Derivative instruments and hedging activities.

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- Definition

The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-Subparagraph b(2)

+ Details

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- Definition

Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10

+ Details

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- Definition

Fair value as of the balance sheet date of the assets less the liabilities of a derivative or group of derivatives.

+ Details

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- Definition

Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ Details

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Derivative Instruments and Hedging Activities (Details 2) (JPY ¥) In Millions	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2011 Foreign exchange forward contracts [Member]	Mar. 31, 2010 Foreign exchange forward contracts [Member]	Mar. 31, 2011 Currency option contracts purchased [Member]	Mar. 31, 2010 Currency option contracts purchased [Member]	Mar. 31, 2011 Currency option contracts written [Member]	Mar. 31, 2010 Currency option contracts written [Member]	Mar. 31, 2011 Currency swap agreements [Member]	Mar. 31, 2010 Currency swap agreements [Member]	Mar. 31, 2011 Other currency contracts [Member]	Mar. 31, 2010 Other currency contracts [Member]	Mar. 31, 2011 Interest rate swap agreements [Member]	Mar. 31, 2010 Interest rate swap agreements [Member]	Mar. 31, 2011 Credit default swap agreements [Member]	Mar. 31, 2010 Credit default swap agreements [Member]
Summarizes additional information, including notional amounts, for each type of derivative
Notional amount		¥ 1,364,147	¥ 1,924,697	¥ 5,822	¥ 3,819	¥ 423	¥ 407	¥ 117,028	¥ 50,979	¥ 46,201	¥ 46,499	¥ 448,353	¥ 456,213	¥ 4,841	¥ 10,497
Fair value		(8,825)	(16,049)	19	19	(9)	(11)	2,015	2,022	1,734	850	(13,589)	(11,700)	6	66
Derivative Instruments and Hedging Activities (Textuals) [Abstract]
Cash flow hedges amounted to net reduction of equity	1,589
Equity earnings as profit within the next twelve months	¥ 603