Consolidated Balance Sheet Parentheticals - USD ($) shares in Millions, $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Fixed maturities, available for sale, amortized cost	$ 77,380	$ 74,751
Fixed maturities, available for sale, allowance for expected credit losses	3	3
Equity securities, cost	747	749
Premiums receivable, allowance for expected credit losses	77	107	$ 105
Reinsurance recoverables, allowance for estimated uncollectible reinsurance	132	141	146
Contractholder receivables, allowance for expected credit losses	$ 17	$ 21	$ 19
Common stock, shares authorized (in shares)	1,750.0	1,750.0
Common stock, shares issued (in shares)	232.1	241.2
Common stock, shares outstanding (in shares)	232.1	241.2
Treasury stock, at cost (in shares)	553.5	541.5