CONSOLIDATED BALANCE SHEET (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Fixed maturities available-for-sale, amortized cost	$ 44,926	$ 42,492
Mortgage loans on real estate, valuation allowances	$ 0	$ 7
Common stock par value (in dollars per share)	$ 1.25	$ 1.25
Common stock authorized (in shares)	2,000,000	2,000,000
Common stock issued (in shares)	2,000,000	2,000,000
Common stock outstanding (in shares)	2,000,000	2,000,000