Securities, Securities Pledged (Details) - Asset Pledged as Collateral [Member] - USD ($) $ in Millions	Mar. 31, 2022	Jun. 30, 2021
Deposits in Excess of FDIC Insurance Limits [Member]
Securities Pledged [Abstract]
Securities, fair value	$ 1,000.0	$ 892.1
Potential Borrowings at Federal Reserve Bank Discount Window [Member]
Securities Pledged [Abstract]
Securities, fair value	$ 18,200.0	$ 3.9

Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

No definition available.

Name:	us-gaap_DebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant