| r0.c0 | Debt-equivalent capital accounts/ | de-gaap-ci:table.kke.debtCreditAccounts | xbrli:stringItemType | duration | * | * | * |
| r1.c0 | Changes in debt-equivalent capital accounts [dimension]/ | de-gaap-ci:piTitle.debtCapitalAccounts | xbrli:stringItemType | duration | * | * | * |
| r2.c0 | Closing balance capital account - debt-equivalent capital (statement of changes in capital accounts of commercial partnerships)/ | de-gaap-ci:table.kke.sumDebtCapitalAccounts.sumYearEnd | xbrli:monetaryItemType | duration | * | * | * |
| r3.c0 | Opening balance capital account (statement of changes in capital accounts of commercial partnerships)/ | de-gaap-ci:table.kke.sumDebtCapitalAccounts.sumYearEnd.begin | xbrli:monetaryItemType | duration | * | * | * |
| r4.c0 | Capital increase/ | de-gaap-ci:table.kke.sumDebtCapitalAccounts.sumYearEnd.increase | xbrli:monetaryItemType | duration | * | * | * |
| r5.c0 | Capital decrease/ | de-gaap-ci:table.kke.sumDebtCapitalAccounts.sumYearEnd.decrease | xbrli:monetaryItemType | duration | * | * | * |