Reinsurance (Effects of Reinsurance on Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Premiums and Other Receivables, Net	$ 20,809	$ 19,389
Market risk benefit assets	1,092	656
Liabilities
Future policy benefits	31,085	32,149
Policyholder account balances	87,162	80,193
Market risk benefit liabilities	8,346	10,344
Other policy-related balances	3,677	3,619
Other liabilities	8,460	7,772
Direct Reinsurance
Assets
Premiums and Other Receivables, Net	340	289
Market risk benefit assets	1,075	613
Liabilities
Future policy benefits	30,925	31,989
Policyholder account balances	83,019	75,893
Market risk benefit liabilities	8,095	9,972
Other policy-related balances	2,109	2,023
Other liabilities	6,774	6,526
Assumed Reinsurance
Assets
Premiums and Other Receivables, Net	32	33
Market risk benefit assets	0	0
Liabilities
Future policy benefits	160	160
Policyholder account balances	4,143	4,300
Market risk benefit liabilities	251	372
Other policy-related balances	1,568	1,596
Other liabilities	9	11
Ceded Reinsurance
Assets
Premiums and Other Receivables, Net	20,437	19,067
Market risk benefit assets	17	43
Liabilities
Future policy benefits	0	0
Policyholder account balances	0	0
Market risk benefit liabilities	0	0
Other policy-related balances	0	0
Other liabilities	$ 1,677	$ 1,235