Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	$ 1,163,316	$ 1,020,149	$ 2,310,145	$ 2,040,565
Service revenues
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	991,281	861,745	1,977,617	1,721,281
Service revenues | United States | United States
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	868,130	756,036	1,728,120	1,518,561
Service revenues | International | International
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	123,151	105,709	249,497	202,720
Vehicle sales
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	172,035	158,404	332,528	319,284
Vehicle sales | United States | United States
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	106,715	74,690	194,265	153,072
Vehicle sales | International | International
Disaggregation of Revenue [Line Items]
Total service revenues and vehicle sales	$ 65,320	$ 83,714	$ 138,263	$ 166,212