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Summary Of Accounting Policies (Schedule Of Components Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Summary Of Accounting Policies [Abstract]
Raw materials	$ 1,950,181	$ 2,260,262
Work-in-progress	537,240	574,728
Finished goods	820,649	682,036
Inventories, total	$ 3,308,070	$ 3,517,026

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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