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Goodwill and Other Intangible Assets - Narrative (Details)
$ in Millions
Jun. 30, 2018
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year $ 13.8
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 27.5
Finite-Lived Intangible Assets, Amortization Expense, Year Two 26.3
Finite-Lived Intangible Assets, Amortization Expense, Year Three 23.9
Finite-Lived Intangible Assets, Amortization Expense, Year Four 20.8
Finite-Lived Intangible Assets, Amortization Expense, Year Five 15.8
Finite-Lived Intangible Assets, Amortization Expense, after Year Five $ 131.6