XML 53 R45.htm IDEA: XBRL DOCUMENT v2.4.0.8
Loss And Loss Adjustment Expense Reserves (Schedule Of Loss And Loss Adjustment Expenses Reserves) (Detail) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Loss And Loss Adjustment Expense Reserves [Line Items]    
Changes in unearned premium revenue $ 303 $ 392
Changes in LAE reserves 124 169
Loss And Lae Reserves [Member]
    
Loss And Loss Adjustment Expense Reserves [Line Items]    
Gross loss andLAE reserve, beginning balance 641  
Loss payments for cases with reserves (131)  
Accretion of claim liability discount 11  
Changes in discount rates 42  
Changes in assumptions (48)  
Changes in unearned premium revenue 17  
Changes in LAE reserves 7  
Other (22) [1]  
Gross loss andLAE reserve, ending balance $ 517  
[1]
Primarily changes in amount and timing of payments.