Condensed Financial Information (Parent Company) (Condensed Balance Sheets - Insets) (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Balance Sheet Statements, Captions [Line Items]
Amortized cost of fixed maturity securities available-for-sale	$ 86,129	$ 83,395
Fixed maturity securities, allowance for credit losses	21	6	$ 11
Mortgage loans valuation allowances	137	119
Premiums, reinsurance and other, allowance for credit losses	$ 3	$ 10
Common stock, par value	$ 25,000	$ 25,000
Common stock, shares authorized	4,000	4,000
Common stock, shares, issued	3,000	3,000
Common stock, shares, outstanding	3,000	3,000
Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Amortized cost of fixed maturity securities available-for-sale	$ 73,144	$ 71,285
Fixed maturity securities, allowance for credit losses	20	4
Mortgage loans valuation allowances	129	114
Premiums, reinsurance and other, allowance for credit losses	$ 3	$ 10
Common stock, par value	$ 25,000	$ 25,000
Common stock, shares authorized	4,000	4,000
Common stock, shares, issued	3,000	3,000
Common stock, shares, outstanding	3,000	3,000