| Increases in the present value of defined benefit obligation or net defined benefit liability resulting from business combinations should be tagged with a positive value; decreases resulting from business disposals should be tagged with a negative value. Increases in the fair value of plan assets resulting from business combinations represent a decrease in net defined benefit liability (equivalent to an increase in net defined benefit asset) and should be tagged with a negative value; decreases in the fair value of plan assets resulting from business disposals represent an increase in the net defined benefit liability and should be tagged with a positive value. | en | http://www.xbrl.org/2003/role/commentaryGuidance | http://www.xbrl.org/2003/role/link |
| Increase (decrease) in net defined benefit liability (asset) resulting from business combinations and disposals | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The increase (decrease) in the net defined benefit liability (asset) resulting from business combinations and disposals. [Refer: Business combinations [member]; Net defined benefit liability (asset)] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |