| elementCreationTaxonomyVersion | 2017 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Note | Member element for specific country is contained within domain identified in tin-part:AlternateElement. Member element for specific country is intended to be included in Definition Linkbase as child of this member element, if information is disaggregated by foreign plan. If information is not disaggregated or specifically identified by foreign plan, then this member element is intended to be used in instance document. | http://fasb.org/us-gaap/role/tin/usage |
| AlternateElement | country:AllCountriesDomain | http://fasb.org/us-gaap/role/tin/usage |
| Source | Taxonomy Implementation Guide | http://fasb.org/us-gaap/role/tin/resource |
| SourceName | Retirement Benefits-Phase 1 | http://fasb.org/us-gaap/role/tin/resource |
| pdfURI | https://www.fasb.org/retirementbenefitsphase1 | http://fasb.org/us-gaap/role/tin/resource |
| SourceName | Retirement Benefits:Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2020 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 715 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 80 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 35 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 1 | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | https://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 715 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 80 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 11 | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | https://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 715 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 80 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 9 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (b) | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | https://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 | http://www.xbrl.org/2009/role/commonPracticeRef |