Reinsurance (Effects of Reinsurance on Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets
Premiums, reinsurance and other receivables relating to variable interest entities	$ 29,761	$ 28,971
Market risk benefits, at estimated fair value	372	286
Deferred policy acquisition costs and value of business acquired	19,627	20,151	$ 19,653
Total assets	49,760	49,408
Liabilities
Net liability for FPBs	193,646	196,406
Policyholder account balances	221,445	219,269
Market risk benefits, at estimated fair value	2,581	3,179
Other policy-related balances	18,899	19,736
Other liabilities	36,843	35,805
Total liabilities	251,969	255,126
Direct Reinsurance [Member]
Assets
Premiums, reinsurance and other receivables relating to variable interest entities	6,496	6,044
Market risk benefits, at estimated fair value	365	279
Deferred policy acquisition costs and value of business acquired	19,753	20,297
Total assets	26,614	26,620
Liabilities
Net liability for FPBs	189,328	192,424
Market risk benefits, at estimated fair value	2,566	3,141
Other policy-related balances	18,138	18,852
Other liabilities	26,722	27,125
Total liabilities	236,754	241,542
Assumed Reinsurance [Member]
Assets
Premiums, reinsurance and other receivables relating to variable interest entities	1,432	1,405
Market risk benefits, at estimated fair value	7	7
Deferred policy acquisition costs and value of business acquired	352	353
Total assets	1,791	1,765
Liabilities
Net liability for FPBs	4,318	3,982
Market risk benefits, at estimated fair value	15	38
Other policy-related balances	1,052	1,152
Other liabilities	1,863	1,892
Total liabilities	7,248	7,064
Ceded Reinsurance [Member]
Assets
Premiums, reinsurance and other receivables relating to variable interest entities	21,833	21,522
Market risk benefits, at estimated fair value	0	0
Deferred policy acquisition costs and value of business acquired	(478)	(499)
Total assets	21,355	21,023
Liabilities
Net liability for FPBs	0	0
Market risk benefits, at estimated fair value	0	0
Other policy-related balances	(291)	(268)
Other liabilities	8,258	6,788
Total liabilities	7,967	$ 6,520
Universal Life, Variable Universal Life, and Universal Life with Secondary Guarantees
Liabilities
Other liabilities	$ 770