Investment Securities - Narrative (Details) - USD ($) $ in Millions		6 Months Ended
	Jun. 01, 2022	Jun. 30, 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]
Securities Loaned, Fair Value of Collateral		2,100.0
Transfer to Investments	$ 2,300.0
Debt Securities, Held-to-Maturity, Restricted		2,200.0
Available-for-sale Securities
Schedule of Held-to-maturity Securities [Line Items]
Securities Loaned, Fair Value of Collateral		$ 4,400.0