| Remaining unamortised gains (losses) arising on buying reinsurance | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Remaining unamortised gains (losses) arising on buying reinsurance at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Remaining unamortised gains (losses) arising on buying reinsurance at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The amount of unamortised deferred gains (losses) arising from the purchase of reinsurance. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Gnóthachain (caillteanais) gan amúchadh a eascraíonn ar athárachas a cheannach | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Méid an ghnóthachain (caillteanais) gan amúchadh a eascraíonn as athárachas a cheannach. | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Gnóthachain (caillteanais) gan amúchadh a eascraíonn ar athárachas a cheannach ag tús na tréimhse | ga | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Gnóthachain (caillteanais) gan amúchadh a eascraíonn ar athárachas a cheannach ag deireadh na tréimhse | ga | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |