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Disposal Group, Including Discontinued Operation, Interest Deposits In Other Banks

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Disposal Group, Including Discontinued Operation, Investment Securities

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Divestiture Of Business, Contingent Consideration, Asset

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Divestiture Of Business, Contingent Consideration Period

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Noncash or Part Noncash Proceeds From Diversiture Of Business, Noncash Financial or Equity Instrument Consideration, Shares

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Ownership Percentage by Noncontrolling Owners

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Profit (Loss) Not Recognized For Fiscal Year

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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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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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until its disposal.

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Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of.

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Amount of noncash consideration received for selling an asset or business through a noncash (or part noncash) transaction.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Business Developments (Narrative) (Detail) - JPY (¥)			12 Months Ended
Business Developments (Narrative) (Detail) - JPY (¥)	Dec. 01, 2022	Nov. 30, 2022	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Business Developments [Line Items]
Gain on sale of MUFG Union Bank			¥ 557,954,000,000	¥ 0	¥ 0
Cash and cash equivalents	¥ 2,433,800,000,000
Net decrease in cash from sale of MUB			(1,711,764,000,000)	0	0
Profit not recognized			223,273,000,000
Comprehensive loss not recognized			(20,291,000,000)
Non-interest bearing note receivable from U.S. Bancorp
Business Developments [Line Items]
Noncash or part noncash divestiture, consideration received			396,601,000,000
Gain (loss) on loans held for sale
Business Developments [Line Items]
Profit not recognized			114,139,000,000
Investment securities gains (losses)
Business Developments [Line Items]
Profit not recognized			143,408,000,000
MUAH \| MUFG Union Bank
Business Developments [Line Items]
Dividends paid		¥ 636,800,000,000
U.S. Bancorp
Business Developments [Line Items]
Ownership percentage by NCI	3.00%
Disposal group, disposed of by sale, not discontinued operations
Business Developments [Line Items]
Assets held for sale			0	11,621,567,000,000
Disposal group, disposed of by sale, not discontinued operations \| MUFG Union Bank
Business Developments [Line Items]
Impairment of assets held for sale				134,141,000,000
Proceeds from divestiture of businesses	¥ 754,000,000,000
Contingent consideration receivable			¥ 464,500,000,000
Contingent consideration period			5 years
Gain on sale of MUFG Union Bank	557,954,000,000
Assets held for sale	13,935,600,000,000			11,621,567,000,000
Interest-earning deposits in other banks	2,251,300,000,000			1,110,633,000,000
Investment securities	3,123,300,000,000			3,188,257,000,000
Loans, net of allowance for credit losses	7,567,700,000,000			6,561,316,000,000
Liabilities held for sale	13,128,000,000,000			11,157,660,000,000
Deposits	¥ 11,789,900,000,000			10,448,481,000,000
Loss from discontinued operation before income tax				¥ 506,329,000,000	¥ 11,385,000,000	¥ 52,021,000,000
Disposal group, disposed of by sale, not discontinued operations \| MUFG Union Bank \| U.S. Bancorp
Business Developments [Line Items]
Noncash proceeds (in shares)	44,374,155