| Valuation and translation adjustments | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Valuation and translation adjustments | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| Accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| Total valuation and translation adjustments | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total accumulated other comprehensive income | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/totalLabel | http://www.xbrl.org/2003/role/link |
| 評価・換算差額等 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 評価・換算差額等 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| 評価・換算差額等合計 | ja | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額合計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/totalLabel | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額合計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/totalLabel | http://www.xbrl.org/2003/role/link |
| その他の包括利益累計額合計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/totalLabel | http://www.xbrl.org/2003/role/link |