| Decrease through benefits paid, defined benefit obligation, at present value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decrease through benefits paid, defined benefit obligation, at present value | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease in the present value of a defined benefit obligation resulting from benefits paid. [Refer: Defined benefit obligation, at present value] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |