| Increase (decrease) in net assets available for benefits | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total increase (decrease) in net assets available for benefits | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The increase (decrease) in net assets available for benefits. Net assets available for benefits are assets of a retirement benefit plan less liabilities other than the actuarial present value of promised retirement benefits. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Creșterea (reducerea) activelor nete disponibile pentru beneficii | ro | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Creșterea (reducerea) activelor nete disponibile pentru beneficii. Activele nete disponibile pentru beneficii sunt activele unui plan de pensii minus datoriile, altele decât valoarea actualizată actuarială a pensiilor promise. | ro | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Total creștere (reducere) a activelor nete disponibile pentru beneficii | ro | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |