| Oct 31,
2010 | Oct 31,
2011 | Oct 31,
2012 | Oct 31,
2013 | Oct 31,
2014 | Oct 31,
2015 | Oct 31,
2016 | Oct 31,
2017 | Oct 31,
2018 | Oct 31,
2019 | Oct 31,
2020 | Oct 31,
2021 | Oct 31,
2022 | Oct 31,
2023 | Oct 31,
2024 |
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| Net income from consolidated operations | 72 | 95 | 107 | 125 | 139 | 154 | 176 | 208 | 286 | 360 | 336 | 330 | 391 | 444 | 559 |
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| Depreciation and amortization | 18 | 19 | 31 | 37 | 48 | 48 | 60 | 65 | 77 | 83 | 89 | 93 | 96 | 130 | 175 |
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| Share-based compensation expense | 1 | 3 | 4 | 5 | 6 | 6 | 6 | 7 | 9 | 10 | 10 | 9 | 13 | 15 | 19 |
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| Employer contributions to HEICO Savings and Investment Plan | - | - | - | - | 6 | 6 | 7 | 8 | 8 | 10 | 10 | 10 | 12 | 15 | 18 |
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| Impairment of Intangible Assets | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 8 |
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| Deferred Income Tax Expense (Benefit) | 2 | 29,000 | -3 | -6 | -17 | -7 | -9 | -11 | -13 | -6 | -6 | -16 | 9 | -27 | -22 |
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| Change in accrued contingent consideration | - | - | - | -2 | -28 | 0 | 3 | 1 | - | 3 | 1 | 1 | -8 | -1 | -10 |
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| Payment for Contingent Consideration Liability, Operating Activities | - | - | - | - | - | - | - | - | - | - | - | - | - | 6 | 6 |
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| Amendment and termination of contingent consideration agreement | - | - | - | - | - | - | - | - | - | - | - | - | - | 9 | - |
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| Accounts receivable | 11 | 5 | -6 | 17 | -7 | 23 | 16 | -3 | 29 | 29 | -72 | 27 | 29 | 66 | 21 |
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| Contract assets | - | - | - | - | - | - | - | - | - | -12 | 16 | -0 | 4 | 12 | -1 |
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| Inventories | -6,359,000 | 9 | -7 | 15 | -0 | 10 | 14 | 21 | 49 | 30 | 28 | 10 | 89 | 125 | 133 |
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| Prepaid expenses and other current assets | -549,000 | 343,000 | -1 | 5 | -8 | -1 | 2 | -0 | -0 | -1 | -2 | 5 | 10 | -6 | 23 |
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| Trade accounts payable | 125,000 | 7 | 4 | -0 | 3 | 3 | 4 | 6 | 17 | -4 | -30 | 7 | 26 | 11 | -10 |
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| Increase (Decrease) in Accrued Liabilities | 11 | 10 | 5 | 13 | -3 | -1 | 35 | 2 | 22 | 17 | -38 | 34 | 34 | 73 | 22 |
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| Income taxes payable | -1,196,000 | 2 | 2 | -7 | 1 | 0 | 1 | 6 | -13 | 1 | -10 | 3 | 12 | -5 | 20 |
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| Change in long-term liabilities and assets related to HEICO LCP | - | - | - | - | - | - | - | - | 12 | 13 | 15 | 13 | 15 | 14 | 22 |
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| Other | - | - | - | - | -5 | 2 | 2 | 2 | -1 | -0 | -4 | -2 | -1 | 10 | -54 |
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| Net cash provided by operating activities | 102 | 126 | 139 | - | - | - | - | 275 | 328 | 437 | 409 | 444 | 468 | 449 | 672 |
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| Acquisitions, net of cash acquired | 39 | 95 | 197 | 223 | 9 | 167 | 264 | 418 | 60 | 241 | 164 | 137 | 347 | 2,422 | 219 |
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| Capital expenditures | 9 | 9 | 15 | 18 | 16 | 18 | 31 | 26 | 42 | 29 | 23 | 36 | 32 | 49 | 58 |
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| Net Investment Related to HEICO LCP | - | - | - | - | - | - | - | - | 12 | 14 | 16 | 14 | 15 | 19 | 20 |
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| Other | 325,000 | -201,000 | 0 | 0 | 0 | 1 | 3 | 1 | 0 | -3 | -4 | -3 | 1 | -6 | -4 |
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| Net cash used in investing activities | -48,263,000 | -103,900,000 | -213 | - | - | - | - | -445 | -114 | -281 | -199 | -183 | -396 | -2,484 | -293 |
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| Payments on revolving credit facility | 78 | 50 | 100 | 126 | 159 | 132 | 170 | 191 | 204 | 283 | 68 | 505 | 212 | 989 | 365 |
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| Proceeds from Issuance of Senior Long-Term Debt | - | - | - | - | - | - | - | - | - | - | - | - | - | 1,189 | - |
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| Borrowings on revolving credit facility | 37 | 72 | 191 | 372 | 112 | 174 | 260 | 404 | 56 | 313 | 245 | - | 262 | 1,964 | 130 |
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| Distributions to noncontrolling interests | - | 15 | 9 | 8 | 79 | 10 | 19 | 18 | 13 | 111 | 18 | 28 | 25 | 37 | 34 |
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| Redemption of common stock related to stop option exercises | 681,000 | 14 | 0 | 2 | 0 | 0 | - | - | 25 | 64 | 12 | 4 | 26 | 15 | 30 |
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| Cash dividends paid | 4 | 4 | 6 | 120 | 31 | 9 | 11 | 13 | 15 | 19 | 22 | 23 | 24 | 27 | 29 |
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| Acquisitions of noncontrolling interests | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | 27 |
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| Payment for Contingent Consideration Liability, Financing Activities | - | - | - | - | - | - | - | - | - | - | - | - | - | 13 | 25 |
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| Payments on short-term debt, net | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 14 |
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| Debt issuance costs | - | - | 3 | 1 | 1 | - | - | 0 | 4 | - | - | 1 | 1 | 10 | - |
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| Proceeds from stock option exercises | 2 | 2 | 1 | 0 | 1 | 4 | 6 | 6 | 4 | 9 | 7 | 5 | 2 | 7 | 8 |
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| Other | -294,000 | -256,000 | 0 | -0 | -1 | -0 | -0 | -1 | -1 | -1 | -1 | -1 | -1 | -2 | -4 |
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| Net cash (used in) provided by financing activities | -54,192,000 | -10,669,000 | 78 | - | - | - | - | 176 | -208 | -160 | 138 | -559 | -34 | 2,065 | -389 |
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| Effect of exchange rate changes on cash | - | - | - | - | - | - | - | - | - | - | - | - | -7 | 2 | 1 |
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| Net increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | - | -3 | 350 | -299 | 31 | 32 | -9 |
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