	341.9

As described in Note 1, "Description of the Business and Summary of Significant Accounting Policies", the Company terminated its master lease for its previous corporate headquarters in September 2018. The termination resulted in de-recognizing the gross building asset of $36.6 million, related accumulated depreciation of $12.2 million, and an imputed financing obligation of $25.5 million, of which $2.8 million was included in accrued and other current liabilities and $22.7 million was included in other non-current liabilities. The Company recorded the difference between the net asset and liability that were de-recognized to other income, net during the year ended December 31, 2018.

The Company leases certain infrastructure from various third parties, including from a former related party, through equipment financing leases under capital leases. See Note 14, “Related Party Transactions” for additional details. Infrastructure assets as of December 31, 2018 and 2017, respectively, included a total of $362.8 million and $417.9 million acquired under capital lease agreements. These leases are capitalized in property and equipment, and the related amortization of assets under capital leases is included in depreciation and amortization expense. The accumulated amortization of the infrastructure assets under capital leases totaled $211.7 million and $259.0 million as of December 31, 2018 and 2017, respectively.

Construction in process includes costs primarily related to construction of leasehold improvements for office buildings and datacenters, and as of December 31, 2018, primarily relates to costs incurred related to our new corporate headquarters.

Depreciation expense related to property and equipment was $158.6 million, $170.7 million, and $173.8 million for the years ended December 31, 2018, 2017, and 2016, respectively.