| Name | net_addition.interest |
|---|---|
| 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 |
|---|---|---|---|
| Zugänge, davon aktivierte Zinsen für Fremdkapital (Nettomethode) | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| davon aktivierte Zinsen für Fremdkapital | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Aquisitions, of which capitalised interest for debt-equivalent capital (net method) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| of which capitalised interest for debt-equivalent capital | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Name | DRS 24 | http://www.xbrl.org/2003/role/reference |
| Paragraph | 136 | http://www.xbrl.org/2003/role/reference |
| ValidSince | 2016-01-01 | http://www.xbrl.org/2003/role/reference |
| ValidThrough | 2017-12-30 | http://www.xbrl.org/2003/role/reference |
| Name | HGB | http://www.xbrl.org/2003/role/reference |
| Paragraph | 284 | http://www.xbrl.org/2003/role/reference |
| Subparagraph | 3 | http://www.xbrl.org/2003/role/reference |
| Clause | 4 | http://www.xbrl.org/2003/role/reference |
| legalFormEU | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| legalFormKSt | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| legalFormPG | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| typeOperatingResult | neutral | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
de-gaap-ci:net_addition | parent-child | http://www.xbrl.de/taxonomies/de-gaap-ci/role/notes | |
de-gaap-ci:net_addition | domain-member | http://www.xbrl.de/taxonomies/de-gaap-ci/role/notesTableStatementOfChangesInFixedAssetsNet |