Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) (JPY ¥) In Millions	12 Months Ended
Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Income Taxes
Balance at beginning of year	¥ (9,843)	¥ (7,187)	¥ (9,327)
Increase related to prior year tax positions	(5,690)	(685)	(1,835)
Decrease related to prior year tax positions	532	1,780	3,561
Increase related to current year tax positions	(1,986)	(1,195)	(484)
Change in consolidated subsidiaries		(3,339)
Settlements	1,451	747	60
Translation adjustments	843	36	838
Balance at end of year	¥ (14,693)	¥ (9,843)	¥ (7,187)

Deferred Tax Asset Translation Adjustment

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax reductions attributable to a difference between the tax basis and the generally accepted accounting principles basis of a company's investment in its wholly-owned subsidiaries which will decrease future taxable income when such basis difference reverses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated loss from legal settlements, which can only be deducted for tax purposes when actual litigation losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 11
-Subparagraph b

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- Details

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- Definition

The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a

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- Definition

The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
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-Paragraph 21
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- Definition

The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a(2)

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- Definition

The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a(1)

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