Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property and Equipment

	2021		2020
Land	$	732	$	740
Landfills		17,734		16,842
Vehicles (a)		5,893		5,800
Machinery and equipment (a)		3,571		3,217
Containers (a)		2,807		2,694
Buildings and improvements (a)		3,542		3,463
Furniture, fixtures and office equipment (a)		677		729
		34,956		33,485
Less: Accumulated depreciation of tangible property and equipment (a)		(10,147)		(9,645)
Less: Accumulated amortization of landfill airspace		(10,390)		(9,692)
Property and equipment, net	$	14,419	$	14,148

(a) In our Annual Report on Form 10-K for the year ended December 31, 2020, our accumulated depreciation and gross property and equipment balances as of December 31, 2020 were overstated. We subsequently corrected the balances in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2021 and have provided the corrected balances in all filings thereafter, as discussed in Note 1.

Depreciation and Amortization Expense Including Amortization Expense for Assets Recorded as Capital Leases

Depreciation and amortization expense, including amortization expense for assets recorded as financing leases, consisted of the following for the year ended December 31 (in millions):

	2021		2020		2019
Depreciation of tangible property and equipment	$	1,125	$	996	$	893
Amortization of landfill airspace		731		568		575
Depreciation and amortization expense	$	1,856	$	1,564	$	1,468