| The increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from the return on those rights, excluding amounts included in interest income or expense. [Refer: Reimbursement rights related to defined benefit obligation, at fair value; Increase in reimbursement rights related to defined benefit obligation, resulting from interest income] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from return on reimbursement rights, excluding interest income or expense | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |