Minimum Tradable Quantity of Share Lot

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6462270&loc=d3e57205-112772

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of dividends that can be declared or paid with approval of regulatory agency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Period Type:	instant

- Definition

Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28,29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Topic 505
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-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Shareholders' equity - Additional Information (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions		1 Months Ended	12 Months Ended
	Apr. 27, 2016	Jun. 07, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Class of Stock [Line Items]
Amounts available for distributions			¥ 1,069,296	¥ 735,394	¥ 583,354
Investee undistributed earnings equity method			¥ 174,260	¥ 164,311	¥ 136,112
Dividends on common stock per share			¥ 13	¥ 19	¥ 17
Minimum tradable quantity of share lot			100
Common stock held in treasury, shares			214,170,602	223,697,388
Common stock held in treasury, value			¥ 148,517	¥ 151,805
Repurchased shares of common stock			24,364,753	155,232,995	40,054,831
Subsequent Event [Member]
Class of Stock [Line Items]
Repurchased shares of common stock		35,000,000
Repurchased shares of common stock at cost		¥ 16,325
Subsequent Event [Member] \| Minimum [Member]
Class of Stock [Line Items]
Share buyback program date	May 18, 2016
Subsequent Event [Member] \| Maximum [Member]
Class of Stock [Line Items]
Repurchased shares of common stock	35,000,000
Repurchased shares of common stock at cost	¥ 20,000
Share buyback program date	Jul. 22, 2016
Affiliated companies
Class of Stock [Line Items]
Common stock held in treasury, shares			1,129,833	1,141,686	1,143,181
Common stock held in treasury, value			¥ 2,024	¥ 2,017	¥ 2,120