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Derivative Instruments (Change In Our Unrealized Gain On Derivative Instruments In Accumulated OCI) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year $ 845    
Federal income tax expense (benefit) 266 $ 276 $ 483
Balance as of end-of-period 1,566 845  
Parent Company [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year 845    
Federal income tax expense (benefit) (95) (66) (77)
Balance as of end-of-period 1,566 845  
Unrealized Gain (Loss) on Derivative Instruments [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year 132 139 256
Unrealized holding gains (losses) arising during the period (215) (241) (250)
Change in foreign currency exchange rate adjustment 96 48 50
Change in DAC, VOBA, DSI and DFEL 3 2 2
Income tax benefit (expense) 41 66 69
Reclassification adjustment for gains (losses) included in net income (loss) 14 (183) (19)
Associated amortization of DAC, VOBA, DSI and DFEL (1) 1 1
Federal income tax expense (benefit) (5) 64 6
Balance as of end-of-period 49 132 139
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Interest rate contracts [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Unrealized holding gains (losses) arising during the period (205) (258) (286)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Interest rate contracts [Member] | Net Investment Income [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) [1] 5 (190) (22)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Interest rate contracts [Member] | Interest and Debt Expense [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) [2] (10) 1 3
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Interest rate contracts [Member] | Realized Gain (Loss) [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) [3] 1    
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Foreign currency contracts [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Unrealized holding gains (losses) arising during the period (10) 17 $ 36
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Foreign currency contracts [Member] | Net Investment Income [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) [1] 11 $ 6  
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash flow hedges | Foreign currency contracts [Member] | Realized Gain (Loss) [Member]      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) [3] $ 7    
[1] The OCI offset is reported within net investment income on our Consolidated Statements of Comprehensive Income (Loss).
[2] The OCI offset is reported within interest and debt expense on our Consolidated Statements of Comprehensive Income (Loss).
[3] The OCI offset is reported within realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).