| de | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| de | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| fr | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| fr | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| el | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| el | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| es | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| es | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| et | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| et | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| fi | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| fi | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| it | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| it | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| lt | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| lt | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| lv | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| lv | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| nl | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| nl | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| si | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| si | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| sk | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| sk | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| en | http://www.xbrl.org/2010/role/message |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |
| en | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0020: [('2B2' = "No") and ('1C8'= "No") and ('1C10'="No") and ('1C2'="No")] so '4D9'={$a} must be equal to or greater than '4D10'={$b} |