CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Cash flows from operating activities:
Net income	$ 1,333,251	$ 2,235,810	$ 1,218,125
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	660,430	295,065	247,120
Reduction of operating lease right-of-use assets	117,273	97,273	97,705
Amortization of capitalized costs to obtain revenue contracts	53,237	73,587	82,190
Stock-based compensation	893,294	692,316	563,292
Allowance for credit losses	50,891	19,724	19,932
(Gain) loss on sale of strategic investments	3,635	(55,077)	0
Gain on sale of building	(51,385)	(1,906)	0
Gain on divestitures, net of transaction costs	(508,044)	(868,830)	0
Deferred income taxes	(470,693)	(407,649)	(211,045)
Other	(888)	611	13,295
Net changes in operating assets and liabilities, net of effects from acquisitions and dispositions:
Accounts receivable	(174,140)	(103,460)	(178,432)
Inventories	(22,517)	(51,449)	(123,752)
Prepaid and other current assets	66,918	(410,432)	(106,396)
Other long-term assets	(481,376)	(168,255)	(100,618)
Accounts payable and accrued liabilities	(13,487)	187,564	170,496
Operating lease liabilities	(113,603)	(96,966)	(73,281)
Income taxes	6,351	(73,215)	198,078
Deferred revenue	235,261	8,641	(113,435)
Unrealized loss on settlement of interest rate treasury lock	(121,643)	0	0
Net cash provided by operating activities	1,518,608	1,407,029	1,703,274
Cash flows from investing activities:
Proceeds from maturities of short-term investments	58,016	126,703	127,128
Proceeds from sales of short-term investments	157,204	12,258	3,307
Purchases of short-term investments	(65,708)	(136,821)	(131,079)
Proceeds from sales of strategic investments	3,566	55,696	8,492
Purchases of strategic investments	(4,100)	(1,293)	(435)
Purchases of property and equipment, net	(169,454)	(139,500)	(189,618)
Proceeds from sale of building	74,279	16,339	0
Acquisitions, net of cash acquired	(16,681,257)	(156,947)	(297,692)
Proceeds from business divestitures, net of cash divested	746,550	1,446,578	0
Capitalization of software development costs	0	0	(2,204)
Other	(365)	0	0
Net cash provided by (used in) investing activities	(15,881,269)	1,223,013	(482,101)
Cash flows from financing activities:
Proceeds from debt, net of issuance costs	14,329,340	0	0
Repayment of debt	(863,637)	(2,607)	(2,603)
Payment of bridge financing and term loan costs	0	(72,265)	0
Issuances of common stock	228,418	232,212	252,986
Payments for taxes related to net share settlement of equity awards	(305,501)	(337,541)	(241,408)
Purchase of equity forward contract	0	0	(45,000)
Purchases of treasury stock	0	0	(1,160,724)
Redemption of redeemable non-controlling interest	(30,000)	0	0
Other	(2,863)	(1,096)	(122)
Net cash provided by (used in) financing activities	13,355,757	(181,297)	(1,196,871)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,896	8,797	(2,979)
Net change in cash, cash equivalents and restricted cash	(1,005,008)	2,457,542	21,323
Cash, cash equivalents and restricted cash, beginning of year, including cash from discontinued operations	3,898,729	1,441,187	1,419,864
Cash, cash equivalents and restricted cash, end of year, including cash from discontinued operations	2,893,721	3,898,729	1,441,187
Cash, cash equivalents and restricted cash, including cash from discontinued operations	2,893,721	3,898,729	1,441,187
Less: Cash, cash equivalents and restricted cash from discontinued operations	0	0	4,947
Cash, cash equivalents and restricted cash from continuing operations	2,893,721	3,898,729	1,436,240
Supplemental disclosure of cash flow information:
Cash paid for income taxes during the year:	512,705	680,064	97,956
Interest payments during the year:	353,773	814	996
Non-cash activities:
Issuance of common stock for the acquisition of Ansys	17,105,538	0	0
Fair value of replacement equity awards in connection with the acquisition of Ansys	130,963	0	0
Purchase of property and equipment included in accounts payable	24,314	32,014	21,672
Conversion of notes receivable to non-marketable equity securities	0	0	2,000
Contingent consideration receivable in connection with divestiture	0	22,202	0
Bridge Commitment
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of bridge financing costs/debt issuance costs	41,996	33,677	0
Other Debt Instruments
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of bridge financing costs/debt issuance costs	$ 13,847	$ 0	$ 0