| Eigenkapitalspiegel nach DRS 22 (Kapitalgesellschaft) [Tabelle] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Konzerneigenkapitalspiegel nach DRS 22 (Kapitalgesellschaft) [Tabelle] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Eigenkapitalspiegel nach DRS 22 (Kapitalgesellschaft) [Tabelle] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Tabelle | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Konzerneigenkapitalspiegel [Tabelle] | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Tabelle | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Statement of changes in equity, GAS 22 (corporation) [Table] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Statement of changes in group equity, GAS 22 (corporation) [Table] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Statement of changes in equity, GAS 22 (corporation) [Table] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Table | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |