Severance Indemnities and Pension Plans (Amounts Recognized in Accumulated OCI) (Detail) - JPY (¥)
¥ in Millions |
Mar. 31, 2022 |
Mar. 31, 2021 |
| Domestic, Japan | Pension benefits and SIPs |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Net actuarial loss (gain) |
¥ (18,183)
|
¥ 1,557
|
| Prior service cost |
(2,845)
|
(3,072)
|
| Gross amount recognized in Accumulated OCI |
(21,028)
|
(1,515)
|
| Taxes |
(36,389)
|
(41,639)
|
| Net amount recognized in Accumulated OCI |
(57,417)
|
(43,154)
|
| Foreign offices and subsidiaries | Pension benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Net actuarial loss (gain) |
47,093
|
96,807
|
| Prior service cost |
(3,742)
|
(6,167)
|
| Gross amount recognized in Accumulated OCI |
43,351
|
90,640
|
| Taxes |
(12,092)
|
(23,900)
|
| Net amount recognized in Accumulated OCI |
31,259
|
66,740
|
| Foreign offices and subsidiaries | Other benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Net actuarial loss (gain) |
(1,070)
|
3,255
|
| Prior service cost |
(1,650)
|
(1,869)
|
| Gross amount recognized in Accumulated OCI |
(2,720)
|
1,386
|
| Taxes |
616
|
(489)
|
| Net amount recognized in Accumulated OCI |
¥ (2,104)
|
¥ 897
|