| Gain (loss) on hedge ineffectiveness | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total gain (loss) on hedge ineffectiveness | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The gain (loss) on hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |