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Acquisition and Strategic Transaction Details - Transaction Expenses - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Business Combinations [Abstract] |  |  |  |
Strategic transaction expenses | $ 18.0 | $ 12.4 | $ 37.8 | $ 33.5

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- Definition Strategic transaction expenses + References No definition available. + Details
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- References No definition available. + Details
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