Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Assets
Amortized cost of fixed maturity securities available-for-sale	$ 59,672	$ 58,599
Mortgage loans valuation allowances	$ 56	$ 46
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