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Recently Issued Accounting Standards Excess Tax Benefit (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2017 USD ($)
Income Tax Disclosure [Abstract] |
Excess tax benefits recognized | $ 7.9

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- Definition Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount + References No definition available. + Details
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- References No definition available. + Details
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