Percentage of the indemnities under existing regulations to employees covered by defined benefits.

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.

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- Definition

Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

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- Definition

Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Pension and Severance Plans - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Percentage of the indemnities under existing regulations to employees covered by defined benefits	65.00%
Expected amortization of net actuarial loss from accumulated other comprehensive income in next fiscal year		¥ 17,759
Expected amortization of prior service cost from accumulated other comprehensive income in next fiscal year		7,153
Japan
Defined Benefit Plan Disclosure [Line Items]
Expected contribution in defined benefit pension plans		¥ 10,000
Japan \| Private equity
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		30.00%
Japan \| Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		51.00%
Japan \| Other investment funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		19.00%
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution in defined benefit pension plans		¥ 8,000
Foreign plans \| Private equity
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		22.00%
Foreign plans \| Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		53.00%
Foreign plans \| Other investment funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans		25.00%