Commitments, Contingencies and Guarantees - Guarantees (Details) $ in Millions	May 31, 2021 USD ($)
Derivative contracts—non-credit related
Guarantee Obligations [Line Items]
2021	$ 10,052.6
2022	5,851.3
2023  and  2024	9,272.7
2025  and  2026	398.3
2027  and  Later	12.2
Notional/ Maximum Payout	25,587.1
Written derivative contracts—credit related
Guarantee Obligations [Line Items]
2021	0.0
2022	0.0
2023  and  2024	6.4
2025  and  2026	81.8
2027  and  Later	0.0
Notional/ Maximum Payout	88.2
Total derivative contracts
Guarantee Obligations [Line Items]
2021	10,052.6
2022	5,851.3
2023  and  2024	9,279.1
2025  and  2026	480.1
2027  and  Later	12.2
Notional/ Maximum Payout	$ 25,675.3