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Revenues from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 31, 2025 | Aug. 31, 2024 | Aug. 31, 2025 | Aug. 31, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ 1,504,162 | $ 1,283,913 | $ 3,875,528 | $ 3,412,945
Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,406,091 | 1,195,818 | 3,549,492 | 3,129,781
Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 98,071 | 88,095 | 326,036 | 283,164
Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,078,060 | 910,235 | 2,724,602 | 2,444,756
Americas | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,038,469 | 885,377 | 2,575,418 | 2,351,130
Americas | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 39,591 | 24,858 | 149,184 | 93,626
Europe and the Middle East |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 309,927 | 285,878 | 838,065 | 705,645
Europe and the Middle East | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 252,336 | 223,570 | 663,986 | 518,916
Europe and the Middle East | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 57,591 | 62,308 | 174,079 | 186,729
Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 116,175 | 87,800 | 312,861 | 262,544
Asia-Pacific | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 115,286 | 86,871 | 310,088 | 259,735
Asia-Pacific | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 889 | 929 | 2,773 | 2,809
Investment banking - Advisory |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 655,578 | 592,462 | 1,511,218 | 1,214,927
Investment banking - Advisory | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 655,578 | 592,462 | 1,511,218 | 1,214,927
Investment banking - Advisory | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Investment banking - Underwriting |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 430,730 | 333,173 | 1,086,341 | 1,128,356
Investment banking - Underwriting | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 430,730 | 333,173 | 1,086,341 | 1,128,356
Investment banking - Underwriting | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Equities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 318,319 | 267,697 | 946,549 | 779,462
Equities | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 318,319 | 267,697 | 946,549 | 779,462
Equities | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Fixed income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,464 | 2,486 | 5,384 | 7,036
Fixed income | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,464 | 2,486 | 5,384 | 7,036
Fixed income | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Asset management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 8,236 | 7,189 | 61,539 | 43,539
Asset management | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Asset management | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 8,236 | 7,189 | 61,539 | 43,539
Other investments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 89,835 | 80,906 | 264,497 | 239,625
Other investments | Investment Banking and Capital Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Other investments | Asset Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ 89,835 | $ 80,906 | $ 264,497 | $ 239,625

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