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Income before Income Taxes and Discontinued Operations, and Provision for Income Taxes (Detail) (JPY ¥) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Income Taxes [Line Items]
Income before income taxes and discontinued operations	¥ 181,891		¥ 109,363		¥ 71,317
Income before income taxes and discontinued operations	101,835		63,209		56,198
Income before income taxes and discontinued operations	283,726	[1]	172,572	[1]	127,515	[1]
Current provision for income taxes	45,389		21,103		28,381
Deferred provision for income taxes	51,847		32,579		16,227
Provision for income taxes	97,236		53,682		44,608
Japan
Income Taxes [Line Items]
Current provision for income taxes	18,296		7,428		11,956
Deferred provision for income taxes	48,922		27,371		18,079
Overseas
Income Taxes [Line Items]
Current provision for income taxes	27,093		13,675		16,425
Deferred provision for income taxes	¥ 2,925		¥ 5,208		¥ (1,852)
[1] Results of discontinued operations before applicable tax effect are included in each amount attributed to each geographic area.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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