Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
---|---|---|
Operating Loss Carryforwards [Line Items] | ||
Tax credit carryforward, amount | $ 45 | $ 51 |
Allocations for bad debt deductions of former thrift subsidiaries included in retained earnings | $ 100 | $ 100 |