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Pre-production Costs Related to Long-Term Supply Arrangements - Narrative (Details) - USD ($)
$ in Millions
Apr. 30, 2016
May 02, 2015
Preproduction Costs Related to Long-term Supply Arrangements [Abstract]    
Pre-production tooling costs $ 9.5 $ 10.5
Company owned pre-production tooling capitalized within property, plant and equipment $ 8.0 $ 9.8