Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase - Repurchase Agreements Accounted for as Secured Borrowings (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
---|---|---|
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Gross Amount of Recognized Liabilities for Repurchase Agreements in Note 27 | $ 150.7 | $ 381.7 |
Maturity overnight and continuous | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Total borrowings, repurchase agreements | 168.3 | |
Gross Amount of Recognized Liabilities for Repurchase Agreements in Note 27 | 168.3 | |
Amounts related to agreements not included in Note 27 | 0.0 | |
Maturity overnight and continuous | U.S. Treasury and Agency Securities | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Total borrowings, repurchase agreements | $ 168.3 |