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Credit Quality of Financial Assets and the Allowance for Credit Losses - Summary of Allowance for Credit Losses for Installment Loans (Detail) - JPY (¥) ¥ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | ¥ 67,235 | ¥ 67,851 | ¥ 65,372 | ¥ 71,416 |
Provision (Reversal) | 5,451 | 1,635 | 7,731 | 2,469 |
Allowance of purchased loans during the reporting period | 7,261 | 2,067 | 7,580 | 2,095 |
Charge-offs | (11,225) | (4,014) | (14,706) | (11,840) |
Recoveries | 239 | 361 | 400 | 447 |
Other | 907 | 1,258 | 3,491 | 4,571 |
Ending balance | 69,868 | 69,158 | 69,868 | 69,158 |
Collective (pool) assessment | 54,453 | 52,294 | 54,453 | 52,294 | ¥ 51,759
Individual assessment | 15,415 | 16,864 | 15,415 | 16,864 | 13,613
Net investment in leases |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 16,388 | 16,665 | 15,719 | 16,303 |
Provision (Reversal) | 942 | 123 | 1,717 | 582 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (609) | (650) | (1,234) | (1,430) |
Recoveries | 0 | 18 | 17 | 25 |
Other | 88 | 84 | 590 | 760 |
Ending balance | 16,809 | 16,240 | 16,809 | 16,240 |
Collective (pool) assessment | 12,366 | 12,030 | 12,366 | 12,030 | 12,032
Individual assessment | 4,443 | 4,210 | 4,443 | 4,210 | 3,687
Installment loans and net investment in leases |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 65,580 | 64,875 | 63,890 | 64,134 |
Provision (Reversal) | 5,338 | 1,474 | 7,477 | 2,312 |
Allowance of purchased loans during the reporting period | 7,261 | 2,067 | 7,580 | 2,095 |
Charge-offs | (11,089) | (3,983) | (14,528) | (7,273) |
Recoveries | 234 | 373 | 395 | 432 |
Other | 754 | 1,131 | 3,264 | 4,237 |
Ending balance | 68,078 | 65,937 | 68,078 | 65,937 |
Collective (pool) assessment | 53,751 | 51,665 | 53,751 | 51,665 | 51,211
Individual assessment | 14,327 | 14,272 | 14,327 | 14,272 | 12,679
Other financial assets measured at amortized cost |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,655 | 2,976 | 1,482 | 7,282 |
Provision (Reversal) | 113 | 161 | 254 | 157 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (136) | (31) | (178) | (4,567) |
Recoveries | 5 |  | 5 | 15 |
Recoveries |  | (12) |  |  |
Other | 153 | 127 | 227 | 334 |
Ending balance | 1,790 | 3,221 | 1,790 | 3,221 |
Collective (pool) assessment | 702 | 629 | 702 | 629 | 548
Individual assessment | 1,088 | 2,592 | 1,088 | 2,592 | 934
Consumer | Real estate loans | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 4,003 | 5,725 | 4,092 | 5,716 |
Provision (Reversal) | 30 | (80) | (50) | 0 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (88) | (3) | (144) | (82) |
Recoveries | 38 | 5 | 84 | 13 |
Other | 0 | 1 | 1 | 1 |
Ending balance | 3,983 | 5,648 | 3,983 | 5,648 |
Collective (pool) assessment | 3,613 | 5,153 | 3,613 | 5,153 | 3,644
Individual assessment | 370 | 495 | 370 | 495 | 448
Consumer | Real estate loans | Overseas |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 532 | 471 | 446 | 455 |
Provision (Reversal) | 65 | 1 | 118 | (2) |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 1 | 0 | 1 | 0 |
Other | 8 | (16) | 41 | 3 |
Ending balance | 606 | 456 | 606 | 456 |
Collective (pool) assessment | 575 | 456 | 575 | 456 | 446
Individual assessment | 31 | 0 | 31 | 0 | 0
Consumer | Card loans | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 9,102 | 9,933 | 9,022 | 10,019 |
Provision (Reversal) | 433 | 209 | 753 | 228 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (206) | (158) | (450) | (265) |
Recoveries | 4 | 2 | 8 | 4 |
Other | 0 | 0 | 0 | 0 |
Ending balance | 9,333 | 9,986 | 9,333 | 9,986 |
Collective (pool) assessment | 8,611 | 9,357 | 8,611 | 9,357 | 8,329
Individual assessment | 722 | 629 | 722 | 629 | 693
Consumer | Other | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 8,487 | 5,915 | 7,759 | 5,204 |
Provision (Reversal) | 1,369 | 1,038 | 2,970 | 2,152 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (930) | (460) | (1,806) | (865) |
Recoveries | 1 | 2 | 3 | 4 |
Other | 0 | 0 | 1 | 0 |
Ending balance | 8,927 | 6,495 | 8,927 | 6,495 |
Collective (pool) assessment | 6,487 | 4,167 | 6,487 | 4,167 | 5,337
Individual assessment | 2,440 | 2,328 | 2,440 | 2,328 | 2,422
Consumer | Other | Overseas |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 2,153 | 1,164 | 1,889 | 1,105 |
Provision (Reversal) | 884 | 242 | 1,370 | 286 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (630) | (140) | (1,124) | (206) |
Recoveries | 82 | 0 | 163 | 0 |
Other | 47 | 56 | 238 | 137 |
Ending balance | 2,536 | 1,322 | 2,536 | 1,322 |
Collective (pool) assessment | 1,896 | 1,187 | 1,896 | 1,187 | 1,467
Individual assessment | 640 | 135 | 640 | 135 | 422
Corporate | Non-recourse Loans | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 262 | 65 | 253 | 81 |
Provision (Reversal) | (36) | 17 | (27) | 1 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Other | 0 | 0 | 0 | 0 |
Ending balance | 226 | 82 | 226 | 82 |
Collective (pool) assessment | 226 | 82 | 226 | 82 | 253
Individual assessment | 0 | 0 | 0 | 0 | 0
Corporate | Non-recourse Loans | The Americas |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,727 | 2,235 | 1,494 | 2,691 |
Provision (Reversal) | 98 | (218) | 197 | (944) |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Other | 58 | (148) | 192 | 122 |
Ending balance | 1,883 | 1,869 | 1,883 | 1,869 |
Collective (pool) assessment | 837 | 857 | 837 | 857 | 560
Individual assessment | 1,046 | 1,012 | 1,046 | 1,012 | 934
Corporate | Corporate Real Estate Companies Loans | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 788 | 600 | 777 | 617 |
Provision (Reversal) | 15 | 4 | 23 | (21) |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | (4) | 0 |
Recoveries | 5 | 5 | 13 | 13 |
Other | 1 | 1 | 0 | 1 |
Ending balance | 809 | 610 | 809 | 610 |
Collective (pool) assessment | 705 | 489 | 705 | 489 | 663
Individual assessment | 104 | 121 | 104 | 121 | 114
Corporate | Corporate Real Estate Companies Loans | Overseas |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,044 | 630 | 1,007 | 735 |
Provision (Reversal) | (37) | 54 | (68) | (98) |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | 0 | (14) | 0 | (14) |
Recoveries | 0 | 0 | 0 | 0 |
Other | 14 | 10 | 82 | 57 |
Ending balance | 1,021 | 680 | 1,021 | 680 |
Collective (pool) assessment | 1,021 | 680 | 1,021 | 680 | 1,007
Individual assessment | 0 | 0 | 0 | 0 | 0
Corporate | Corporate Commercial, industrial and other companies | Japan |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 976 | 1,206 | 1,152 | 1,337 |
Provision (Reversal) | 128 | 220 | (29) | 256 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (1) | (107) | (23) | (277) |
Recoveries | 2 | 4 | 4 | 7 |
Other | (1) | 0 | 0 | 0 |
Ending balance | 1,104 | 1,323 | 1,104 | 1,323 |
Collective (pool) assessment | 615 | 475 | 615 | 475 | 477
Individual assessment | 489 | 848 | 489 | 848 | 675
Corporate | Corporate Commercial, industrial and other companies | Overseas |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 18,929 | 18,720 | 19,132 | 18,296 |
Provision (Reversal) | 1,411 | 78 | 434 | 114 |
Allowance of purchased loans during the reporting period | 0 | 0 | 0 | 0 |
Charge-offs | (1,337) | (190) | (2,131) | (1,825) |
Recoveries | 101 | 281 | 101 | 310 |
Other | 539 | 1,150 | 2,107 | 3,144 |
Ending balance | 19,643 | 20,039 | 19,643 | 20,039 |
Collective (pool) assessment | 16,288 | 16,169 | 16,288 | 16,169 | 16,455
Individual assessment | 3,355 | 3,870 | 3,355 | 3,870 | 2,677
Purchased loans |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,189 | 1,546 | 1,148 | 1,575 |
Provision (Reversal) | 36 | (214) | 69 | (242) |
Allowance of purchased loans during the reporting period | 7,261 | 2,067 | 7,580 | 2,095 |
Charge-offs | (7,288) | (2,261) | (7,612) | (2,309) |
Recoveries | 0 | 56 | 1 | 56 |
Other | 0 | (7) | 12 | 12 |
Ending balance | 1,198 | 1,187 | 1,198 | 1,187 |
Collective (pool) assessment | 511 | 563 | 511 | 563 | 541
Individual assessment | ¥ 687 | ¥ 624 | ¥ 687 | ¥ 624 | ¥ 607

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