Income Taxes, Textuals (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Bad debt from acquired savings banks	$ 100
Deferred tax on bad debt from acquired savings banks	25
Income Tax Examination, Penalties and Interest Expense	0	$ 0
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	126
Operating tax loss carryforwards from acquisitions	$ 2
Operating Loss Carryforwards, Expiration Begin Date	begin expiring in 2024