Subsequent event - Additional Information (Detail) - Cerberus Capital Management LP [Member] - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Jan. 31, 2023 |
Jan. 31, 2023 |
Apr. 30, 2023 |
Feb. 17, 2023 |
|
| Disclosure of non-adjusting events after reporting period [line items] | ||||
| Pre tax loss contingency | $ 1,169 | |||
| Loss contingency provision | $ 855 | $ 855 | ||
| Events Occurring After Reporting Period [Member] | ||||
| Disclosure of non-adjusting events after reporting period [line items] | ||||
| Amount payable for settlement of lawsuit | $ 85 | $ 770 |