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INVENTORIES, NET - Components of Inventories, Net (Detail) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
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Inventory Disclosure [Abstract] |  |
Finished goods | $ 62.7 | $ 55.9
Work in process | 88.9 | 54.8
Raw materials | 212.4 | 184.4
Inventoried costs related to long-term contracts | 40.9 | 38.1
Total inventory before progress payments | 404.9 | 333.2
Less: Progress payments (see Note 2) | 0.0 | (21.3)
Inventories, net | $ 404.9 | $ 311.9

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