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Pre-production Costs Related to Long-Term Supply Arrangements - Narrative (Details) - USD ($) $ in Millions | Apr. 28, 2018 | Apr. 29, 2017
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Preproduction Costs Related to Long-term Supply Arrangements [Abstract] |  |
Pre-production tooling costs | $ 20.5 | $ 15.5
Company owned pre-production tooling capitalized within property, plant and equipment | $ 10.1 | $ 7.1

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- Definition Carrying amount as of the balance sheet date of capitalized costs of molds, dies, and other tools that the entity does not own which are or will be used in producing goods under a long-term supply arrangement, and for which there is a noncancelable right of use during such arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27011391&loc=d3e105117-122735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6387057&loc=d3e6233-108318 + Details
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- Definition The carrying amount as of the balance sheet date of capitalized preproduction costs incurred on long-term supply arrangements, including recoverable costs to design and develop products. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387057&loc=d3e6169-108318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6387057&loc=d3e6233-108318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section S99 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27011391&loc=d3e105117-122735 + Details
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