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Description of the Business and Summary of Significant Accounting Policies - ASU 2016-02 (Details) - Accounting Standards Update 2016-02 [Member] - Scenario, Forecast [Member] $ in Millions | Jan. 01, 2019 USD ($)
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Minimum [Member] |
Assets and Liabilities, Lessee [Abstract] |
Right-of-use asset | $ 95
Lease liability | 95
Maximum [Member] |
Assets and Liabilities, Lessee [Abstract] |
Right-of-use asset | 105
Lease liability | 105
Expected net impact to assets and liabilities | $ 5

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