Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Amortized cost of fixed maturity securities available-for-sale	$ 48,233	$ 46,423
Cost of equity securities available-for-sale	422	400
Mortgage loans valuation allowances	26	25
Mortgage loans, at estimated fair value, relating to variable interest entities	6,120	5,839
Real estate held-for-sale	46	93
Accrued investment income relating to variable interest entities	526	501
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	921	928
Other liabilities relating to variable interest entities	9,828	7,944
Stockholders' 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	272	280
Accrued investment income relating to variable interest entities	1	2
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	132	139
Other liabilities relating to variable interest entities	$ 1	$ 1