Credit Quality of Financial Assets and the Allowance for Credit Losses - Summary of Modifications of Financing Receivables (Detail) - JPY (¥)
¥ in Millions |
12 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
| Interest rate reduction |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 7
|
¥ 2
|
¥ 1,266
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Consumer borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 7
|
¥ 2
|
¥ 1,266
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.10%
|
| Interest rate reduction | Consumer borrowers | Real estate loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 5
|
| % of total class of financing receivable |
|
|
0.00%
|
| Interest rate reduction | Consumer borrowers | Card loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 1,176
|
| % of total class of financing receivable |
|
|
1.60%
|
| Interest rate reduction | Consumer borrowers | Other |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 7
|
¥ 2
|
¥ 85
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.20%
|
| Interest rate reduction | Corporate borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Non-recourse Loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Non-recourse Loans | The Americas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Other than non-recourse loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Real estate companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Interest rate reduction | Loans to Equity Method Investees |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Interest rate reduction | Net investment in leases |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Interest rate reduction | Net investment in leases | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Interest rate reduction | Net investment in leases | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Term extension |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 8,965
|
¥ 12,301
|
¥ 10,106
|
| % of total class of financing receivable |
0.20%
|
0.20%
|
0.20%
|
| Term extension | Consumer borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 15
|
¥ 50
|
¥ 4,652
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.20%
|
| Term extension | Consumer borrowers | Real estate loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 1
|
| % of total class of financing receivable |
|
|
0.00%
|
| Term extension | Consumer borrowers | Card loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 6
|
| % of total class of financing receivable |
|
|
0.00%
|
| Term extension | Consumer borrowers | Other |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 15
|
¥ 50
|
¥ 4,645
|
| % of total class of financing receivable |
0.00%
|
0.10%
|
9.20%
|
| Term extension | Corporate borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 8,859
|
¥ 11,318
|
¥ 4,499
|
| % of total class of financing receivable |
0.50%
|
0.70%
|
0.30%
|
| Term extension | Corporate borrowers | Non-recourse Loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 2,141
|
¥ 1,277
|
| % of total class of financing receivable |
|
0.60%
|
0.70%
|
| Term extension | Corporate borrowers | Non-recourse Loans | The Americas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 2,141
|
¥ 1,277
|
| % of total class of financing receivable |
|
2.50%
|
2.50%
|
| Term extension | Corporate borrowers | Other than non-recourse loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 8,859
|
¥ 9,177
|
¥ 3,222
|
| % of total class of financing receivable |
0.70%
|
0.70%
|
0.30%
|
| Term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 313
|
¥ 1,272
|
¥ 69
|
| % of total class of financing receivable |
0.10%
|
0.30%
|
0.00%
|
| Term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 404
|
¥ 623
|
¥ 711
|
| % of total class of financing receivable |
0.20%
|
0.20%
|
0.40%
|
| Term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 8,142
|
¥ 7,282
|
¥ 2,442
|
| % of total class of financing receivable |
1.50%
|
1.30%
|
0.30%
|
| Term extension | Loans to Equity Method Investees |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 933
|
¥ 955
|
| % of total class of financing receivable |
|
0.70%
|
0.40%
|
| Term extension | Net investment in leases |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 91
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Term extension | Net investment in leases | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 91
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Term extension | Net investment in leases | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Principal forgiveness |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 29
|
¥ 16
|
¥ 974
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Principal forgiveness | Consumer borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 5
|
¥ 0
|
¥ 42
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Principal forgiveness | Consumer borrowers | Real estate loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 1
|
| % of total class of financing receivable |
|
|
0.00%
|
| Principal forgiveness | Consumer borrowers | Card loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
|
¥ 40
|
| % of total class of financing receivable |
|
|
0.10%
|
| Principal forgiveness | Consumer borrowers | Other |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 1
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Principal forgiveness | Corporate borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 12
|
¥ 16
|
¥ 932
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.10%
|
| Principal forgiveness | Corporate borrowers | Non-recourse Loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Principal forgiveness | Corporate borrowers | Non-recourse Loans | The Americas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Principal forgiveness | Corporate borrowers | Other than non-recourse loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 12
|
¥ 16
|
¥ 932
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.10%
|
| Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Real estate companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.00%
|
| Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 12
|
¥ 16
|
¥ 932
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
0.10%
|
| Principal forgiveness | Loans to Equity Method Investees |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
¥ 0
|
| % of total class of financing receivable |
|
0.00%
|
0.00%
|
| Principal forgiveness | Net investment in leases |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 12
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Principal forgiveness | Net investment in leases | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Principal forgiveness | Net investment in leases | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 12
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction and term extension |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 1,578
|
¥ 14,545
|
|
| % of total class of financing receivable |
0.00%
|
0.30%
|
|
| Combination - interest rate reduction and term extension | Consumer borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 83
|
¥ 138
|
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Consumer borrowers | Other |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 83
|
¥ 138
|
|
| % of total class of financing receivable |
0.20%
|
0.30%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 1,495
|
¥ 14,407
|
|
| % of total class of financing receivable |
0.10%
|
0.80%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Non-recourse Loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Non-recourse Loans | The Americas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 1,495
|
¥ 14,407
|
|
| % of total class of financing receivable |
0.10%
|
1.10%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 130
|
¥ 0
|
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 1,701
|
|
| % of total class of financing receivable |
|
1.30%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
¥ 0
|
|
| % of total class of financing receivable |
0.00%
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 1,365
|
¥ 12,706
|
|
| % of total class of financing receivable |
0.30%
|
2.20%
|
|
| Combination - interest rate reduction and term extension | Loans to Equity Method Investees |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
|
¥ 0
|
|
| % of total class of financing receivable |
|
0.00%
|
|
| Combination - interest rate reduction and term extension | Net investment in leases |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction and term extension | Net investment in leases | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction and term extension | Net investment in leases | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 2,620
|
|
|
| % of total class of financing receivable |
0.10%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Consumer borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Consumer borrowers | Other |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Corporate borrowers |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 2,620
|
|
|
| % of total class of financing receivable |
0.10%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Corporate borrowers | Other than non-recourse loans |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 2,620
|
|
|
| % of total class of financing receivable |
0.20%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 2,620
|
|
|
| % of total class of financing receivable |
0.50%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Net investment in leases |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Net investment in leases | Japan |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|
| Combination - interest rate reduction, term extension and principal forgiveness | Net investment in leases | Overseas |
|
|
|
| Financing Receivable, Modifications [Line Items] |
|
|
|
| Amortized cost basis |
¥ 0
|
|
|
| % of total class of financing receivable |
0.00%
|
|
|