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Summary Of Accounting Policies (Components Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011
Summary Of Accounting Policies [Abstract]
Raw materials	$ 2,163,079	$ 2,271,944
Work-in-progress	626,132	579,047
Finished goods	805,128	699,295
Inventories, total	$ 3,594,339	$ 3,550,286

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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