The components of property and equipment, net were as follows (in millions):


	As of December 31,
	2022		2023
Land	$	65	$	65
Building and site improvements	739		739
Leasehold improvements	609		658
Computer equipment	529		542
Leased computer equipment	712		683
Leased vehicles	11		2
Internal-use software	389		488
Furniture and fixtures	94		94
Construction in progress	219		203
Total	3,367		3,474
Less: Accumulated depreciation and amortization	(1,285)		(1,401)
Property and equipment, net	$	2,082	$	2,073

Amounts in construction in progress represent buildings, leasehold improvements, assets under construction, and other assets not placed in service.

Depreciation expense relating to property and equipment was $393 million, $346 million, and $355 million for the years ended December 31, 2021, 2022 and 2023, respectively. Included in these amounts were depreciation expense for leased computer equipment in the amount of $217 million, $186 million, and $187 million for the years ended December 31, 2021, 2022 and 2023, respectively. Accumulated depreciation and amortization included $305 million and $250 million of leased computer equipment depreciation as of December 31, 2022 and 2023, respectively.

Amortization of capitalized software development costs was not material for the years ended December 31, 2021, 2022 and 2023.