Investment Securities - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Jun. 01, 2022 |
Mar. 31, 2023 |
|
| Schedule of Held-to-maturity Securities [Line Items] | ||
| OCI, Debt Securities, Available-for-Sale, Transfer from Held-to-Maturity, Gain (Loss), before Adjustment and Tax | $ 218.3 | |
| Held-to-maturity Securities | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value | 2,100.0 | |
| Transfer to Investments | $ 2,300.0 | |
| Available-for-sale Securities | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value | $ 4,600.0 |