XML 68 R57.htm IDEA: XBRL DOCUMENT v3.7.0.1
Investments (Gross Unrealized Losses Related To Available-For-Sale And Held-To-Maturity Investments) (Detail) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Available For Sale Securities [Abstract]    
Less than 12 months, fair value $ 1,720  
Less than 12 months, unrealized losses (77)  
12 months or longer, fair value 199  
12 months or longer, unrealized losses (74)  
Total available-for-sale, fair value 1,919  
Total available-for-sale, unrealized losses (151)  
Variable Interest Entity Primary Beneficiary [Member]    
Held To Maturity Securities [Abstract]    
Less than 12 months, fair value 0 $ 0
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 0 876
12 months or longer, unrealized losses 0 (14)
Total held-to-maturity, fair value 0 876
Total held-to-maturity, unrealized losses 0 (14)
Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Held To Maturity Securities [Abstract]    
Less than 12 months, fair value 0 0
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 0 876
12 months or longer, unrealized losses 0 (14)
Total held-to-maturity, fair value 0 876
Total held-to-maturity, unrealized losses 0 (14)
Perpetual Debt And Equity Securities [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 0  
Less than 12 months, unrealized losses 0  
12 months or longer, fair value 0  
12 months or longer, unrealized losses 0  
Total available-for-sale, fair value 0  
Total available-for-sale, unrealized losses 0  
Fixed Maturities [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 1,720 1,872
Less than 12 months, unrealized losses (77) (62)
12 months or longer, fair value 199 300
12 months or longer, unrealized losses (74) (86)
Total available-for-sale, fair value 1,919 2,172
Total available-for-sale, unrealized losses (151) (148)
Fixed Maturities [Member] | U S Treasury And Government [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 396 432
Less than 12 months, unrealized losses (5) (10)
12 months or longer, fair value 0 0
12 months or longer, unrealized losses 0 0
Total available-for-sale, fair value 396 432
Total available-for-sale, unrealized losses (5) (10)
Fixed Maturities [Member] | US States And Political Subdivisions [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 334 339
Less than 12 months, unrealized losses (51) (13)
12 months or longer, fair value 8 18
12 months or longer, unrealized losses 0 (2)
Total available-for-sale, fair value 342 357
Total available-for-sale, unrealized losses (51) (15)
Fixed Maturities [Member] | Foreign Government Debt [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 2 5
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 0 0
12 months or longer, unrealized losses 0 0
Total available-for-sale, fair value 2 5
Total available-for-sale, unrealized losses 0 0
Fixed Maturities [Member] | Corporate Obligations [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 392 534
Less than 12 months, unrealized losses (13) (29)
12 months or longer, fair value 53 52
12 months or longer, unrealized losses (65) (73)
Total available-for-sale, fair value 445 586
Total available-for-sale, unrealized losses (78) (102)
Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 435 436
Less than 12 months, unrealized losses (7) (9)
12 months or longer, fair value 100 122
12 months or longer, unrealized losses (3) (3)
Total available-for-sale, fair value 535 558
Total available-for-sale, unrealized losses (10) (12)
Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 1 1
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 27 29
12 months or longer, unrealized losses (6) (6)
Total available-for-sale, fair value 28 30
Total available-for-sale, unrealized losses (6) (6)
Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 2 6
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 9 15
12 months or longer, unrealized losses 0 0
Total available-for-sale, fair value 11 21
Total available-for-sale, unrealized losses 0 0
Fixed Maturities [Member] | Collateralized Debt Obligations [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 5 7
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 0 15
12 months or longer, unrealized losses 0 0
Total available-for-sale, fair value 5 22
Total available-for-sale, unrealized losses 0 0
Fixed Maturities [Member] | Other Asset Backed [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 153 112
Less than 12 months, unrealized losses (1) (1)
12 months or longer, fair value 2 49
12 months or longer, unrealized losses 0 (2)
Total available-for-sale, fair value 155 161
Total available-for-sale, unrealized losses $ (1) $ (3)