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INVENTORIES, NET - Components of Inventories, Net (Detail) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
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Inventory Disclosure [Abstract] |  |
Finished goods | $ 59.0 | $ 53.0
Work in process | 60.5 | 60.5
Raw materials | 192.9 | 166.0
Inventoried costs related to long-term contracts | 39.1 | 33.5
Total inventory before progress payments | 351.5 | 313.0
Less: Progress payments | (23.6) | (17.8)
Inventories, net | $ 327.9 | $ 295.2

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