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Vehicle Rental Activities
 12 Months Ended
Dec. 31, 2021
Disclosure Components Of Companys Vehicles [Abstract]  
Vehicle Rental Activities Vehicle Rental Activities
The components of vehicles, net within assets under vehicle programs are as follows: 
As of December 31,
20212020
Rental vehicles$14,612 $9,210 
Less: Accumulated depreciation(1,911)(1,337)
12,701 7,873 
Vehicles held for sale165 280 
Vehicles, net$12,866 $8,153 
The components of vehicle depreciation and lease charges, net are summarized below:
Year Ended December 31,
202120202019
Depreciation expense$1,402 $1,330 $1,890 
Lease charges156 195 255 
(Gain) loss on sale of vehicles, net(361)(157)(82)
Vehicle depreciation and lease charges, net$1,197 $1,368 $2,063 

At December 31, 2021, 2020 and 2019, we had payables related to vehicle purchases included in liabilities under vehicle programs - other of $142 million, $232 million and $418 million, respectively, and receivables related to vehicle sales included in assets under vehicle programs - receivables from vehicle manufacturers and other of $134 million, $162 million and $576 million, respectively.