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Deferred Acquisition Costs, Deferred Sales Inducements, and Value of Business Acquired - Expected Amortization of VOBA (Details)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Expected Amortization of VOBA  
2017 $ 139
2018 128
2019 114
2020 105
2021 $ 96