XML 63 R52.htm IDEA: XBRL DOCUMENT v3.4.0.3
Investments (Amortized Cost And Fair Value Of Available-For-Sale and Held-To-Maturity Investment Portfolios) (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Available For Sale Securities [Abstract]    
Amortized cost $ 6,224 $ 6,160
Gross unrealized gains 207 132
Gross unrealized losses (141) (172)
Total available-for-sale, fair value 6,290 6,120
Other-than-temporary impairments [1] (92) (89)
Variable Interest Entity Primary Beneficiary [Member]    
Held To Maturity Securities [Abstract]    
Amortized cost 890 2,689
Gross unrealized gains 0 24
Gross unrealized losses (365) (312)
Total Held-To-Maturity, fair value 525 2,401
Other-Than-Temporary Impairments [1] 0 0
Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Held To Maturity Securities [Abstract]    
Amortized cost 890 2,689
Gross unrealized gains 0 24
Gross unrealized losses (365) (312)
Total Held-To-Maturity, fair value 525 2,401
Other-Than-Temporary Impairments [1] 0 0
Money Market Securities [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 206 351
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Total available-for-sale, fair value 206 351
Other-than-temporary impairments [1] 0 0
Perpetual Debt And Equity Securities [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 5 12
Gross unrealized gains 2 1
Gross unrealized losses 0 0
Total available-for-sale, fair value 7 13
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 6,013 5,797
Gross unrealized gains 205 131
Gross unrealized losses (141) (172)
Total available-for-sale, fair value 6,077 5,756
Other-than-temporary impairments [1] (92) (89)
Fixed Maturities [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Held To Maturity Securities [Abstract]    
Amortized cost 890  
Total Held-To-Maturity, fair value 525  
Fixed Maturities [Member] | U S Treasury And Government [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 1,171 947
Gross unrealized gains 55 32
Gross unrealized losses 0 (3)
Total available-for-sale, fair value 1,226 976
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | US States And Political Subdivisions [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 1,559 1,674
Gross unrealized gains 90 65
Gross unrealized losses (3) (14)
Total available-for-sale, fair value 1,646 1,725
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | Foreign Governments [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 187 197
Gross unrealized gains 3 3
Gross unrealized losses (1) (2)
Total available-for-sale, fair value 189 198
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | Corporate Obligations [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 1,638 1,516
Gross unrealized gains 42 21
Gross unrealized losses (96) (103)
Total available-for-sale, fair value 1,584 1,434
Other-than-temporary impairments [1] (88) (85)
Fixed Maturities [Member] | Residential Mortgage-Backed Agency [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 958 995
Gross unrealized gains 13 7
Gross unrealized losses (3) (9)
Total available-for-sale, fair value 968 993
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | Residential Mortgage-Backed Non-Agency [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 55 55
Gross unrealized gains 1 2
Gross unrealized losses (7) (6)
Total available-for-sale, fair value 49 51
Other-than-temporary impairments [1] (4) (4)
Fixed Maturities [Member] | Commercial Mortgage-Backed [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 30 31
Gross unrealized gains 0 0
Gross unrealized losses (1) 0
Total available-for-sale, fair value 29 31
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | Collateralized Debt Obligations [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 46 51
Gross unrealized gains 0 0
Gross unrealized losses (17) (18)
Total available-for-sale, fair value 29 33
Other-than-temporary impairments [1] 0 0
Fixed Maturities [Member] | Other Asset-Backed [Member]    
Available For Sale Securities [Abstract]    
Amortized cost 369 331
Gross unrealized gains 1 1
Gross unrealized losses (13) (17)
Total available-for-sale, fair value 357 315
Other-than-temporary impairments [1] $ 0 $ 0
[1] Represents unrealized gains or losses on other than temporarily impaired securities recognized in AOCI, which includes the non-credit component of impairments, as well as all subsequent changes in fair value of such impaired securities reported in AOCI.