Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Assets
Amortized cost of fixed maturity securities available-for-sale	$ 49,312	$ 50,154
Cost of equity securities available-for-sale	280	384
Mortgage loans valuation allowances	38	36
Mortgage loans, at estimated fair value, relating to variable interest entities	8,884	7,262
Real estate held-for-sale	0	5
Accrued investment income relating to variable interest entities	591	505
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	804	836
Other liabilities relating to variable interest entities	$ 10,147	$ 7,682
Stockholder’s 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
Variable interest entities
Assets
Mortgage loans, at estimated fair value, relating to variable interest entities	$ 136	$ 172
Accrued investment income relating to variable interest entities	1	1
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	23	48
Other liabilities relating to variable interest entities	$ 1	$ 1