Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Details) - USD ($)	Feb. 29, 2024	Nov. 30, 2023
Variable Interest Entity [Line Items]
Financial instruments owned	$ 23,211,546,000	$ 21,747,473,000
Securities purchased under agreements to resell	7,546,785,000	5,950,549,000
Brokers, dealers and clearing organizations	3,008,327,000	2,380,732,000
Assets held for sale (includes pledged assets of $25,600 and $181,900 at fair value)	1,571,981,000	1,545,472,000
Other assets (includes assets pledged of $321,367 and $244,604)	3,215,855,000	2,650,640,000
Assets	60,933,000,000	57,905,161,000
Financial instruments sold, not yet purchased, at fair value	12,043,950,000	11,251,154,000
Other secured financings (includes $3,965 and $3,898 at fair value)	1,429,753,000	1,430,199,000
Liabilities held for sale	1,146,802,000	1,173,648,000
Long-term debt (includes $1,751,772 and $1,708,443 at fair value)	9,917,278,000	9,698,752,000
Liabilities	51,065,125,000	48,102,620,000
VIEs, primary beneficiary
Variable Interest Entity [Line Items]
Assets held for sale (includes pledged assets of $25,600 and $181,900 at fair value)	25,600	181,900
Other assets (includes assets pledged of $321,367 and $244,604)	321,367,000	244,604,000
VIEs, primary beneficiary | Secured Funding Vehicles
Variable Interest Entity [Line Items]
Cash	0	0
Financial instruments owned	0	0
Securities purchased under agreements to resell	1,671,000,000	1,677,700,000
Brokers, dealers and clearing organizations	0	0
Other receivables	0	0
Assets held for sale (includes pledged assets of $25,600 and $181,900 at fair value)	858,100,000	815,600,000
Other assets (includes assets pledged of $321,367 and $244,604)	0	0
Assets	2,529,100,000	2,493,300,000
Financial instruments sold, not yet purchased, at fair value	0	0
Other secured financings (includes $3,965 and $3,898 at fair value)	1,666,700,000	1,667,300,000
Liabilities held for sale	841,900,000	769,200,000
Other Liabilities	19,600,000	10,500,000
Long-term debt (includes $1,751,772 and $1,708,443 at fair value)	800,000	0
Liabilities	2,529,000,000	2,447,000,000
VIEs, primary beneficiary | Other
Variable Interest Entity [Line Items]
Cash	7,800,000	1,100,000
Financial instruments owned	8,700,000	7,800,000
Securities purchased under agreements to resell	0	0
Brokers, dealers and clearing organizations	20,100,000	18,000,000.0
Other receivables	3,000,000.0	0
Assets held for sale (includes pledged assets of $25,600 and $181,900 at fair value)	600,200,000	578,800,000
Other assets (includes assets pledged of $321,367 and $244,604)	139,000,000.0	147,900,000
Assets	778,800,000	753,600,000
Financial instruments sold, not yet purchased, at fair value	5,900,000	6,400,000
Other secured financings (includes $3,965 and $3,898 at fair value)	0	0
Liabilities held for sale	276,300,000	303,400,000
Other Liabilities	145,500,000	249,700,000
Long-term debt (includes $1,751,772 and $1,708,443 at fair value)	70,000,000.0	49,600,000
Liabilities	497,700,000	609,100,000
Variable Interest Entity, Assets, Eliminated In Consolidation
Variable Interest Entity [Line Items]
Assets held for sale (includes pledged assets of $25,600 and $181,900 at fair value)	31,900,000
Other assets (includes assets pledged of $321,367 and $244,604)	45,400,000	56,100,000
Variable Interest Entity, Liabilities, Eliminated In Consolidation
Variable Interest Entity [Line Items]
Other secured financings (includes $3,965 and $3,898 at fair value)	467,300,000	681,000,000
Liabilities held for sale		5,300,000
Other Liabilities	159,000,000	247,900,000
Consolidation, Eliminations
Variable Interest Entity [Line Items]
Brokers, dealers and clearing organizations	1,500,000	$ 1,400,000
Long-term debt (includes $1,751,772 and $1,708,443 at fair value)	$ 800,000