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Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Details)	9 Months Ended	12 Months Ended
	Aug. 31, 2025 USD ($) $ / shares	Nov. 30, 2024 USD ($) $ / shares
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability | $	$ 1,253,276,000	$ 710,314,000
Other secured financings | $	611,903,000	24,848,000
Long-term debt | $	3,564,534,000	2,351,346,000
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability | $	44,683,000	25,045,000
Other secured financings | $	16,114,000	14,884,000
Long-term debt | $	1,071,164,000	821,903,000
Level 3 | Non-exchange-traded securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	272,309,000	239,364,000
Level 3 | Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	34,380,000	24,931,000
Level 3 | CDOs and CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	$ 34,377,000	$ 53,388,000
Level 3 | CDOs and CLOs | Constant prepayment rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.20	0.20
Level 3 | CDOs and CLOs | Constant default rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.02	0.02
Level 3 | CDOs and CLOs | Loss severity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.30	0.30
Level 3 | Residential mortgage-backed securities | Discounted Cash Flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	$ 7,978,000	$ 7,714,000
Level 3 | Residential mortgage-backed securities | Constant prepayment rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.12	0.20
Level 3 | Residential mortgage-backed securities | Constant default rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.003
Level 3 | Residential mortgage-backed securities | Loss severity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.20	0.10
Level 3 | Residential mortgage-backed securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.14	0.12
Level 3 | Other ABS | Discounted Cash Flows, Market Approach, Scenario Analysis
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	$ 122,633,000	$ 98,172,000
Level 3 | Other ABS | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.79	0.92
Level 3 | Loans and other receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	$ 139,922,000	$ 152,586,000
Level 3 | Embedded options | Basis points upfront
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input		0.3
Level 3 | Investments at fair value | Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned | $	$ 155,554,000	$ 132,769,000
Level 3 | Private equity securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input		0.28
Level 3 | Private equity securities | Estimated revenue
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input | $	29,763,576	29,908,372
Level 3 | Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability | $	$ 1,966,000	$ 16,864,000
Level 3 | Loans | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input | $	100
Level 3 | Equity options
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability | $	$ 4,323,000	$ 1,396,000
Level 3 | Equity options | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input	0.34
Level 3 | Other secured financings: | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input		117
Level 3 | Long-term debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt | $	$ 1,071,164,000	$ 821,903,000
Minimum | Level 3 | Non-exchange-traded securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0	0
Minimum | Level 3 | Non-exchange-traded securities | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.30
Minimum | Level 3 | Corporate debt securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	49	28
Minimum | Level 3 | Corporate debt securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.17
Minimum | Level 3 | CDOs and CLOs | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	98	70
Minimum | Level 3 | CDOs and CLOs | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.13	0.14
Minimum | Level 3 | Other ABS | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	117	106
Minimum | Level 3 | Other ABS | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.14	0.19
Minimum | Level 3 | Other ABS | Cumulative loss rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.13	0.17
Minimum | Level 3 | Other ABS | Duration (years)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input, term	18 days	10 months 24 days
Minimum | Level 3 | Loans and other receivables | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	6	17
Minimum | Level 3 | Loans and other receivables | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.08	0.03
Minimum | Level 3 | Embedded options | Basis points upfront
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input	0.0
Derivative liability, measurement input	0.0	8.0
Minimum | Level 3 | Private equity securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0	1
Minimum | Level 3 | Private equity securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.16
Minimum | Level 3 | Loans | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input | $		17
Minimum | Level 3 | Loans | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input		0
Minimum | Level 3 | Equity options | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input	0.28	0.28
Minimum | Level 3 | Other secured financings: | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	114
Minimum | Level 3 | Other secured financings: | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	0.76	0.60
Minimum | Level 3 | Long-term debt | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input	70	61
Maximum | Level 3 | Non-exchange-traded securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	486	486
Maximum | Level 3 | Non-exchange-traded securities | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.34
Maximum | Level 3 | Corporate debt securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	119	105
Maximum | Level 3 | Corporate debt securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.20
Maximum | Level 3 | CDOs and CLOs | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	100	106
Maximum | Level 3 | CDOs and CLOs | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.17	0.32
Maximum | Level 3 | Other ABS | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	135	127
Maximum | Level 3 | Other ABS | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.28	0.30
Maximum | Level 3 | Other ABS | Cumulative loss rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.15	0.34
Maximum | Level 3 | Other ABS | Duration (years)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input, term	1 year 2 months 12 days	1 year
Maximum | Level 3 | Loans and other receivables | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	117	106
Maximum | Level 3 | Loans and other receivables | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	2.56	2.52
Maximum | Level 3 | Embedded options | Basis points upfront
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input	0.4
Derivative liability, measurement input	22.6	22.3
Maximum | Level 3 | Private equity securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	10,956	8,506
Maximum | Level 3 | Private equity securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.28
Maximum | Level 3 | Loans | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input | $		100
Maximum | Level 3 | Loans | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input		2.05
Maximum | Level 3 | Equity options | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input	0.72	1.02
Maximum | Level 3 | Other secured financings: | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	118
Maximum | Level 3 | Other secured financings: | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	1	1
Maximum | Level 3 | Long-term debt | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input	122	122
Weighted Average | Level 3 | Non-exchange-traded securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	71	68
Weighted Average | Level 3 | Non-exchange-traded securities | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.33
Weighted Average | Level 3 | Corporate debt securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	71	74
Weighted Average | Level 3 | Corporate debt securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.18
Weighted Average | Level 3 | CDOs and CLOs | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	99	94
Weighted Average | Level 3 | CDOs and CLOs | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.16	0.26
Weighted Average | Level 3 | Other ABS | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	132	121
Weighted Average | Level 3 | Other ABS | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.16	0.25
Weighted Average | Level 3 | Other ABS | Cumulative loss rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.14	0.24
Weighted Average | Level 3 | Other ABS | Duration (years)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input, term	1 year 1 month 6 days	27 days
Weighted Average | Level 3 | Loans and other receivables | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	101	75
Weighted Average | Level 3 | Loans and other receivables | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.50	0.50
Weighted Average | Level 3 | Embedded options | Basis points upfront
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input	0.4
Derivative liability, measurement input	14.5	14.9
Weighted Average | Level 3 | Private equity securities | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	1,641	501
Weighted Average | Level 3 | Private equity securities | Discount rate/yield
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.28
Weighted Average | Level 3 | Loans | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input | $	0	75
Weighted Average | Level 3 | Loans | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments sold, not yet purchased, measurement input		0.50
Weighted Average | Level 3 | Equity options | Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input	0.61	0.49
Weighted Average | Level 3 | Other secured financings: | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	116
Weighted Average | Level 3 | Other secured financings: | Estimated recovery percentage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financings, measurement input	0.96	0.93
Weighted Average | Level 3 | Long-term debt | Price
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input	102	96

X

- Definition

Collateralized Financings, Measurement Input

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- Definition

Financial Instruments, Owned, Measurement Input

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- Definition

Value of input used to measure derivative asset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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