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Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Leases [Abstract]
Renewal term	40 years
Cost of the leased space	$ 51.2	$ 55.5
Accumulated depreciation of leased assets	2.8	1.9
Rental income	$ 14.8	$ 14.8
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Service revenues and vehicle sales	Service revenues and vehicle sales

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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Indicates line item in statement of comprehensive income that includes operating lease income.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount of accumulated depreciation of lessor's underlying asset for which right to use has been conveyed to lessee under operating lease.

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Amount, before accumulated depreciation, of lessor's underlying asset for which right to use has been conveyed to lessee under operating lease.

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