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Segment Reporting - Assets by Reportable Business Segment (Details) - USD ($) $ in Thousands	Feb. 28, 2026	Nov. 30, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 74,380,490	$ 76,012,347
Investment Banking and Capital Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	68,934,900	70,335,500
Asset Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 5,445,600	$ 5,676,800

X

- Definition

Amount of asset recognized for present right to economic benefit.

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