| Past service cost and gains (losses) arising from settlements, net defined benefit liability (asset) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Net past service cost and gains (losses) arising from settlements, net defined benefit liability (asset) | en | http://www.xbrl.org/2009/role/netLabel | http://www.xbrl.org/2003/role/link |
| The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost and gains (losses) arising from settlements. [Refer: Gains (losses) arising from settlements, net defined benefit liability (asset); Net defined benefit liability (asset)] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Costo de servicios pasados y ganancias (pérdidas) que surgen por liquidaciones, pasivos (activos) por beneficios definidos netos | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Costos por servicios pasados netos y ganancias (pérdidas) que surgen por liquidaciones, pasivos (activos) por beneficios definidos netos | es | http://www.xbrl.org/2009/role/netLabel | http://www.xbrl.org/2003/role/link |