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Pension Plans (Funded Status of Defined Benefit Pension Plans) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Change in benefit obligation: |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |
Japan |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | ¥ 109,759 | ¥ 111,010 |
Service cost | 5,542 | 5,704 | ¥ 6,058
Interest cost | 1,216 | 731 | 791
Actuarial loss (income) | (3,586) | (6,538) |
Plan participant's contributions | 0 | 0 |
Benefits paid | (5,014) | (4,770) |
Business combinations | 0 | 4,733 |
Divestitures | (2,808) | 0 |
Plan amendments | 0 | (1,111) |
Foreign currency exchange rate change | 0 | 0 |
Benefit obligation at end of year | 105,109 | 109,759 | 111,010
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 136,803 | 137,317 |
Actual return on plan assets | 12,103 | (3,108) |
Employer contribution | 4,195 | 4,162 |
Plan participant's contributions | 0 | 0 |
Benefits paid | (4,392) | (3,913) |
Business combinations | 0 | 2,456 |
Divestitures | (5,608) | 0 |
Plan amendments | 0 | (111) |
Foreign currency exchange rate change | 0 | 0 |
Fair value of plan assets at end of year | 143,101 | 136,803 | 137,317
The funded status of the plans | 37,992 | 27,044 |
Amount recognized in the consolidated balance sheets consists of: |  |  |
Prepaid benefit cost included in other assets | 53,641 | 42,337 |
Accrued benefit liability included in other liabilities | (15,649) | (15,293) |
Net amount recognized | 37,992 | 27,044 |
Overseas plans |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 108,416 | 121,148 |
Service cost | 2,999 | 3,432 | 3,947
Interest cost | 3,395 | 2,309 | 1,329
Actuarial loss (income) | 3,448 | (25,124) |
Plan participant's contributions | 233 | 334 |
Benefits paid | (2,499) | (1,131) |
Business combinations | 0 | 196 |
Divestitures | 0 | 0 |
Plan amendments | 360 | (285) |
Foreign currency exchange rate change | 13,582 | 7,537 |
Benefit obligation at end of year | 129,934 | 108,416 | 121,148
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 122,204 | 127,251 |
Actual return on plan assets | 15,799 | (15,709) |
Employer contribution | 2,262 | 2,927 |
Plan participant's contributions | 233 | 334 |
Benefits paid | (2,314) | (962) |
Business combinations | 0 | 175 |
Divestitures | 0 | 0 |
Plan amendments | 0 | 0 |
Foreign currency exchange rate change | 15,619 | 8,188 |
Fair value of plan assets at end of year | 153,803 | 122,204 | ¥ 127,251
The funded status of the plans | 23,869 | 13,788 |
Amount recognized in the consolidated balance sheets consists of: |  |  |
Prepaid benefit cost included in other assets | 25,723 | 15,465 |
Accrued benefit liability included in other liabilities | (1,854) | (1,677) |
Net amount recognized | ¥ 23,869 | ¥ 13,788 |

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