Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Borrowings | $ 65,692.6 | $ 65,374.8 |
| U.S. Treasury and Agency Securities | ||
| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Borrowings | $ 65,692.6 | $ 65,374.8 |