Commitments and Contingent Liabilities (Narrative) (Details) (JPY ¥) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2011
Commitments and Contingent Liabilities
Liabilities assumed on recourse receivables	¥ 24,610
Leaseback transactions amount of undiscounted payments	48,261
Commitments outstanding for the purchase of property, plant and equipment	34,760
Contingent liabilities for discounted export bills of exchange	2
Raw materials contract	84,359
Number of manufacturing facilities	4
Number of former manufacturing facilities	1
Environmental remediation accrual for estimated total cost	¥ 7,071

Commitments and Contingent Liabilities Abstract

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Number Of Former Manufacturing Facilities

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Number Of Manufacturing Facilities

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Carrying amount of the liability for remediation of environmental damage pertaining to assets or businesses previously disposed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section Y
-Paragraph Question 4

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The minimum amount the entity agreed to spend under the long-term purchase commitment.

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The liability due as of the balance sheet date for leasebacks accounted for using the deposit method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph d

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 98
-Paragraph 17

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The carrying amount as of the balance sheet date of loss reserves carried at present value.

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-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section N
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Allowance for uncollectible accounts on receivables sold with recourse at the end of the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 04-2
-Paragraph 64
-Subparagraph d

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