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Accounting Standards (Details) - Accounting Standards Update 2016-02 $ in Billions | 9 Months Ended
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Sep. 30, 2019 USD ($)
Operating Lease Right Of Use Asset |
New accounting pronouncement or change in accounting principle, effect of adoption, quantification | $ 2.8
Operating Lease Liability |
New accounting pronouncement or change in accounting principle, effect of adoption, quantification | $ 2.9

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