Consolidated Balance Sheet Parentheticals (Unaudited at June 30, 2022) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed maturities, available for sale, amortized cost	$ 75,917	$ 74,751
Fixed maturities, available for sale, allowance for expected credit losses	4	3
Equity securities, cost	755	749
Premiums receivable, allowance for expected credit losses	89	107
Reinsurance recoverables, allowance for estimated uncollectible reinsurance	132	141
Contractholder receivables, allowance for expected credit losses	$ 18	$ 21
Common stock, shares authorized (in shares)	1,750.0	1,750.0
Common stock, shares issued (in shares)	237.3	241.2
Common stock, shares outstanding (in shares)	237.3	241.2
Treasury stock, at cost (in shares)	547.7	541.5