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Revenue from Contracts with Customers - Contract Balances (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 29, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]    
Contract with Customer, Liability, Current $ 73.7 $ 85.7
Contract with Customer, Liability, Noncurrent 5.5 $ 5.2
Contract with Customer, Liability, Revenue Recognized $ 69.7