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Future Policy Benefits - Schedule of Gross Premium Income and Interest Expense (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Liability for Future Policy Benefit, Activity
Gross premium income	$ 805	$ 977
Interest expense	199	157
Traditional Life
Liability for Future Policy Benefit, Activity
Gross premium income	50	57
Interest expense	18	18
Immediate annuities
Liability for Future Policy Benefit, Activity
Gross premium income	12	12
Interest expense	27	30
PRT
Liability for Future Policy Benefit, Activity
Gross premium income	743	908
Interest expense	$ 154	$ 109

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