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Inventories - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory [Line Items]
Inventory reserves	$ 70.7	$ 64.4
Work-in-process inventories
Inventory [Line Items]
Costs and estimated earnings in excess of billings on uncompleted contracts	127.7	107.5
Excess over average costs on long-term contracts	$ 263.0	$ 213.4

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

Amount of valuation reserve for inventory.