Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value $ 5,651,401 $ 6,135,765
Trading account assets, at fair value 18,892 11,376
Equity securities, available for sale 771 4,327
Short-term investments 16,002 112,337
Cash equivalents 205,787 317,699
Other long-term investments 1,596 119,683
Reinsurance recoverable 11,400 1,287,157
Subtotal excluding separate account assets 6,080,731 8,174,467
Separate account assets 100,402,349 [1] 80,887,276 [1]
Total assets 106,483,080 89,061,743
Future policy benefits (348,399) 1,417,891 [2]
Other liabilities 533,684 0
Total liabilities 185,285 1,417,891
Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Receivables from parents and affiliates 174,882 186,123
US Treasury And Government [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 93,525 187,619
Obligations of U.S. states and their political subdivisions [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 78,951 85,197
Foreign Government Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 23,997 27,511
Corporate Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 4,541,369 4,598,634
Trading account assets, at fair value 14,183  
Asset-backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 222,091 373,474
Trading account assets, at fair value 1,978 4,008
Commercial Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 522,008 489,421
Trading account assets, at fair value 0 4,091
Residential Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 169,460 373,909
Equity Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading account assets, at fair value 2,731 3,277
Fair Value, Inputs, Level 1 [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Equity securities, available for sale 112 2,683
Short-term investments 9,216 81,308
Cash equivalents 5,962 10,305
Other long-term investments 0 0
Reinsurance recoverable 0 0
Subtotal excluding separate account assets 15,290 94,296
Separate account assets 973,192 [1] 345,437 [1]
Total assets 988,482 439,733
Future policy benefits 0 0
Other liabilities 0 0
Total liabilities 0 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Receivables from parents and affiliates 0 0
Fair Value, Inputs, Level 1 [Member] | US Treasury And Government [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Obligations of U.S. states and their political subdivisions [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Foreign Government Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0  
Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Residential Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 2 [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 5,552,174 5,990,057
Trading account assets, at fair value 16,161 8,099
Equity securities, available for sale 90 155
Short-term investments 6,768 31,029
Cash equivalents 199,825 307,394
Other long-term investments 73,647 187,384
Reinsurance recoverable 0 0
Subtotal excluding separate account assets 6,019,426 6,708,246
Separate account assets 99,149,315 [1] 80,293,584 [1]
Total assets 105,168,741 87,001,830
Future policy benefits 0 0
Other liabilities 218,467 68,689
Total liabilities 218,467 68,689
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Receivables from parents and affiliates 170,761 184,128
Fair Value, Inputs, Level 2 [Member] | US Treasury And Government [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 93,525 187,619
Fair Value, Inputs, Level 2 [Member] | Obligations of U.S. states and their political subdivisions [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 78,951 85,197
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 23,997 27,511
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 4,523,076 4,561,653
Trading account assets, at fair value 14,183  
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 141,157 264,747
Trading account assets, at fair value 1,978 4,008
Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 522,008 489,421
Trading account assets, at fair value 0 4,091
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 169,460 373,909
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 3 [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 99,227 145,708
Trading account assets, at fair value 2,731 3,277
Equity securities, available for sale 569 1,489
Short-term investments 18 0
Cash equivalents 0 0
Other long-term investments 1,168 988
Reinsurance recoverable 11,400 1,287,157
Receivables from parents and affiliates   1,995
Subtotal excluding separate account assets 119,234 1,440,614
Separate account assets 279,842 [1] 248,255 [1]
Total assets 399,076 1,688,869
Future policy benefits (348,399) [2] 1,417,891 [2]
Other liabilities 388,268 [3] 0
Total liabilities 39,869 1,417,891
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value   31,356
Other long-term investments 1,168 988
Reinsurance recoverable 11,400 1,287,157
Receivables from parents and affiliates 4,121 1,995
Subtotal excluding separate account assets 119,234 1,440,614
Total assets 399,076 1,688,869
Future policy benefits (348,399) 1,417,891
Total liabilities 39,869 1,417,891
Fair Value, Inputs, Level 3 [Member] | US Treasury And Government [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Obligations of U.S. states and their political subdivisions [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Foreign Government Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 18,293 36,981
Trading account assets, at fair value 0  
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 15,100  
Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 80,934 108,727
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading account assets, at fair value 2,731 3,277
Netting And Collateral [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Equity securities, available for sale 0 0
Short-term investments 0 0
Cash equivalents 0 0
Other long-term investments (73,219) [4] (68,689) [4]
Reinsurance recoverable 0 0
Subtotal excluding separate account assets (73,219) [4] (68,689) [4]
Separate account assets 0 [1] 0 [1]
Total assets (73,219) [4] (68,689) [4]
Future policy benefits 0 0
Other liabilities (73,051) [4] (68,689) [4]
Total liabilities (73,051) [4] (68,689) [4]
Netting And Collateral [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Receivables from parents and affiliates 0 0
Netting And Collateral [Member] | US Treasury And Government [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Netting And Collateral [Member] | Obligations of U.S. states and their political subdivisions [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Netting And Collateral [Member] | Foreign Government Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Netting And Collateral [Member] | Corporate Debt Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0  
Netting And Collateral [Member] | Asset-backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Netting And Collateral [Member] | Commercial Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Trading account assets, at fair value 0 0
Netting And Collateral [Member] | Residential Mortgage Backed Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities, available for sale, at fair value 0 0
Netting And Collateral [Member] | Equity Securities [Member]
    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading account assets, at fair value $ 0 $ 0
[1] (2) Separate account assets represent segregated funds that are invested for certain customers. Investment risks associated with market value changes are borne by the customers, except to the extent of minimum guarantees made by the Company with respect to certain accounts. Separate account assets classified as Level 3 consist primarily of real estate and real estate investment funds. Separate account liabilities are not included in the above table as they are reported at contract value and not fair value in the Company’s Consolidated Statements of Financial Position.
[2] (4) For the year ended December 31, 2013, the net embedded derivative asset position of $348 million includes $1,228 million of embedded derivatives in an asset position and $880 million of embedded derivatives in a liability position. For the year ended December 31, 2012, the net embedded derivative liability position of $1,418 million includes $431 million of embedded derivatives in an asset position and $1,849 million of embedded derivatives in a liability position.
[3] (3) Reinsurance of variable annuity living benefit features classified as “Reinsurance Recoverables” at December 31, 2012 were reclassified to “Other Liabilities” – at December 31, 2013 as they were in a net liability position.
[4] (1) "Netting" amounts represents swap variation margin of $0.2 million and $0 million as of December 31, 2013 and December 30, 2012, respectively, and the impact of offsetting asset and liability positions held with the same counterparty, subject to master netting arrangements.