| Decreases in the present value of defined benefit obligation or net defined benefit liability resulting from contributions by plan participants should be tagged with a positive value; increases in the present value of defined benefit obligation or net defined benefit liability resulting from contributions by plan participants should be tagged with a negative value. Increases in the fair value of plan assets resulting from contributions by plan participants represent a decrease in net defined benefit liability (equivalent to an increase in a net defined benefit asset) and should be tagged with a positive value. | en | http://www.xbrl.org/2003/role/commentaryGuidance | http://www.xbrl.org/2003/role/link |
| Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan by plan participants | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Increase (decrease) in net defined benefit liability (asset) resulting from contributions to plan by plan participants | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |