Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Details) - USD ($)	Aug. 31, 2024	Nov. 30, 2023
Variable Interest Entity [Line Items]
Financial instruments owned	$ 24,038,659,000	$ 21,747,473,000
Securities purchased under agreements to resell	6,993,024,000	5,950,549,000
Receivables from brokers	2,583,719,000	2,380,732,000
Assets held for sale	0	1,545,472,000
Other assets	3,263,629,000	2,650,640,000
Total assets	63,275,098,000	57,905,161,000
Financial instruments sold, not yet purchased	12,307,086,000	11,251,154,000
Other secured financings	1,739,323,000	1,430,199,000
Liabilities held for sale	0	1,173,648,000
Long-term debt	12,922,012,000	9,698,752,000
Total liabilities	53,159,331,000	48,102,620,000
VIEs, primary beneficiary
Variable Interest Entity [Line Items]
Assets held for sale		181,900
Other assets	365,942,000	244,604,000
VIEs, primary beneficiary | Secured Funding Vehicles
Variable Interest Entity [Line Items]
Cash	0	0
Financial instruments owned	65,000,000.0	0
Securities purchased under agreements to resell	2,283,000,000	1,677,700,000
Receivables from brokers	0	0
Other receivables	2,000,000.0
Assets held for sale		815,600,000
Other assets	0	0
Total assets	2,350,000,000	2,493,300,000
Financial instruments sold, not yet purchased	0	0
Other secured financings	2,343,000,000	1,667,300,000
Liabilities held for sale		769,200,000
Other Liabilities	7,100,000	10,500,000
Long-term debt	0	0
Total liabilities	2,350,100,000	2,447,000,000
VIEs, primary beneficiary | Other
Variable Interest Entity [Line Items]
Cash	2,800,000	1,100,000
Financial instruments owned	12,900,000	7,800,000
Securities purchased under agreements to resell	0	0
Receivables from brokers	17,800,000	18,000,000.0
Other receivables	3,000,000.0
Assets held for sale		578,800,000
Other assets	91,000,000.0	147,900,000
Total assets	127,500,000	753,600,000
Financial instruments sold, not yet purchased	7,600,000	6,400,000
Other secured financings	0	0
Liabilities held for sale		303,400,000
Other Liabilities	18,900,000	249,700,000
Long-term debt	70,000,000.0	49,600,000
Total liabilities	96,500,000	609,100,000
Consolidation, Eliminations
Variable Interest Entity [Line Items]
Receivables from brokers	1,500,000	1,400,000
Variable Interest Entity, Assets, Eliminated In Consolidation
Variable Interest Entity [Line Items]
Assets held for sale		31,900,000
Other assets	3,300,000	56,100,000
Variable Interest Entity, Liabilities, Eliminated In Consolidation
Variable Interest Entity [Line Items]
Other secured financings	642,600,000	681,000,000.0
Liabilities held for sale		5,300,000
Other Liabilities	$ 18,700,000	$ 247,900,000