Commitments, Contingencies and Guarantees - Guarantees (Details) $ in Millions	Feb. 28, 2021 USD ($)
Derivative contracts—non-credit related
Guarantee Obligations [Line Items]
2021	$ 11,232.2
2022	2,940.1
2023  and  2024	8,807.2
2025  and  2026	394.1
2027  and  Later	12.1
Notional/ Maximum Payout	23,385.7
Written derivative contracts—credit related
Guarantee Obligations [Line Items]
2021	0.0
2022	0.0
2023  and  2024	6.4
2025  and  2026	87.2
2027  and  Later	0.0
Notional/ Maximum Payout	93.6
Total derivative contracts
Guarantee Obligations [Line Items]
2021	11,232.2
2022	2,940.1
2023  and  2024	8,813.6
2025  and  2026	481.3
2027  and  Later	12.1
Notional/ Maximum Payout	$ 23,479.3