XML 105 R102.htm IDEA: XBRL DOCUMENT v3.25.3
Accumulated Other Comprehensive Income (Loss) (Amounts Reclassified to Net Income from Accumulated Other Comprehensive Income (loss)) (Detail) - JPY (¥)
¥ in Millions
 6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Life insurance costs ¥ (220,628) ¥ (166,863)
Interest expense 93,811 83,717
Income tax (expense) or benefit (116,622) (74,862)
Net Income 274,860 182,129
Reclassification adjustment included in net income | Net unrealized gains (losses) on investment in securities    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total before income tax 6,481 4,812
Income tax (expense) or benefit (1,767) (1,380)
Net Income 4,714 3,432
Reclassification adjustment included in net income | Net unrealized gains (losses) on investment in securities | Sales of debt securities    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Gains on investment securities and dividend (3,879) 750
Life insurance premiums and related investment income 571 (113)
Reclassification adjustment included in net income | Net unrealized gains (losses) on investment in securities | Amortization of debt securities    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Finance revenues 3,666 1,250
Life insurance premiums and related investment income 6,240 2,925
Reclassification adjustment included in net income | Net unrealized gains (losses) on investment in securities | Others    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Write-downs of securities (117)  
Reclassification adjustment included in net income | Debt valuation adjustments    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Life insurance costs 5 2
Total before income tax 5 2
Income tax (expense) or benefit (1) (1)
Net Income 4 1
Reclassification adjustment included in net income | Defined benefit pension plans    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of prior service credit 169 198
Amortization of net actuarial loss 71 47
Amortization of transition obligation 0 (1)
Total before income tax 240 244
Income tax (expense) or benefit (69) (70)
Net Income 171 174
Reclassification adjustment included in net income | Foreign currency translation adjustments    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Gains on sales of subsidiaries and equity method investments and liquidation losses, net 7,042 903
Total before income tax 9,823 (7,522)
Income tax (expense) or benefit (3,134) 2,332
Net Income 6,689 (5,190)
Reclassification adjustment included in net income | Foreign currency translation adjustments | Foreign exchange contracts    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Gains on sales of subsidiaries and equity method investments and liquidation losses, net/Interest expense/Other (income) and expense 2,781 (8,425)
Reclassification adjustment included in net income | Net unrealized gains (losses) on derivative instruments    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total before income tax 4,925 (6,230)
Income tax (expense) or benefit (1,417) 1,397
Net Income 3,508 (4,833)
Reclassification adjustment included in net income | Net unrealized gains (losses) on derivative instruments | Interest rate swap agreements    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense 121 68
Reclassification adjustment included in net income | Net unrealized gains (losses) on derivative instruments | Foreign exchange contracts    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense /Other (income) and expense 3,072  
Reclassification adjustment included in net income | Net unrealized gains (losses) on derivative instruments | Foreign currency swap agreements    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense /Other (income) and expense 1,782 (6,294)
Reclassification adjustment included in net income | Net unrealized gains (losses) on derivative instruments | Options held/written and other    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Life insurance premiums and related investment income ¥ (50) ¥ (4)