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v3.19.3.a.u2

Basis of Presentation Basis of Presentation (Out-of-period-correction) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Operating Income (Loss) [Member] |
Quantifying Misstatement in Current Year Financial Statements [Line Items] |
Quantifying Misstatement in Current Year Financial Statements, Amount | $ 12
DAC [Member] |
Quantifying Misstatement in Current Year Financial Statements [Line Items] |
Quantifying Misstatement in Current Year Financial Statements, Amount | 8
Benefits, Claims, Losses and Settlement Expenses [Member] |
Quantifying Misstatement in Current Year Financial Statements [Line Items] |
Quantifying Misstatement in Current Year Financial Statements, Amount | 4
Income Tax Provision [Member] |
Quantifying Misstatement in Current Year Financial Statements [Line Items] |
Quantifying Misstatement in Current Year Financial Statements, Amount | 20
Other Comprehensive Income (Loss) [Member] | Decrease to other comprehensive income related to deferred taxes on currency translation adjustments [Member] |
Quantifying Misstatement in Current Year Financial Statements [Line Items] |
Quantifying Misstatement in Current Year Financial Statements, Amount | $ 87

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