Commitments, Contingencies and Guarantees - Commitments and Contingencies (Details) $ in Millions	Nov. 30, 2021 USD ($)
Commitments And Guarantee Obligations [Line Items]
2022	$ 12,951.9
2023	598.3
2024 and 2025	5.4
2026 and 2027	60.0
2028 and Later	0.8
Maximum Payout	13,616.4
Equity commitments
Commitments And Guarantee Obligations [Line Items]
2022	255.6
2023	2.0
2024 and 2025	0.0
2026 and 2027	0.0
2028 and Later	0.8
Maximum Payout	258.4
Loan commitments
Commitments And Guarantee Obligations [Line Items]
2022	250.0
2023	25.0
2024 and 2025	0.0
2026 and 2027	60.0
2028 and Later	0.0
Maximum Payout	335.0
Underwriting commitments
Commitments And Guarantee Obligations [Line Items]
2022	167.0
2023	0.0
2024 and 2025	0.0
2026 and 2027	0.0
2028 and Later	0.0
Maximum Payout	167.0
Forward starting reverse repos
Commitments And Guarantee Obligations [Line Items]
2022	7,682.3
2023	0.0
2024 and 2025	0.0
2026 and 2027	0.0
2028 and Later	0.0
Maximum Payout	7,682.3
Forward starting repos
Commitments And Guarantee Obligations [Line Items]
2022	4,572.0
2023	0.0
2024 and 2025	0.0
2026 and 2027	0.0
2028 and Later	0.0
Maximum Payout	4,572.0
Other unfunded commitments
Commitments And Guarantee Obligations [Line Items]
2022	25.0
2023	571.3
2024 and 2025	5.4
2026 and 2027	0.0
2028 and Later	0.0
Maximum Payout	601.7
Forward starting securities purchased under agreements to resell
Commitments And Guarantee Obligations [Line Items]
Maximum Payout	$ 7,670.0