CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fixed maturities, amortized cost	$ 8,986
Cash and cash equivalents	379	452
Other assets	480	451
Indemnity
Fixed maturities, amortized cost	551	518
Equity securities, cost	24	50
Limited partnerships, cost	107	123
Cash and cash equivalents	45	49
Other assets	114	114
Treasury stock (in shares)	22,110,132	21,838,075
Exchange
Fixed maturities, amortized cost	8,435	7,801
Equity securities, cost	853	778
Trading securities, cost	2,237	2,198
Limited partnerships, cost	757	790
Cash and cash equivalents	334	403
Other assets	$ 366	$ 337
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	46,461,125
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