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Basis Of Presentation New Accounting Pronouncements (Details) $ in Millions | Jan. 01, 2018 USD ($)
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Cumulative effect of adoption of new accounting pronouncements | $ (22)
Accounting Standards Update 2018-02 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Cumulative effect of adoption of new accounting pronouncements | $ 9

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