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Inventories, Net - Components of Inventories, Net (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Inventory Disclosure [Abstract] |  |
Finished goods | $ 55.9 | $ 53.0
Work in process | 54.8 | 60.5
Raw materials | 184.4 | 166.0
Inventoried costs related to long-term contracts | 38.1 | 33.5
Total inventory before progress payments | 333.2 | 313.0
Less - progress payments | (21.3) | (17.8)
Inventories, net | $ 311.9 | $ 295.2

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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