| Deferred tax liability (asset) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Deferred tax liability (asset) at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Deferred tax liability (asset) at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| Net deferred tax liability (asset) | en | http://www.xbrl.org/2009/role/netLabel | http://www.xbrl.org/2003/role/link |
| The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Uppskjuten skatteskuld (skattefordran) | sv | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Beloppet för uppskjutna skatteskulder eller skattefordringar. [Se: Uppskjutna skatteskulder; Uppskjutna skattefordringar] | sv | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Uppskjuten skatteskuld (skattefordran) vid periodens början | sv | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Uppskjuten skatteskuld (skattefordran) vid periodens slut | sv | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| Uppskjuten skatteskuld (skattefordran) netto | sv | http://www.xbrl.org/2009/role/netLabel | http://www.xbrl.org/2003/role/link |