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Credit Quality of Financial Assets and the Allowance for Credit Losses - Summary of Financing Receivables Modified as Troubled Debt Restructurings (Detail) - JPY (¥) ¥ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | ¥ 1,879 | ¥ 2,066
Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | 208 | 395
Consumer borrowers | Consumer-Card loans |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | 3 | 7
Consumer borrowers | Consumer - Other |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | 205 | 388
Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | 1,671 | 1,671
Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies in overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment | ¥ 1,671 | ¥ 1,671

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