Commitments, Contingencies and Guarantees - Commitments and Contingencies (Details) $ in Millions	3 Months Ended
Feb. 28, 2026 USD ($)
Commitments And Guarantee Obligations [Line Items]
2026	$ 12,233.3
2027	1,884.7
2028 and 2029	1,364.0
2030 and 2031	137.8
2032 and Later	149.2
Maximum Payout	$ 15,769.0
Repurchase obligation settlement period	3 days
Equity commitments
Commitments And Guarantee Obligations [Line Items]
2026	$ 14.1
2027	115.6
2028 and 2029	0.0
2030 and 2031	0.1
2032 and Later	123.9
Maximum Payout	253.7
Loan commitments
Commitments And Guarantee Obligations [Line Items]
2026	85.6
2027	252.5
2028 and 2029	88.0
2030 and 2031	137.7
2032 and Later	8.8
Maximum Payout	572.6
Loan purchase commitments
Commitments And Guarantee Obligations [Line Items]
2026	3,607.5
2027	0.0
2028 and 2029	0.0
2030 and 2031	0.0
2032 and Later	0.0
Maximum Payout	3,607.5
Forward starting reverse repos
Commitments And Guarantee Obligations [Line Items]
2026	4,970.2
2027	0.0
2028 and 2029	0.0
2030 and 2031	0.0
2032 and Later	0.0
Maximum Payout	4,970.2
Forward starting repos
Commitments And Guarantee Obligations [Line Items]
2026	3,421.7
2027	0.0
2028 and 2029	0.0
2030 and 2031	0.0
2032 and Later	0.0
Maximum Payout	3,421.7
Other unfunded commitments
Commitments And Guarantee Obligations [Line Items]
2026	134.2
2027	1,516.6
2028 and 2029	1,276.0
2030 and 2031	0.0
2032 and Later	16.5
Maximum Payout	2,943.3
Back-to-back committed sales contracts
Commitments And Guarantee Obligations [Line Items]
Maximum Payout	$ 3,290.0

Commitments and guarantee obligations.

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- Definition

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

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