Income Taxes (Components of Income Before Income Taxes and Income Taxes) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income before income taxes:
Domestic	¥ 96,497	¥ 62,214	¥ 93,353
Foreign	49,086	59,648	52,915
Income before income taxes	145,583	121,862	146,268
Current income taxes:
Domestic	36,363	29,924	32,761
Foreign	12,824	16,380	8,139
Total current income taxes	49,187	46,304	40,900
Deferred income taxes:
Domestic	(23,256)	(42,237)	3,368
Foreign	5,461	(7,508)	6,986
Total deferred income taxes	(17,795)	(49,745)	10,354
Total income taxes	¥ 31,392	¥ (3,441)	¥ 51,254

Income Loss From Continuing Operations Before Income Taxes [Abstract]

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

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

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

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred state and local tax expense (benefit) pertaining to 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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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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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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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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