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Derivative Financial Instruments and Hedging - Additional Information (Detail) (JPY ¥) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on cash flow hedges reclassified from accumulated other comprehensive income (loss) into earnings	¥ 193,991	¥ 119,058	¥ 85,901
Net derivative losses included in accumulated other comprehensive income (loss), that will be reclassified into earnings within fiscal 2015	(482)
Net gains (losses) on cash flow hedges reclassified from accumulated other comprehensive income (loss) into earnings	269	(69)	0
Net gains (losses) hedge ineffectiveness associated with instruments designated as fair value hedges recorded in earnings	(20)	(47)	(265)
Net unrealized gains (losses) on derivative instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on cash flow hedges reclassified from accumulated other comprehensive income (loss) into earnings	¥ (915)	¥ (824)	¥ 181

X

- Definition

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

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The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.

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Amount of gain (loss)recognized in the income statement from the hedging ineffectiveness of a fair value hedge.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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