CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Fixed maturities available-for-sale, amortized cost	$ 67,502,000,000
Fixed maturities available-for-sale, allowance for credit losses	(13,000,000)	$ 0
Mortgage loans on real estate, allowance for credit losses	66,000,000
Reinsurance recoverable, allowance for credit loss	$ 6,000,000
Preferred stock par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	32,000,000	32,000,000
Preferred stock, shares issued (in shares)	32,000,000	32,000,000
Preferred stock, shares outstanding (in shares)	32,000,000	32,000,000
Preferred stock, liquidation preference	$ 25,000	$ 25,000
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	2,000,000,000	2,000,000,000
Common stock issued (in shares)	552,896,328	552,896,328
Common stock outstanding (in shares)	449,436,843	463,711,392
Treasury stock (in shares)	103,459,485	89,184,936
Fixed maturities
Fixed maturities available-for-sale, amortized cost	$ 67,515,000,000	$ 62,937,000,000
Fixed maturities available-for-sale, allowance for credit losses	$ 13,000,000