| Cash payments for futures contracts, forward contracts, option contracts and swap contracts, classified as investing activities | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Cash payments for futures contracts, forward contracts, option contracts and swap contracts | en | http://www.xbrl.org/2009/role/negatedTerseLabel | http://www.xbrl.org/2003/role/link |
| The cash outflow for futures contracts, forward contracts, option contracts and swap contracts except when the contracts are held for dealing or trading purposes or the payments are classified as financing activities. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Pagamenti per contratti future, contratti forward, contratti di opzione e contratti swap, classificati come attività di investimento | it | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| I flussi finanziari in uscita per contratti future, contratti forward, contratti di opzione e contratti swap eccetto quando i contratti sono posseduti a scopo commerciale o di negoziazione, o i pagamenti rientrano nell'attività di finanziamento. | it | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Pagamenti per contratti future, contratti forward, contratti di opzione e contratti swap | it | http://www.xbrl.org/2009/role/negatedTerseLabel | http://www.xbrl.org/2003/role/link |