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v3.23.2

Accumulated Other Comprehensive Income (Loss) (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Statement [Line Items] |  |  |
Beginning Balance | ¥ 3,371,401 | ¥ 3,103,144 | ¥ 3,065,835
Total other comprehensive income (loss) | 8,713 | 76,744 | 34,277
Ending Balance | 3,427,300 | 3,371,401 | 3,103,144
Net unrealized gains (losses) on investment in securities |  |  |
Statement [Line Items] |  |  |
Beginning Balance | (72,892) | (16,208) | (5,001)
Net unrealized gains (losses) | (109,745) | (52,477) | (11,188)
Reclassification adjustment included in net income, net of tax | (421) | (4,207) | 6
Total other comprehensive income (loss) | (110,166) | (56,684) | (11,182)
Transaction with noncontrolling interests | 0 | 0 |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 0 | 0 | 25
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | (24) |  | 0
Ending Balance | (183,034) | (72,892) | (16,208)
Debt Valuation Adjustments |  |  |
Statement [Line Items] |  |  |
Beginning Balance | 221 | 558 | 1,457
Net unrealized gains (losses) | 67 | (311) | (826)
Reclassification adjustment included in net income, net of tax | (13) | (26) | (73)
Total other comprehensive income (loss) | 54 | (337) | (899)
Transaction with noncontrolling interests | 0 | 0 |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 |  | 0
Ending Balance | 275 | 221 | 558
Defined benefit pension plans |  |  |
Statement [Line Items] |  |  |
Beginning Balance | (8,072) | (21,073) | (26,375)
Net unrealized gains (losses) | 4,659 | 12,626 | 4,511
Reclassification adjustment included in net income, net of tax | (211) | 376 | 819
Total other comprehensive income (loss) | 4,448 | 13,002 | 5,330
Transaction with noncontrolling interests | 0 | 0 |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | (7) | 1 | 28
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 |  | 0
Ending Balance | (3,617) | (8,072) | (21,073)
Foreign currency translation adjustments |  |  |
Statement [Line Items] |  |  |
Beginning Balance | 61,914 | (36,456) | (72,471)
Net unrealized gains (losses) | 90,616 | 105,079 | 32,180
Reclassification adjustment included in net income, net of tax | 4,091 | 614 | 4,066
Total other comprehensive income (loss) | 94,707 | 105,693 | 36,246
Transaction with noncontrolling interests | 2,903 | (1,472) |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 3,637 | 5,851 | 511
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | (25) |  | (280)
Ending Balance | 155,912 | 61,914 | (36,456)
Net unrealized gains (losses) on derivative instruments |  |  |
Statement [Line Items] |  |  |
Beginning Balance | 2,788 | (11,471) | (16,142)
Net unrealized gains (losses) | 18,232 | 10,634 | (997)
Reclassification adjustment included in net income, net of tax | 1,438 | 4,436 | 5,779
Total other comprehensive income (loss) | 19,670 | 15,070 | 4,782
Transaction with noncontrolling interests | 1,493 | (3) |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 1,868 | 808 | 111
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 |  | 0
Ending Balance | 22,083 | 2,788 | (11,471)
AOCI Attributable to Parent |  |  |
Statement [Line Items] |  |  |
Beginning Balance | (16,041) | (84,650) | (118,532)
Total other comprehensive income (loss) | 8,713 | 76,744 | 34,277
Transaction with noncontrolling interests | 4,396 | (1,475) |
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 5,498 | 6,660 | 675
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | (49) |  | (280)
Ending Balance | ¥ (8,381) | ¥ (16,041) | ¥ (84,650)

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