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Acquisitions - Narrative (Details) - 1 months ended May 31, 2018 - Altek
£ in Millions, $ in Millions
GBP (£)
USD ($)
USD ($)
Business Acquisition [Line Items]      
Purchase price £ 45 $ 60.0  
Additional contingent consideration £ 25   $ 33.0
Payments to Acquire Businesses, Net of Cash Acquired   $ 59.4  
Estimated preliminary fair value     $ 12.1