Number of affiliated companies accounted for under the equity method.

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- Definition

The number of shares held by the parent in subsidiary or equity method investee.

+ References

No definition available.

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- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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- Definition

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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Description of the accounting treatment for the difference between the amount at which an investment accounted for under the equity method of accounting is reported on the balance sheet and the amount of underlying equity in net assets the reporting entity has in the investee.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Fair value portion of investments accounted under the equity method.

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- Definition

Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries or equity method investee.

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Amount of transactions with related party during the financial reporting period.

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Cash received on stock transaction after deduction of issuance costs.

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No definition available.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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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.

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Investments in Affiliated Companies - Additional Information (Detail) ¥ in Millions		12 Months Ended
	Jan. 30, 2017 JPY (¥) shares	Mar. 31, 2019 JPY (¥) Entity	Mar. 31, 2018 JPY (¥) Entity	Mar. 31, 2017 JPY (¥)	Nov. 14, 2018	Jan. 29, 2017	Apr. 01, 2015
Schedule of Equity Method Investments [Line Items]
Aggregate carrying value of investments in several affiliated companies		¥ 104,079
Fair value of investments in several affiliated companies		¥ 423,108
Number of affiliated companies accounted for under the equity method \| Entity		133	107
Dividends received from affiliated companies		¥ 4,948	¥ 5,613	¥ 7,970
DH Publishing, L.P.
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest					60.00%
M3, Inc.
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest	34.00%					39.35%
Number of shares sold \| shares	17,302,700
Number of shares held \| shares	127,381,600
Cash consideration from sale of shares	¥ 51,968
Gain on sale of shares				¥ 37,167
Difference between carrying value and underlying net assets		¥ 102,696
Difference between carrying value and underlying net assets, accounting treatment for amounts allocated to intangible assets		The amounts allocated to intangible assets are amortized net of the related tax effects to equity in net income (loss) of affiliated companies over their respective estimated useful lives, principally 10 years, using the straight-line method.
SFI Leasing Company, Limited
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest		34.00%
MITSUI-SOKO Supply Chain Solutions, Inc
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest							34.00%
MITSUI-SOKO Supply Chain Solutions, Inc \| General and Administrative Expenses
Schedule of Equity Method Investments [Line Items]
Related party transaction, amounts of transaction		¥ 10,606	9,123
MITSUI-SOKO Supply Chain Solutions, Inc \| Accrued Expenses
Schedule of Equity Method Investments [Line Items]
Related party transaction, account balances		¥ 3,435	¥ 3,662