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Inventories (Schedule of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Inventories
Raw Materials	$ 68,427us-gaap_InventoryRawMaterialsNetOfReserves	$ 60,442us-gaap_InventoryRawMaterialsNetOfReserves
Work in progress	96,833us-gaap_InventoryWorkInProcessNetOfReserves	93,836us-gaap_InventoryWorkInProcessNetOfReserves
Component Parts	252,980wwd_InventoryComponentPartsNetOfReserves	247,299wwd_InventoryComponentPartsNetOfReserves
Finished Goods	49,460us-gaap_InventoryFinishedGoodsNetOfReserves	50,367us-gaap_InventoryFinishedGoodsNetOfReserves
Inventory, net	$ 467,700us-gaap_InventoryNet	$ 451,944us-gaap_InventoryNet

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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of component parts, which includes items that can be sold separately as finished goods or included in the manufacture of other products.

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