| Decrease through benefits paid, reimbursement rights, at fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decrease through benefits paid, reimbursement rights, at fair value | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease in the fair value of reimbursement rights resulting from benefits paid. [Refer: At fair value [member]; Reimbursement rights, at fair value] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |