| 売買目的有価証券運用損 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 売買目的有価証券運用損、経常費用、保険業 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| (うち売買目的有価証券運用損) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ins/role/label | http://www.xbrl.org/2003/role/link |
| Net loss on trading securities | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Net loss on trading securities - OE - INS | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Net loss on trading securities | en | http://disclosure.edinet-fsa.go.jp/jppfs/ins/role/label | http://www.xbrl.org/2003/role/link |