| Name | nt.segmGeographical.Business.Assets |
|---|---|
| Namespace | http://www.xbrl.de/taxonomies/de-gaap-ci-2020-04-01 |
| Prefix | de-gaap-ci |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Vermögen je Produkt- oder Dienstleistungsgruppe der Region | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Vermögen je Produkt- oder Dienstleistungsgruppe der Region | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Assets of geographical segment per product of services group | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Assets of territory per product of services group | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Name | DRS 3 | http://www.xbrl.org/2003/role/reference |
| Paragraph | 38 | http://www.xbrl.org/2003/role/reference |
| Name | Relation Type | Role | |
|---|---|---|---|
de-gaap-ci:nt.segmGeographical.Business | parent-child | http://www.xbrl.de/taxonomies/de-gaap-ci/role/notes |