| Name | StatementScenarioAxis |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:dimensionItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Scenario [Axis] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Information by scenario reported, distinguishing information from actual fact. Includes, but is not limited to, pro forma and forecast. Excludes actual facts. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| SourceName | Retirement Benefits:Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2020 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2019-10 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| SourceName | Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-10 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | Information by scenario to be reported. Scenarios distinguish among different kinds of business reporting facts, as for example actual versus budgeted figures. | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Topic | 450 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| SubTopic | 20 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Section | 50 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Paragraph | 10 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| URI | http://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Publisher | FASB | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Topic | 855 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| SubTopic | 10 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Section | 50 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Paragraph | 3 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| URI | http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662 | http://www.xbrl.org/2003/role/recommendedDisclosureRef |
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 715 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 80 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 50 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 5 | http://www.xbrl.org/2003/role/disclosureRef |
| Subparagraph | (f)(3) | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:MultiemployerPlansMinimumContribution | dep-concept-deprecatedConcept | http://fasb.org/us-gaap/role/deprecated/deprecated | |
srt:ScenarioUnspecifiedDomain | parent-child | http://fasb.org/us-gaap/role/statement/CommonDomainMembers | |
srt:ScenarioUnspecifiedDomain | dimension-default | http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable | |
srt:ScenarioUnspecifiedDomain | dimension-domain | http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable | |
srt:ScenarioUnspecifiedDomain | parent-child | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits | |
srt:ScenarioUnspecifiedDomain | dimension-default | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfMultiemployerPlansTable | |
srt:ScenarioUnspecifiedDomain | dimension-domain | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfMultiemployerPlansTable |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:StatementTable | parent-child | http://fasb.org/us-gaap/role/statement/CommonDomainMembers | |
us-gaap:StatementTable | hypercube-dimension | http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable | |
us-gaap:ScheduleOfMultiemployerPlansTable | parent-child | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits | |
us-gaap:ScheduleOfMultiemployerPlansTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfMultiemployerPlansTable |