Reinsurance (Effects of Reinsurance on Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Premiums, reinsurance and other receivables (net of allowance for credit losses of $10 and $10, respectively)	$ 18,854	$ 15,649
Liabilities:
Future policy benefits	41,105	43,589
Policyholder account balances	74,112	66,195
Other policy-related balances	3,146	3,153
Other liabilities	6,534	3,850
Direct Reinsurance [Member]
Assets
Premiums, reinsurance and other receivables (net of allowance for credit losses of $10 and $10, respectively)	463	434
Liabilities:
Future policy benefits	40,863	43,346
Policyholder account balances	69,633	62,080
Other policy-related balances	1,518	1,500
Other liabilities	5,061	2,618
Assumed index-linked annuities
Assets
Premiums, reinsurance and other receivables (net of allowance for credit losses of $10 and $10, respectively)	29	17
Liabilities:
Future policy benefits	242	243
Policyholder account balances	4,479	4,115
Other policy-related balances	1,628	1,653
Other liabilities	40	58
Ceded Reinsurance [Member]
Assets
Premiums, reinsurance and other receivables (net of allowance for credit losses of $10 and $10, respectively)	18,362	15,198
Liabilities:
Future policy benefits	0	0
Policyholder account balances	0	0
Other policy-related balances	0	0
Other liabilities	$ 1,433	$ 1,174