Derivative Financial Instruments (Credit Related Derivative Contracts) (Details) - USD ($) $ in Millions |
May 31, 2022 |
Nov. 30, 2021 |
|---|---|---|
| Index credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | $ 3,327.3 | $ 3,910.8 |
| Single name credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 0.2 | 17.8 |
| Investment Grade | Index credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 2,428.4 | 2,612.0 |
| Investment Grade | Single name credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 0.0 | 0.0 |
| Non-investment grade | Index credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 898.9 | 1,298.8 |
| Non-investment grade | Single name credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 0.0 | 17.6 |
| Unrated | Index credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | 0.0 | 0.0 |
| Unrated | Single name credit default swaps | ||
| Derivative [Line Items] | ||
| Notional amount | $ 0.2 | $ 0.2 |