Commitments, Contingencies and Guarantees - Commitments and Contingencies (Details)
$ in Millions
6 Months Ended
May 31, 2022
USD ($)
Guarantor Obligations [Line Items]  
2022 $ 16,776.0
2023 403.9
2024 and 2025 348.5
2026 and 2027 75.2
2028 and Later 168.3
Maximum Payout $ 17,771.9
Guarantor obligation settled period 3 days
Equity commitments  
Guarantor Obligations [Line Items]  
2022 $ 292.6
2023 27.3
2024 and 2025 2.4
2026 and 2027 5.2
2028 and Later 168.3
Maximum Payout 495.8
Loan commitments  
Guarantor Obligations [Line Items]  
2022 4.0
2023 267.6
2024 and 2025 0.0
2026 and 2027 70.0
2028 and Later 0.0
Maximum Payout 341.6
Underwriting commitments  
Guarantor Obligations [Line Items]  
2022 72.3
2023 0.0
2024 and 2025 0.0
2026 and 2027 0.0
2028 and Later 0.0
Maximum Payout 72.3
Forward starting reverse repos  
Guarantor Obligations [Line Items]  
2022 10,774.6
2023 0.0
2024 and 2025 0.0
2026 and 2027 0.0
2028 and Later 0.0
Maximum Payout 10,774.6
Forward starting repos  
Guarantor Obligations [Line Items]  
2022 5,632.5
2023 0.0
2024 and 2025 0.0
2026 and 2027 0.0
2028 and Later 0.0
Maximum Payout 5,632.5
Other unfunded commitments  
Guarantor Obligations [Line Items]  
2022 0.0
2023 109.0
2024 and 2025 346.1
2026 and 2027 0.0
2028 and Later 0.0
Maximum Payout 455.1
Forward starting securities purchased under agreements to resell settled  
Guarantor Obligations [Line Items]  
Maximum Payout 5.7
Forward starting securities sold under agreements to resell settled  
Guarantor Obligations [Line Items]  
Maximum Payout $ 3.6