Indemnity Capital Stock (Details 2) (Indemnity, Class A, Stock repurchase program, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Oct. 31, 2011
Indemnity \| Class A \| Stock repurchase program
Stock repurchases
Amount of authorized stock repurchases approved for continuation under the current program		$ 150
Approximate amount of repurchase authority remaining under the current stock repurchase program	$ 18

Amount remaining of a stock repurchase plan authorized.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant