Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Assets
Amortized cost of fixed maturity securities available-for-sale	$ 59,886	$ 59,672
Mortgage loans valuation allowances	$ 60	$ 56
Equity
Common stock, par value	$ 25,000	$ 25,000
Common stock, shares authorized	4,000	4,000
Common stock, shares issued	3,000	3,000
Common stock, shares outstanding	3,000	3,000