| Decrease (increase) through settlements, plan assets, at fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Increase (decrease) through settlements, plan assets, at fair value | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease (increase) in the fair value of defined benefit plan assets resulting from settlements. [Refer: At fair value [member]; Plan assets, at fair value; Defined benefit plans [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |