| Wertentwicklung des Anlagenspiegels (brutto) [Dimension] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Wertentwicklung | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Primäre (werthaltige) Dimension | de | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Changes in fixed assets (gross) [dimension] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Changes | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Primary dimension (containing amounts) | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |