Federal Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 2,300,000,000
Valuation allowance	0
Unrecognized tax benefits that would impact effective tax rate	33,000,000	$ 75,000,000
Decrease in unrecognized tax benefits is reasonably possible	2,000,000
Unrecognized tax benefits, income tax penalties and interest expense	0	0	$ 0
Unrecognized tax benefits, income tax penalties and interest accrued	0	$ 0
Capital Loss Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	267,000,000
Internal Revenue Service (IRS)
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	$ 169,000,000