CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fixed maturities, amortized cost	$ 9,687
Cash and cash equivalents	618	$ 514
Other assets	561	501
Indemnity
Fixed maturities, amortized cost	581	555
Equity securities, cost	20	24
Limited partnerships, cost	77	89
Cash and cash equivalents	122	92
Other assets	$ 110	$ 127
Treasury stock (in shares)	22,110,132	22,110,132
Exchange
Fixed maturities, amortized cost	$ 9,106	$ 8,540
Equity securities, cost	681	788
Trading securities, cost	2,483	2,289
Limited partnerships, cost	649	694
Cash and cash equivalents	496	422
Other assets	$ 451	$ 374
Class A | Indemnity
Common stock, stated value per share (in dollars per share)	$ 0.0292	$ 0.0292
Common stock, authorized (in shares)	74,996,930	74,996,930
Common stock, issued (in shares)	68,299,200	68,299,200
Common stock, outstanding (in shares)	46,189,068	46,189,068
Class B | Indemnity
Ratio for converting shares of Class B common stock into shares of Class A common stock (as a percent)	2400.00%	2400.00%
Common stock, stated value per share (in dollars per share)	$ 70	$ 70
Common stock, authorized (in shares)	3,070	3,070
Common stock, issued (in shares)	2,542	2,542
Common stock, outstanding (in shares)	2,542	2,542