XML 63 R65.htm IDEA: XBRL DOCUMENT v3.2.0.727
Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 30, 2015
Jun. 30, 2014
 [2]
Jun. 30, 2015
Jun. 30, 2014
 [4]
Sep. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Document Period End Date     Jun. 30, 2015    
Percentage of male contractholder     50.00%    
Percentage of female contractholder     50.00%    
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount $ 0   $ 0    
Net transfer In (Out) of Level 3 (a) 18,100,000 [1] $ (18,900,000) (15,400,000) [3] $ (23,900,000)  
Asset Backed Securities and Corporate Securities [Member]          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Net transfer In (Out) of Level 3 (a) [4]     (34,500,000)    
Asset-backed Securities [Member]          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Net transfer In (Out) of Level 3 (a) (1,000,000) [3] $ (4,800,000) (10,400,000) [3] $ (3,800,000)  
Fixed Maturities Available For Sale [Member]          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Available-for-sale Securities, Debt Securities 17,723,600,000   17,723,600,000   $ 17,211,500,000
Fixed Maturities Available For Sale [Member] | Asset-backed Securities [Member]          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Available-for-sale Securities, Debt Securities $ 1,887,500,000   $ 1,887,500,000   $ 1,792,900,000
[1] (a) During the three months ended June 30, 2015, the net transfers out of Level 3 were exclusively to Level 2 and the net transfer to Level 3 was related to a loan receivable previously eliminated upon consolidation.
[2] (a) The net transfers out of Level 3 for the three months ended June 30, 2014 were exclusively to Level 2.
[3] (a) During the nine months ended June 30, 2015, the net transfers out of Level 3 were exclusively to Level 2 and the net transfer to Level 3 was related to a loan receivable previously eliminated upon consolidation.
[4] (a) The net transfers out of Level 3 for the nine months ended June 30, 2014 were exclusively to Level 2. There was a $6.0 transfer to asset-backed securities from commercial mortgage-backed securities, the remaining transfers were from Level 3 to Level 2.