Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Footnote) (Detail) - USD ($) $ in Millions |
May 31, 2016 |
Nov. 30, 2015 |
|---|---|---|
| Banking and Thrift [Abstract] | ||
| Securities borrowing arrangements | $ 6,076.9 | $ 5,796.1 |
| Securities borrowing arrangements, collateral | 5,916.1 | 5,613.3 |
| Securities borrowing arrangements, repurchase agreements | 1,103.0 | 1,807.2 |
| Securities borrowing arrangements, pledged securities collateral | $ 1,143.7 | $ 1,875.3 |