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Securities, Federal Home Loan Bank Stock (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Federal Home Loan Bank Stock [Abstract]        
Impairment charges $ 0 $ 0 $ 0 $ 0
Federal Home Loan Bank Stock [Member]        
Federal Home Loan Bank Stock [Abstract]        
Impairment charges $ 0 $ 0 $ 0 $ 0