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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Statement of Cash Flows [Abstract]    
Net Income (Loss) Attributable to Parent $ 680,521 $ 534,374
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization, including debt cost 93,141 76,756
Allowance for credit loss (1,429) 1,332
Equity in (earnings) losses of unconsolidated affiliates (2,121) 1,918
Stock-based compensation 27,145 17,229
Gain on sale of property and equipment (1,257) (1,745)
Deferred income taxes (14,130) 9,265
Changes in operating assets and liabilities:    
Accounts receivable (81,593) 19,102
Vehicle pooling costs (12,777) 661
Inventories (18,788) 1,209
Prepaid expenses and other current and non-current assets 6,879 6,268
Operating lease right-of-use assets and lease liabilities (389) 221
Accounts payable and accrued liabilities 47,914 (15,636)
Deferred revenue 8,467 1,365
Income taxes receivable 16,152 (12,076)
Income taxes payable 13,692 9,168
Other liabilities 0 1,999
Net Cash Provided by (Used in) Operating Activities 762,205 650,968
Cash flows from investing activities:    
Purchases of property and equipment (364,395) (487,730)
Proceeds from sale of property and equipment 599 2,153
Payments to Acquire Businesses, Net of Cash Acquired 0 3,268
Net Cash Provided by (Used in) Investing Activities (363,796) (488,845)
Cash flows from financing activities:    
Proceeds from the exercise of stock options 28,829 55,656
Proceeds from the issuance of Employee Stock Purchase Plan shares 4,880 3,955
Payments for employee stock-based tax withholdings 938 102,191
Payments of finance lease obligations (962) 0
Net Cash Provided by (Used in) Financing Activities 31,809 (42,580)
Effect of foreign currency translation 3,954 525
Net increase in cash, cash equivalents, and restricted cash 434,172 120,068
Cash, cash equivalents, and restricted cash at beginning of period 477,718 186,319
Cash, cash equivalents, and restricted cash at end of period 911,890 306,387
Supplemental disclosure of cash flow information:    
Interest Paid, Excluding Capitalized Interest, Operating Activities 14,736 14,514
Income taxes paid, net of refunds $ 126,303 $ 59,302