Future Policy Benefits (Rollforward of Unpaid Claims) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period	$ 16,118	$ 16,468
Less: Reinsurance recoverables	2,790	2,592
Net balance, beginning of period	13,328	13,876
Incurred related to:
Current period	14,590	13,420
Prior periods (1)	138	99
Total incurred	14,728	13,519
Paid related to:
Current period	(9,127)	(8,723)
Prior periods	(4,763)	(4,921)
Total paid	(13,890)	(13,644)
Net balance, end of period	14,166	13,751
Add: Reinsurance recoverables	3,022	2,762
Balance, end of period (included in FPBs and other policy-related balances)	$ 17,188	$ 16,513