Consolidated Balance Sheet Parentheticals (Unaudited at March 31, 2023) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Fixed maturities, available for sale, amortized cost	$ 77,827	$ 77,380
Fixed maturities, available for sale, allowance for expected credit losses	4	3
Equity securities, cost	592	747
Premiums receivable, allowance for expected credit losses	77	77
Reinsurance recoverables, allowance for estimated uncollectible reinsurance	131	132
Contractholder receivables, allowance for expected credit losses	$ 19	$ 17
Common stock, shares authorized (in shares)	1,750.0	1,750.0
Common stock, shares issued (in shares)	231.0	232.1
Common stock, shares outstanding (in shares)	231.0	232.1
Treasury stock, at cost (in shares)	556.0	553.5