{ "instance": { "tg-20200331.htm": { "axisCustom": 4, "axisStandard": 19, "contextCount": 226, "dts": { "calculationLink": { "local": [ "tg-20200331_cal.xml" ] }, "definitionLink": { "local": [ "tg-20200331_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml", "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml" ] }, "inline": { "local": [ "tg-20200331.htm" ] }, "labelLink": { "local": [ "tg-20200331_lab.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml" ] }, "presentationLink": { "local": [ "tg-20200331_pre.xml" ] }, "referenceLink": { "remote": [ "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml" ] }, "schema": { "local": [ "tg-20200331.xsd" ], "remote": [ "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd", "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd", "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd", "http://www.xbrl.org/2003/xl-2003-12-31.xsd", "http://www.xbrl.org/2003/xlink-2003-12-31.xsd", "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd", "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd", "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd" ] } }, "elementCount": 677, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2019-01-31": 37, "http://www.tredegar.com/20200331": 2, "http://xbrl.sec.gov/dei/2019-01-31": 16, "total": 55 }, "keyCustom": 53, "keyStandard": 275, "memberCustom": 56, "memberStandard": 27, "nsprefix": "tg", "nsuri": "http://www.tredegar.com/20200331", "report": { "R1": { "firstAnchor": null, "groupType": "document", "isDefault": "true", "longName": "0001001 - Document - Document And Entity Information", "role": "http://www.tredegar.com/role/DocumentAndEntityInformation", "shortName": "Document And Entity Information", "subGroupType": "", "uniqueAnchor": null }, "R10": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccounting", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2101101 - Disclosure - Basis Of Presentation", "role": "http://www.tredegar.com/role/BasisOfPresentation", "shortName": "Basis Of Presentation", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccounting", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:GoodwillDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2106102 - Disclosure - Impairment Goodwill Impairment (Notes)", "role": "http://www.tredegar.com/role/ImpairmentGoodwillImpairmentNotes", "shortName": "Impairment Goodwill Impairment (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:GoodwillDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2108103 - Disclosure - Plants Shutdowns, Asset Impairments, Restructurings And Other", "role": "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOther", "shortName": "Plants Shutdowns, Asset Impairments, Restructurings And Other", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InventoryDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2112104 - Disclosure - Inventories", "role": "http://www.tredegar.com/role/Inventories", "shortName": "Inventories", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InventoryDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2115105 - Disclosure - Earnings Per Share", "role": "http://www.tredegar.com/role/EarningsPerShare", "shortName": "Earnings Per Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i6e9addffa103466787f4b794c0e109d3_D20190101-20190331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2123107 - Disclosure - Accumulated Other Comprehensive Income (Loss)", "role": "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "shortName": "Accumulated Other Comprehensive Income (Loss)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i6e9addffa103466787f4b794c0e109d3_D20190101-20190331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsAndOtherNoncurrentAssetsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2127108 - Disclosure - Investments", "role": "http://www.tredegar.com/role/Investments", "shortName": "Investments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsAndOtherNoncurrentAssetsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2130109 - Disclosure - Derivative Financial Instruments", "role": "http://www.tredegar.com/role/DerivativeFinancialInstruments", "shortName": "Derivative Financial Instruments", "subGroupType": "", "uniqueAnchor": null }, "R18": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2136110 - Disclosure - Pension And Other Post-Retirement Benefits", "role": "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefits", "shortName": "Pension And Other Post-Retirement Benefits", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2140111 - Disclosure - Other Income (Expense), Net (Notes)", "role": "http://www.tredegar.com/role/OtherIncomeExpenseNetNotes", "shortName": "Other Income (Expense), Net (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseLiabilityNoncurrent", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1001002 - Statement - Consolidated Balance Sheets", "role": "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "shortName": "Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2145112 - Disclosure - Segment Reporting", "role": "http://www.tredegar.com/role/SegmentReporting", "shortName": "Segment Reporting", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2150113 - Disclosure - Income Taxes", "role": "http://www.tredegar.com/role/IncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2154114 - Disclosure - New Accounting Pronouncements", "role": "http://www.tredegar.com/role/NewAccountingPronouncements", "shortName": "New Accounting Pronouncements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "div", "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2309302 - Disclosure - Plants Shutdowns, Asset Impairments, Restructurings And Other (Tables)", "role": "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherTables", "shortName": "Plants Shutdowns, Asset Impairments, Restructurings And Other (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "us-gaap:InventoryDisclosureTextBlock", "us-gaap:InventoryDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfInventoryCurrentTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2313303 - Disclosure - Inventories (Tables)", "role": "http://www.tredegar.com/role/InventoriesTables", "shortName": "Inventories (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:InventoryDisclosureTextBlock", "us-gaap:InventoryDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfInventoryCurrentTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "span", "div", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2316304 - Disclosure - Earnings Per Share (Tables)", "role": "http://www.tredegar.com/role/EarningsPerShareTables", "shortName": "Earnings Per Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2324306 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables)", "role": "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossTables", "shortName": "Accumulated Other Comprehensive Income (Loss) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "lang": "en-US", "name": "tg:ScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2328307 - Disclosure - Investments kaleo sensitivity table (Tables)", "role": "http://www.tredegar.com/role/InvestmentskaleosensitivitytableTables", "shortName": "Investments kaleo sensitivity table (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2331308 - Disclosure - Derivative Financial Instruments (Tables)", "role": "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables", "shortName": "Derivative Financial Instruments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "tg:ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2337309 - Disclosure - Pension And Other Post-Retirement Benefits (Tables)", "role": "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables", "shortName": "Pension And Other Post-Retirement Benefits (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "tg:ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1002003 - Statement - Consolidated Balance Sheets (Parenthetical)", "role": "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical", "shortName": "Consolidated Balance Sheets (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R30": { "firstAnchor": { "ancestors": [ "div", "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2342311 - Disclosure - Other Income (Expense), Net Other Income (Expense), Net Summary Table (Tables)", "role": "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetSummaryTableTables", "shortName": "Other Income (Expense), Net Other Income (Expense), Net Summary Table (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2346312 - Disclosure - Segment Reporting (Tables)", "role": "http://www.tredegar.com/role/SegmentReportingTables", "shortName": "Segment Reporting (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "span", "div", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2351313 - Disclosure - Income Taxes (Tables)", "role": "http://www.tredegar.com/role/IncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AmortizationOfIntangibleAssets", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404402 - Disclosure - Basis Of Presentation Trade name accelerated amortization (Details)", "role": "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "shortName": "Basis Of Presentation Trade name accelerated amortization (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R34": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:BasisOfAccounting", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AccountsReceivableGrossCurrent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2405403 - Disclosure - Basis Of Presentation - Accounts and Other Receivables (Details)", "role": "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails", "shortName": "Basis Of Presentation - Accounts and Other Receivables (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:BasisOfAccounting", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AccountsReceivableGrossCurrent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:GoodwillImpairmentLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2407404 - Disclosure - Impairment (Details)", "role": "http://www.tredegar.com/role/ImpairmentDetails", "shortName": "Impairment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "div", "us-gaap:GoodwillDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i5af98fbe66ab46a49ce10fd5953b771c_D20200101-20200331", "decimals": "-3", "lang": null, "name": "us-gaap:GoodwillImpairmentLoss", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2410405 - Disclosure - Plants Shutdowns, Asset Impairments, Restructurings And Other (Narrative) (Details)", "role": "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "shortName": "Plants Shutdowns, Asset Impairments, Restructurings And Other (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "div", "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i686580b5925a461f807777d5de8297ad_D20200101-20200331", "decimals": "-5", "lang": null, "name": "tg:OtherRestructuringCostsafterTaxes", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:UnrealizedGainLossOnInvestments", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2411406 - Disclosure - Plants Shutdowns, Asset Impairments, Restructurings And Other (Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities) (Details)", "role": "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "shortName": "Plants Shutdowns, Asset Impairments, Restructurings And Other (Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "ix:continuation", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "tg:LossesAssociatedWithPlantShutdownsAssetImpairmentsRestructuringsUnusualItemsGainsLossesFromSaleOfAssetsOtherItems", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfInventoryCurrentTableTextBlock", "us-gaap:InventoryDisclosureTextBlock", "us-gaap:InventoryDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InventoryFinishedGoodsNetOfReserves", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2414407 - Disclosure - Inventories (Schedule Of Components Of Inventories) (Details)", "role": "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails", "shortName": "Inventories (Schedule Of Components Of Inventories) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfInventoryCurrentTableTextBlock", "us-gaap:InventoryDisclosureTextBlock", "us-gaap:InventoryDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InventoryFinishedGoodsNetOfReserves", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "ix:continuation", "span", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2417408 - Disclosure - Earnings Per Share (Narrative) (Details)", "role": "http://www.tredegar.com/role/EarningsPerShareNarrativeDetails", "shortName": "Earnings Per Share (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "ix:continuation", "span", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:GrossSales", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1003004 - Statement - Consolidated Statements Of Income", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "shortName": "Consolidated Statements Of Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "tg:TotalRevenuesNetOfOtherExpenses", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:WeightedAverageNumberOfSharesOutstandingBasic", "reportCount": 1, "unitRef": "shares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2418409 - Disclosure - Earnings Per Share (Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share) (Details)", "role": "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails", "shortName": "Earnings Per Share (Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2422411 - Disclosure - Maturity of Lease Liability Table (Details)", "role": "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails", "shortName": "Maturity of Lease Liability Table (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R42": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:SellingGeneralAndAdministrativeExpense", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2425412 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)) (Details)", "role": "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "shortName": "Accumulated Other Comprehensive Income (Loss) (Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2426413 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income) (Details)", "role": "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "shortName": "Accumulated Other Comprehensive Income (Loss) (Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "tg:ScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "icc2d6fb6a70e407ea2bed958acf4c54d_D20190101-20190331", "decimals": "-3", "lang": null, "name": "us-gaap:CostOfGoodsAndServicesSold", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i326cecedfa944428a41c15fa63c20cbc_I20200331", "decimals": "3", "first": true, "lang": null, "name": "tg:WeightingofEBITDAMultipleMethodversusDCFMethod", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2429414 - Disclosure - Investments (Narrative) (Details) 1", "role": "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "shortName": "Investments (Narrative) (Details) 1", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i326cecedfa944428a41c15fa63c20cbc_I20200331", "decimals": "3", "first": true, "lang": null, "name": "tg:WeightingofEBITDAMultipleMethodversusDCFMethod", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i9f6ceb115173450d9321b959cdf1e1d6_D20191001-20200930", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2432415 - Disclosure - Derivative Financial Instruments (Narrative) (Details)", "role": "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "shortName": "Derivative Financial Instruments (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i9f6ceb115173450d9321b959cdf1e1d6_D20191001-20200930", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i670f9bf0d62a47808ca932f37f7272fd_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeFairValueOfDerivativeAsset", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2433416 - Disclosure - Derivative Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details)", "role": "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "shortName": "Derivative Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i670f9bf0d62a47808ca932f37f7272fd_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeFairValueOfDerivativeAsset", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "iff7bc715b6ea40bb8da6d6225aac91e3_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2434417 - Disclosure - Derivative Financial Instruments (Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges) (Details)", "role": "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "shortName": "Derivative Financial Instruments (Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "iff7bc715b6ea40bb8da6d6225aac91e3_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i14b0576facde446593c338b3630b3263_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeNotionalAmount", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2435418 - Disclosure - Derivative Financial Instruments Terphane Future Cash Flow Hedges (Details)", "role": "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails", "shortName": "Derivative Financial Instruments Terphane Future Cash Flow Hedges (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i4390ba00ae18470b9327be70503c40cd_I20200331", "decimals": "-3", "lang": null, "name": "us-gaap:DerivativeNotionalAmount", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "span", "div", "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2438419 - Disclosure - Pension And Other Post-Retirement Benefits (Narrative) (Details)", "role": "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "shortName": "Pension And Other Post-Retirement Benefits (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "div", "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1004005 - Statement - Consolidated Statements Of Comprehensive Income (Loss)", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "shortName": "Consolidated Statements Of Comprehensive Income (Loss)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "us-gaap:ComprehensiveIncomeNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "tg:ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock", "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i02b35a18b416473a9e337a4a98ca21f7_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2439420 - Disclosure - Pension And Other Post-Retirement Benefits (Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs) (Details)", "role": "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails", "shortName": "Pension And Other Post-Retirement Benefits (Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "tg:ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock", "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i02b35a18b416473a9e337a4a98ca21f7_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OtherNonoperatingIncomeExpense", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2443421 - Disclosure - Other Income (Expense), Net (Details)", "role": "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails", "shortName": "Other Income (Expense), Net (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R52": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "div", "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:OtherNonoperatingIncomeExpenseNetTotal", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2444422 - Disclosure - Other Income (Expense), Net Other Income (Expense), Net (Details)", "role": "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "shortName": "Other Income (Expense), Net Other Income (Expense), Net (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "div", "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:OtherNonoperatingIncomeExpenseNetTotal", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:DisaggregationOfRevenueTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:NetSales", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2447423 - Disclosure - Segment Reporting (Schedule Of Segment Reporting Information By Segment) (Details)", "role": "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "shortName": "Segment Reporting (Schedule Of Segment Reporting Information By Segment) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "tg:TotalIncomeLossAssociatedWithSegments", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "tg:ScheduleOfIdentifiableAssetsBySegment", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:IdentifiableAssetsBySegmentSubtotal", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2448424 - Disclosure - Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details)", "role": "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "shortName": "Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "tg:ScheduleOfIdentifiableAssetsBySegment", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:IdentifiableAssetsBySegmentSubtotal", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:DisaggregationOfRevenueTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:NetSales", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2449425 - Disclosure - Segment Reporting Schedule of Revenue by Geographic Location (Details)", "role": "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails", "shortName": "Segment Reporting Schedule of Revenue by Geographic Location (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "us-gaap:DisaggregationOfRevenueTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i1ff103589a1e4d6f82a3ccdd0566bbd7_D20200101-20200331", "decimals": "-3", "lang": null, "name": "tg:NetSales", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "tg:EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2452426 - Disclosure - Income Taxes (Narrative) (Details)", "role": "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "shortName": "Income Taxes (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "ifc49873d507b4e608525a3b2ba611288_D20200101-20200331", "decimals": "INF", "lang": null, "name": "tg:EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2453427 - Disclosure - Income Taxes (Schedule Of Effective Income Tax Rate For Continuing Operations) (Details)", "role": "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails", "shortName": "Income Taxes (Schedule Of Effective Income Tax Rate For Continuing Operations) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "ix:continuation", "div", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "3", "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i11790ea2974d44feb455e3e225f70a56_I20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2455428 - Disclosure - New Accounting Pronouncements New Accounting Pronouncements (Details)", "role": "http://www.tredegar.com/role/NewAccountingPronouncementsNewAccountingPronouncementsDetails", "shortName": "New Accounting Pronouncements New Accounting Pronouncements (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R6": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1005006 - Statement - Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical)", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "shortName": "Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R7": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1006007 - Statement - Consolidated Statements Of Cash Flows", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "shortName": "Consolidated Statements Of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i3bfa332aa9ac4a65b8c606ceda2cf985_D20200101-20200331", "decimals": "-3", "lang": null, "name": "us-gaap:Depreciation", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i148e506895aa4cb8aa51a211d870cae7_I20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1007008 - Statement - Consolidated Statements Of Shareholders' Equity", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity", "shortName": "Consolidated Statements Of Shareholders' Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "baseRef": "tg-20200331.htm", "contextRef": "i148e506895aa4cb8aa51a211d870cae7_I20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R9": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1008009 - Statement - Consolidated Statements Of Shareholders' Equity (Parenthetical)", "role": "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical", "shortName": "Consolidated Statements Of Shareholders' Equity (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null } }, "segmentCount": 87, "tag": { "country_AllCountriesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "All Countries [Domain]", "terseLabel": "All Countries [Domain]" } } }, "localname": "AllCountriesDomain", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_BR": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "BRAZIL", "terseLabel": "Brazil", "verboseLabel": "BRAZIL" } } }, "localname": "BR", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_CA": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "CANADA", "terseLabel": "CANADA" } } }, "localname": "CA", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_CN": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "CHINA", "terseLabel": "CHINA" } } }, "localname": "CN", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_HU": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "HUNGARY", "terseLabel": "HUNGARY" } } }, "localname": "HU", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_IN": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "INDIA", "terseLabel": "INDIA" } } }, "localname": "IN", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_NL": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "NETHERLANDS", "terseLabel": "NETHERLANDS" } } }, "localname": "NL", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "country_US": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "UNITED STATES", "terseLabel": "UNITED STATES" } } }, "localname": "US", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.", "label": "Amendment Flag", "terseLabel": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_CurrentFiscalYearEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "End date of current fiscal year in the format --MM-DD.", "label": "Current Fiscal Year End Date", "terseLabel": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentFiscalPeriodFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.", "label": "Document Fiscal Period Focus", "terseLabel": "Document Fiscal Period Focus (Q1,Q2,Q3,FY)" } } }, "localname": "DocumentFiscalPeriodFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.", "label": "Document Fiscal Year Focus", "terseLabel": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.", "label": "Document Period End Date", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentQuarterlyReport": { "auth_ref": [ "r366" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as an quarterly report.", "label": "Document Quarterly Report", "terseLabel": "Document Quarterly Report" } } }, "localname": "DocumentQuarterlyReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r367" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as a transition report.", "label": "Document Transition Report", "terseLabel": "Document Transition Report" } } }, "localname": "DocumentTransitionReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentType": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.", "label": "Document Type", "terseLabel": "Document Type" } } }, "localname": "DocumentType", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_EntityByLocationAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.", "label": "Entity by Location [Axis]", "terseLabel": "Entity by Location [Axis]" } } }, "localname": "EntityByLocationAxis", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "stringItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.", "label": "Entity Central Index Key", "terseLabel": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "centralIndexKeyItemType" }, "dei_EntityCommonStockSharesOutstanding": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.", "label": "Entity Common Stock, Shares Outstanding", "terseLabel": "Entity Common Stock, Shares Outstanding" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "sharesItemType" }, "dei_EntityCurrentReportingStatus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Current Reporting Status", "terseLabel": "Entity Current Reporting Status" } } }, "localname": "EntityCurrentReportingStatus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.", "label": "Entity [Domain]", "terseLabel": "Entity [Domain]", "verboseLabel": "Entity [Domain]" } } }, "localname": "EntityDomain", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company", "terseLabel": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Filer Category", "terseLabel": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.", "label": "Entity Registrant Name", "terseLabel": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.", "label": "Entity Shell Company", "terseLabel": "Entity Shell Company" } } }, "localname": "EntityShellCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).", "label": "Entity Small Business", "terseLabel": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_LegalEntityAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The set of legal entities associated with a report.", "label": "Legal Entity [Axis]", "terseLabel": "Legal Entity [Axis]", "verboseLabel": "Legal Entity [Axis]" } } }, "localname": "LegalEntityAxis", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "stringItemType" }, "dei_LocationDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A domain representing all geographic locations. Depending on the axis, it may contain members that are specific geographies, or synthetic entity-specific geographical groups.", "label": "Location [Domain]", "terseLabel": "Location [Domain]" } } }, "localname": "LocationDomain", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "srt_AsiaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Asia [Member]", "terseLabel": "Asia [Member]" } } }, "localname": "AsiaMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_EnergyAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Energy [Axis]", "terseLabel": "Energy [Axis]" } } }, "localname": "EnergyAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "srt_EnergyDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Energy [Domain]", "terseLabel": "Energy [Domain]" } } }, "localname": "EnergyDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "srt_EuropeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Europe [Member]", "terseLabel": "Europe [Member]" } } }, "localname": "EuropeMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_LatinAmericaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Latin America [Member]", "terseLabel": "Latin America [Member]" } } }, "localname": "LatinAmericaMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_LitigationCaseAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Litigation Case [Axis]", "terseLabel": "Litigation Case [Axis]" } } }, "localname": "LitigationCaseAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_LitigationCaseTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Litigation Case [Domain]", "terseLabel": "Litigation Case [Domain]" } } }, "localname": "LitigationCaseTypeDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_MajorCustomersAxis": { "auth_ref": [ "r144", "r202", "r205", "r351" ], "lang": { "en-US": { "role": { "label": "Customer [Axis]", "terseLabel": "Customer [Axis]" } } }, "localname": "MajorCustomersAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_NameOfMajorCustomerDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Customer [Domain]", "terseLabel": "Customer [Domain]" } } }, "localname": "NameOfMajorCustomerDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r142", "r202", "r203", "r348", "r349" ], "lang": { "en-US": { "role": { "label": "Product and Service [Axis]", "terseLabel": "Product and Service [Axis]" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Product and Service [Domain]", "terseLabel": "Product and Service [Domain]" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statistical Measurement [Axis]", "terseLabel": "Statistical Measurement [Axis]" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statistical Measurement [Domain]", "terseLabel": "Statistical Measurement [Domain]" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_RestatementAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Axis]", "terseLabel": "Restatement [Axis]" } } }, "localname": "RestatementAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "srt_RestatementDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Domain]", "terseLabel": "Restatement [Domain]" } } }, "localname": "RestatementDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "srt_ScenarioUnspecifiedDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Scenario [Domain]", "terseLabel": "Scenario [Domain]" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "srt_SegmentGeographicalDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Geographical [Domain]", "terseLabel": "Geographical [Domain]" } } }, "localname": "SegmentGeographicalDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "srt_StatementGeographicalAxis": { "auth_ref": [ "r143", "r202", "r204", "r350", "r363", "r364" ], "lang": { "en-US": { "role": { "label": "Geographical [Axis]", "terseLabel": "Geographical [Axis]" } } }, "localname": "StatementGeographicalAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "srt_StatementScenarioAxis": { "auth_ref": [ "r198", "r321" ], "lang": { "en-US": { "role": { "label": "Scenario [Axis]", "terseLabel": "Scenario [Axis]" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "stringItemType" }, "tg_A0Domain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "0% [Domain]", "label": "0% [Domain]", "terseLabel": "0% [Domain]" } } }, "localname": "A0Domain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A10.6xDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "10.6x [Domain]", "label": "10.6x [Domain]", "terseLabel": "10.6x [Member]" } } }, "localname": "A10.6xDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A100xMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "10.0x [Domain]", "label": "10.0x [Member]", "terseLabel": "10.0x [Member]" } } }, "localname": "A100xMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A10Domain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "10% [Domain]", "label": "10% [Domain]", "terseLabel": "10% [Domain]" } } }, "localname": "A10Domain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A110xMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "11.0x [Domain]", "label": "11.0x [Member]", "terseLabel": "11.0x [Member]" } } }, "localname": "A110xMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A20Domain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "20% [Domain]", "label": "20% [Domain]", "terseLabel": "20% [Domain]" } } }, "localname": "A20Domain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A30Domain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "30% [Domain]", "label": "30% [Domain]", "terseLabel": "30% [Domain]" } } }, "localname": "A30Domain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A40Domain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "40% [Domain]", "label": "40% [Domain]", "terseLabel": "40% [Domain]" } } }, "localname": "A40Domain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A50DomainDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "50% [Domain] [Domain]", "label": "50% [Domain] [Domain]", "terseLabel": "50% [Domain] [Domain]" } } }, "localname": "A50DomainDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A70xMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "7.0x [Domain]", "label": "7.0x [Member]", "terseLabel": "7.0x [Member]" } } }, "localname": "A70xMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A8.6xDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "8.6x [Domain]", "label": "8.6x [Domain]", "terseLabel": "8.6x [Member]" } } }, "localname": "A8.6xDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A80xMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "8.0x [Domain]", "label": "8.0x [Member]", "terseLabel": "8.0x [Member]" } } }, "localname": "A80xMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_A90xMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "9.0x [Domain]", "label": "9.0x [Member]", "terseLabel": "9.6x [Member]" } } }, "localname": "A90xMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_ASC8402018MinimumLeasePaymentsTableAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "ASC 840 2018 Minimum Lease Payments Table [Abstract]", "label": "ASC 840 2018 Minimum Lease Payments Table [Abstract]", "terseLabel": "ASC 840 2018 Minimum Lease Payments Table [Abstract]" } } }, "localname": "ASC8402018MinimumLeasePaymentsTableAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_AacoaIncMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AACOA, Inc. [Member]", "label": "Aacoa Inc [Member]", "terseLabel": "Aacoa Inc [Member]" } } }, "localname": "AacoaIncMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AacoaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AACOA [Member]", "label": "Aacoa [Member]", "terseLabel": "AACOA" } } }, "localname": "AacoaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AcceleratedDepreciationExpectedCost": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Expected costs associated with accelerated depreciation that the Company anticipates to incur in connection with a restructuring project", "label": "AcceleratedDepreciationExpectedCost", "terseLabel": "AcceleratedDepreciationExpectedCost" } } }, "localname": "AcceleratedDepreciationExpectedCost", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_AcceleratedDepreciationExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Depreciation expense that has been accelerated due to a change in useful life associated with restructuring activities.", "label": "Accelerated Depreciation Expense", "terseLabel": "Accelerated Depreciation Expense" } } }, "localname": "AcceleratedDepreciationExpense", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_AccruedExpensesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Accrued Expenses [Member]", "label": "Accrued Expenses [Member]", "terseLabel": "Accrued Expenses [Member]" } } }, "localname": "AccruedExpensesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AlleghanyandBathCountyVirginiaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Alleghany and Bath County, Virginia", "label": "Alleghany and Bath County, Virginia [Member]", "terseLabel": "Alleghany and Bath County, Virginia [Member]" } } }, "localname": "AlleghanyandBathCountyVirginiaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumExtrusionsManufacturingFacilityInCarthageTennesseeMemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum Extrusions Manufacturing Facility In Carthage Tennessee [Member] [Member]", "label": "Aluminum Extrusions Manufacturing Facility In Carthage Tennessee [Member] [Member]", "terseLabel": "Aluminum Extrusions Manufacturing Facility In Carthage Tennessee [Member] [Member]" } } }, "localname": "AluminumExtrusionsManufacturingFacilityInCarthageTennesseeMemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumExtrusionsManufacturingFacilityInKentlandIndianaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum Extrusions Manufacturing Facility in Kentland, Indiana [Member]", "label": "Aluminum Extrusions Manufacturing Facility In Kentland Indiana [Member]", "terseLabel": "Aluminum Extrusions Manufacturing Facility In Kentland Indiana [Member]" } } }, "localname": "AluminumExtrusionsManufacturingFacilityInKentlandIndianaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumExtrusionsManufacturingPlantinElkhartIndianaDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum Extrusions Manufacturing Plant in Elkhart, Indiana [Domain]", "label": "Aluminum Extrusions Manufacturing Plant in Elkhart, Indiana [Domain]", "terseLabel": "Aluminum Extrusions Manufacturing Plant in Elkhart, Indiana [Domain]" } } }, "localname": "AluminumExtrusionsManufacturingPlantinElkhartIndianaDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumExtrusionsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum Extrusions Member.", "label": "Aluminum Extrusions [Member]", "terseLabel": "Aluminum Extrusions [Member]", "verboseLabel": "Aluminum Extrusions [Member]" } } }, "localname": "AluminumExtrusionsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumExtrusionsSubtotalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum Extrusions Subtotal [Member]", "label": "Aluminum Extrusions Subtotal [Member]", "terseLabel": "Aluminum Extrusions Subtotal [Member]" } } }, "localname": "AluminumExtrusionsSubtotalMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_AluminumFuturesContractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aluminum futures contracts.", "label": "Aluminum Futures Contracts [Member]", "terseLabel": "Aluminum Futures Contracts", "verboseLabel": "Aluminum Futures Contracts [Member]" } } }, "localname": "AluminumFuturesContractsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "domainItemType" }, "tg_AmortizationOfPriorServiceCostsAndNetGainsLoss": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails": { "order": 1.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 }, "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": 4.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amortization Of Prior Service Costs And Net Gains Loss", "label": "Amortization Of Prior Service Costs And Net Gains Loss", "negatedTerseLabel": "Amortization of prior service costs, (gains) losses and net transition asset", "terseLabel": "Amortization Of Prior Service Costs And Net Gains Loss", "verboseLabel": "Actuarial gain (loss) and prior service costs, before taxes" } } }, "localname": "AmortizationOfPriorServiceCostsAndNetGainsLoss", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "tg_AnnualNetCostsMismatchTranslationExposureRealvsUSDollar": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar", "label": "Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar", "terseLabel": "Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar" } } }, "localname": "AnnualNetCostsMismatchTranslationExposureRealvsUSDollar", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_Apr19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Apr-19 [Member]", "label": "Apr-19 [Member]", "terseLabel": "Apr-19 [Member]" } } }, "localname": "Apr19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Apr20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Apr-20 [Member] [Member]", "label": "Apr-20 [Member] [Member]", "terseLabel": "Apr-20 [Member] [Member]" } } }, "localname": "Apr20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Asset Impairment And Costs Associated With Exit And Disposal Activities", "label": "Asset Impairment And Costs Associated With Exit And Disposal Activities", "terseLabel": "Asset Impairment And Costs Associated With Exit And Disposal Activities" } } }, "localname": "AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivities", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesCostofGoodsSold": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Asset Impairment And Costs Associated With Exit And Disposal Activities - Cost of Goods Sold", "label": "Asset Impairment And Costs Associated With Exit And Disposal Activities - Cost of Goods Sold", "terseLabel": "Asset Impairment And Costs Associated With Exit And Disposal Activities - Cost of Goods Sold" } } }, "localname": "AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesCostofGoodsSold", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amounts charged against earnings for incurred and estimated one-time, nonrecurring costs assoicated with asset impariments and exit and disposal activities.", "label": "Asset Impairment And Costs Associated With Exit And Disposal Activities - impairment Line", "terseLabel": "Asset impairments and costs associated with exit and disposal activities, net of adjustments" } } }, "localname": "AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_AssetImpairmentandOtherPlantShutdownRelatedCosts": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Asset Impairment and Other Plant Shutdown Related Costs", "label": "Asset Impairment and Other Plant Shutdown Related Costs", "verboseLabel": "Pretax loss for asset impairments" } } }, "localname": "AssetImpairmentandOtherPlantShutdownRelatedCosts", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_Aug19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aug-19 [Member]", "label": "Aug-19 [Member]", "terseLabel": "Aug-19 [Member]" } } }, "localname": "Aug19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Aug20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Aug-20 [Member] [Member]", "label": "Aug-20 [Member] [Member]", "terseLabel": "Aug-20 [Member] [Member]" } } }, "localname": "Aug20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_AutomotiveMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Automotive [Member] [Member]", "label": "Automotive [Member]", "terseLabel": "Automotive [Member]" } } }, "localname": "AutomotiveMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_BasisOfPresentationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Basis Of Presentation [Abstract]", "label": "Basis Of Presentation [Abstract]", "terseLabel": "Basis Of Presentation [Abstract]" } } }, "localname": "BasisOfPresentationAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_BrazilianMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Brazilian [Member]", "label": "Brazilian [Member]", "terseLabel": "Brazilian [Member]" } } }, "localname": "BrazilianMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_BrazilianTaxCreditDeductionPeriod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Brazilian Tax Credit Deduction Period", "label": "BrazilianTaxCreditDeductionPeriod", "terseLabel": "BrazilianTaxCreditDeductionPeriod" } } }, "localname": "BrazilianTaxCreditDeductionPeriod", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "durationItemType" }, "tg_BrazilianTaxHolidayIncentivePeriod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Brazilian Tax Holiday Incentive Period", "label": "Brazilian Tax Holiday Incentive Period", "terseLabel": "Brazilian Tax Holiday Incentive Period" } } }, "localname": "BrazilianTaxHolidayIncentivePeriod", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "durationItemType" }, "tg_BusinessDevelopmentExpenses": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Non-recurring expenses associated with business development projects", "label": "Business Development Expenses", "terseLabel": "Business Development Expenses" } } }, "localname": "BusinessDevelopmentExpenses", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_BusinesssCombinationSettlementofEscrowAccount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Businesss Combination Settlement of Escrow Account", "label": "Businesss Combination Settlement of Escrow Account", "terseLabel": "Businesss Combination Settlement of Escrow Account" } } }, "localname": "BusinesssCombinationSettlementofEscrowAccount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails" ], "xbrltype": "monetaryItemType" }, "tg_CapitalExpendituresRestructuringProject": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Capital expenditures incurred as part of a restructuring project", "label": "Capital Expenditures Restructuring Project", "terseLabel": "Capital Expenditures Restructuring Project" } } }, "localname": "CapitalExpendituresRestructuringProject", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_CashCashEquivalentsandRestrictedCashReconciliationTableAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cash, Cash Equivalents and Restricted Cash Reconciliation Table [Abstract]", "label": "Cash, Cash Equivalents and Restricted Cash Reconciliation Table [Abstract]", "terseLabel": "Cash, Cash Equivalents and Restricted Cash Reconciliation Table [Abstract]" } } }, "localname": "CashCashEquivalentsandRestrictedCashReconciliationTableAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_CashFlowHedgeMaturityDateAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cash Flow Hedge Maturity Date [Axis]", "label": "Cash Flow Hedge Maturity Date [Axis]", "terseLabel": "Cash Flow Hedge Maturity Date [Axis]" } } }, "localname": "CashFlowHedgeMaturityDateAxis", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "tg_CashFlowHedgeMaturityDateDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Cash Flow Hedge Maturity Date [Axis]", "label": "Cash Flow Hedge Maturity Date [Domain]", "terseLabel": "Cash Flow Hedge Maturity Date [Domain]" } } }, "localname": "CashFlowHedgeMaturityDateDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_CommitmentUnderCashFlowHedgesMass": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commitment Under Cash Flow Hedges, Mass", "label": "Commitment Under Cash Flow Hedges, Mass", "terseLabel": "Commitment Under Cash Flow Hedges, Mass" } } }, "localname": "CommitmentUnderCashFlowHedgesMass", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "weightItemType" }, "tg_ConsumerDurablesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Consumer Durables [Member]", "label": "Consumer Durables [Member]", "terseLabel": "Consumer Durables [Member]" } } }, "localname": "ConsumerDurablesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_CorporateExpensesNet": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Corporate expenses, net", "label": "Corporate Expenses, Net", "terseLabel": "Corporate expenses, net" } } }, "localname": "CorporateExpensesNet", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_CorporateMemberDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Corporate [Member] [Domain]", "label": "Corporate [Member] [Domain]", "terseLabel": "Corporate [Member] [Domain]" } } }, "localname": "CorporateMemberDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_CostMethodInvestmentsOtherThanTemporaryImpairmentNetOfTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cost-Method Investments, Other Than Temporary Impairment Net Of Tax", "label": "Cost-Method Investments, Other Than Temporary Impairment Net Of Tax", "terseLabel": "Cost-method investment, OTTI net of tax" } } }, "localname": "CostMethodInvestmentsOtherThanTemporaryImpairmentNetOfTax", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_CumulativeeffectadjustmentforadoptionofstockbasedcompaccountingguidanceAPICAdjustment": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - APIC Adjustment", "label": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - APIC Adjustment", "terseLabel": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - APIC Adjustment" } } }, "localname": "CumulativeeffectadjustmentforadoptionofstockbasedcompaccountingguidanceAPICAdjustment", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "tg_CumulativeeffectadjustmentforadoptionofstockbasedcompaccountingguidanceREAdjustment": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - RE Adjustment", "label": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - RE Adjustment", "terseLabel": "Cumulative effect adjustment for adoption of stock-based comp accounting guidance - RE Adjustment" } } }, "localname": "CumulativeeffectadjustmentforadoptionofstockbasedcompaccountingguidanceREAdjustment", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "tg_CurrentEffectiveTaxRateExcludingSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Current Effective Tax Rate Excluding Social Contribution On Income", "label": "Current Effective Tax Rate Excluding Social Contribution On Income", "terseLabel": "Current Effective Tax Rate Excluding Social Contribution On Income" } } }, "localname": "CurrentEffectiveTaxRateExcludingSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_CurrentEffectiveTaxRateIncludingSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Current Effective Tax Rate Including Social Contribution On Income", "label": "Current Effective Tax Rate Including Social Contribution On Income", "terseLabel": "Current Effective Tax Rate Including Social Contribution On Income" } } }, "localname": "CurrentEffectiveTaxRateIncludingSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_CurrentEffectiveTaxRateReconciliationSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Current Effective Tax Rate Reconciliation Social Contribution On Income", "label": "Current Effective Tax Rate Reconciliation Social Contribution On Income", "terseLabel": "Current Effective Tax Rate Reconciliation Social Contribution On Income" } } }, "localname": "CurrentEffectiveTaxRateReconciliationSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_DCFMethodforFairValueEstimateMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "DCF Method for Fair Value Estimate [Member]", "label": "DCF Method for Fair Value Estimate [Member]", "terseLabel": "DCF Method for Fair Value Estimate [Member]" } } }, "localname": "DCFMethodforFairValueEstimateMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_Dec18Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Dec-18 [Member]", "label": "Dec-18 [Member]", "terseLabel": "Dec-18 [Member]" } } }, "localname": "Dec18Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Dec19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Dec-19 [Member]", "label": "Dec-19 [Member]", "terseLabel": "Dec-19 [Member]" } } }, "localname": "Dec19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Dec20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Dec-20 [Member] [Member]", "label": "Dec-20 [Member] [Member]", "terseLabel": "Dec-20 [Member] [Member]" } } }, "localname": "Dec20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_DecreaseInFairValueFromFiveHundredPointIncreaseInWeightedAverageCostOfCapitalAssumption": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Decrease in fair value from five hundred point increase in weighted average cost of capital assumption", "label": "Decrease in fair value from five hundred point increase in weighted average cost of capital assumption", "terseLabel": "Decrease in fair value from five hundred point increase in weighted average cost of capital assumption" } } }, "localname": "DecreaseInFairValueFromFiveHundredPointIncreaseInWeightedAverageCostOfCapitalAssumption", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "tg_DeferredTaxBenefitExpenseValuationAllowanceAdjCapitalLossCarryforwards": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Deferred tax expense (benefit) related to a valuation allowance associated with previously recorded capital losses on certain investments", "label": "Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards", "terseLabel": "Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards" } } }, "localname": "DeferredTaxBenefitExpenseValuationAllowanceAdjCapitalLossCarryforwards", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_DefinedBenefitPlanEstimatedDiscretionaryFutureEmployerContributionsCurrentFiscalYear": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Defined benefit plan estimated discretionary future employer contributions in current fiscal year", "label": "Defined Benefit Plan Estimated Discretionary Future Employer Contributions Current Fiscal Year", "terseLabel": "Defined Benefit Plan Estimated Discretionary Future Employer Contributions Current Fiscal Year" } } }, "localname": "DefinedBenefitPlanEstimatedDiscretionaryFutureEmployerContributionsCurrentFiscalYear", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_DefinedBenefitPlanEstimatedRequiredFutureEmployerContributionsInCurrentFiscalYear": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Defined benefit plan estimated required future employer contributions in current fiscal year.", "label": "Defined Benefit Plan Estimated Required Future Employer Contributions In Current Fiscal Year", "verboseLabel": "Expected required contributions" } } }, "localname": "DefinedBenefitPlanEstimatedRequiredFutureEmployerContributionsInCurrentFiscalYear", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_DistributionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Distribution [Member]", "label": "Distribution [Member]", "terseLabel": "Distribution [Member]" } } }, "localname": "DistributionMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_DocumentAndEntityInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Document and Entity Information [Abstract]", "label": "Document And Entity Information [Abstract]", "terseLabel": "Document And Entity Information [Abstract]" } } }, "localname": "DocumentAndEntityInformationAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_EBITDAMultipleCalculationAmountAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EBITDA Multiple Calculation Amount [Axis]", "label": "EBITDA Multiple Calculation Amount [Axis]", "terseLabel": "EBITDA Multiple Calculation Amount [Axis]" } } }, "localname": "EBITDAMultipleCalculationAmountAxis", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "stringItemType" }, "tg_EBITDAMultipleCalculationAmountDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EBITDA Multiple Calculation Amount", "label": "EBITDA Multiple Calculation Amount [Domain]", "terseLabel": "EBITDA Multiple Calculation Amount [Domain]" } } }, "localname": "EBITDAMultipleCalculationAmountDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_EBITDAMultipleMethodforFairValueEstimateMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EBITDA Multiple Method for Fair Value Estimate [Member]", "label": "EBITDA Multiple Method for Fair Value Estimate [Member]", "terseLabel": "EBITDA Multiple Method for Fair Value Estimate [Member]" } } }, "localname": "EBITDAMultipleMethodforFairValueEstimateMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "tg_EBITDAProjectionAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EBITDA Projection", "label": "EBITDA Projection [Axis]", "terseLabel": "EBITDA Projection [Axis]" } } }, "localname": "EBITDAProjectionAxis", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "stringItemType" }, "tg_EBITDAProjectionDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EBITDA Projection", "label": "EBITDA Projection [Domain]", "terseLabel": "EBITDA Projection [Domain]" } } }, "localname": "EBITDAProjectionDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "domainItemType" }, "tg_EVtoAdjustedEBITDAMultipleMethod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EV-to-Adjusted EBITDA Multiple Method", "label": "EV-to-Adjusted EBITDA Multiple Method", "terseLabel": "EV-to-Adjusted EBITDA Multiple Method" } } }, "localname": "EVtoAdjustedEBITDAMultipleMethod", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "stringItemType" }, "tg_EarningsBeforeInterestAndTaxesEBIT": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Earnings before interest and taxes (EBIT)", "label": "Earnings before interest and taxes (EBIT)", "terseLabel": "Earnings before interest and taxes (EBIT)" } } }, "localname": "EarningsBeforeInterestAndTaxesEBIT", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_EarningsBeforeInterestTaxesDepreciationAndAmortizationEBITDA": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Earnings before interest, taxes, depreciation and amortization (EBITDA)", "label": "Earnings before interest, taxes, depreciation and amortization (EBITDA)", "terseLabel": "Earnings before interest, taxes, depreciation and amortization (EBITDA)" } } }, "localname": "EarningsBeforeInterestTaxesDepreciationAndAmortizationEBITDA", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationAmountFDII": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 33.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Amount - FDII", "label": "Effective Income Tax Rate Reconciliation Amount - FDII", "terseLabel": "Effective Income Tax Rate Reconciliation Amount - FDII" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAmountFDII", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationAmountGILTI": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 26.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Amount - GILTI", "label": "Effective Income Tax Rate Reconciliation Amount - GILTI", "terseLabel": "Effective Income Tax Rate Reconciliation Amount - GILTI" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAmountGILTI", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowance": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 10.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the valuation allowance for capital loss carry-forwards.", "label": "Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance", "terseLabel": "Valuation allowance for capital loss carry-forwards", "verboseLabel": "Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance" } } }, "localname": "EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowance", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowanceAmount": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 10.0, "parentTag": "us-gaap_IncomeTaxReconciliationDeductions", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount", "label": "Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount" } } }, "localname": "EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowanceAmount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationDeductionForDivestitureOfSubsidiaryStock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective income tax rate reconciliation deduction for divestiture of subsidiary stock.", "label": "Effective Income Tax Rate Reconciliation Deduction For Divestiture Of Subsidiary Stock", "terseLabel": "Effective Income Tax Rate Reconciliation Deduction For Divestiture Of Subsidiary Stock" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionForDivestitureOfSubsidiaryStock", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationDeductionForForeignInvestmentAdjustments": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Deduction For Foreign Investment Adjustments", "label": "Effective Income Tax Rate Reconciliation Deduction For Foreign Investment Adjustments", "terseLabel": "Effective Income Tax Rate Reconciliation Deduction For Foreign Investment Adjustments", "verboseLabel": "Effective Income Tax Rate Reconciliation Deduction For Foreign Investment Adjustments" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionForForeignInvestmentAdjustments", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateExcludingSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income", "label": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income", "terseLabel": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income" } } }, "localname": "EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateExcludingSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateIncludingSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income", "label": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income", "terseLabel": "Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income" } } }, "localname": "EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateIncludingSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationOperatingLossCarryforwardsValuationAllowanceForForeignCountry": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 17.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the operating loss carry-forward valuation allowances for foreign countries.", "label": "Effective Income Tax Rate Reconciliation Operating Loss Carryforwards Valuation Allowance For Foreign Country", "terseLabel": "Valuation allowance for foreign operating loss carry-forwards", "verboseLabel": "Effective Income Tax Rate Reconciliation Operating Loss Carryforwards Valuation Allowance For Foreign Country" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOperatingLossCarryforwardsValuationAllowanceForForeignCountry", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationPercentFDII": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 15.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Percent - FDII", "label": "Effective Income Tax Rate Reconciliation Percent - FDII", "terseLabel": "Effective Income Tax Rate Reconciliation Percent - FDII" } } }, "localname": "EffectiveIncomeTaxRateReconciliationPercentFDII", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationPercentGILTI": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 6.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Percent - GILTI", "label": "Effective Income Tax Rate Reconciliation Percent - GILTI", "terseLabel": "Effective Income Tax Rate Reconciliation Percent - GILTI" } } }, "localname": "EffectiveIncomeTaxRateReconciliationPercentGILTI", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective income tax rate reconciliation social contribution on income.", "label": "Effective income tax rate reconciliation social contribution on income", "terseLabel": "Effective income tax rate reconciliation social contribution on income" } } }, "localname": "EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 20.0, "parentTag": "us-gaap_IncomeTaxReconciliationDeductions", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income", "label": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income", "terseLabel": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income" } } }, "localname": "EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncomePercentage": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 20.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage", "label": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage", "terseLabel": "Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage" } } }, "localname": "EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncomePercentage", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 9.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate on foreign earnings that are not expected to be permanently reinvested in the foreign country.", "label": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations", "terseLabel": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations", "verboseLabel": "Unremitted earnings from foreign operations" } } }, "localname": "EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 29.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount", "label": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount" } } }, "localname": "EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveIncomeTaxRateReconciliationescrowsettlementamount": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 18.0, "parentTag": "us-gaap_IncomeTaxReconciliationDeductions", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation, escrow settlement, amount", "label": "Effective Income Tax Rate Reconciliation, escrow settlement, amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation, escrow settlement, amount", "terseLabel": "Effective Income Tax Rate Reconciliation, escrow settlement, amount" } } }, "localname": "EffectiveIncomeTaxRateReconciliationescrowsettlementamount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectiveTaxRateReconciliationEscrowSettlement": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 18.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Tax Rate Reconciliation, Escrow Settlement", "label": "Effective Tax Rate Reconciliation, Escrow Settlement", "terseLabel": "Effective Tax Rate Reconciliation, Escrow Settlement" } } }, "localname": "EffectiveTaxRateReconciliationEscrowSettlement", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveTaxRateReconciliationWorthlessStock": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 19.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Tax Rate Reconciliation Worthless Stock", "label": "Effective Tax Rate Reconciliation Worthless Stock", "terseLabel": "Effective Tax Rate Reconciliation Worthless Stock" } } }, "localname": "EffectiveTaxRateReconciliationWorthlessStock", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_EffectiveTaxRateReconciliationWorthlessStockDeductionsAmount": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 19.0, "parentTag": "us-gaap_IncomeTaxReconciliationDeductions", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Effective Tax Rate Reconciliation Worthless Stock, Amount", "label": "Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount", "negatedTerseLabel": "Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount", "terseLabel": "Effective Tax Rate Reconciliation Worthless Stock Deductions, Amount" } } }, "localname": "EffectiveTaxRateReconciliationWorthlessStockDeductionsAmount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_Effectiveincometaxratereconciliationvaluationallowanceduetoforeignlosses": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 35.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "effective income tax rate reconciliation, valuation allowance due to foreign losses", "label": "effective income tax rate reconciliation, valuation allowance due to foreign losses", "terseLabel": "effective income tax rate reconciliation, valuation allowance due to foreign losses" } } }, "localname": "Effectiveincometaxratereconciliationvaluationallowanceduetoforeignlosses", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_EffectofAdoptiononShareBasedCompensation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effect of Adoption on Share-Based Compensation", "label": "Effect of Adoption on Share-Based Compensation", "terseLabel": "Effect of Adoption on Share-Based Compensation" } } }, "localname": "EffectofAdoptiononShareBasedCompensation", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/NewAccountingPronouncementsNewAccountingPronouncementsDetails" ], "xbrltype": "monetaryItemType" }, "tg_ElectricalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Electrical [Member]", "label": "Electrical [Member]", "terseLabel": "Electrical [Member]" } } }, "localname": "ElectricalMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_ElkhartPlantRoofDamageSGA": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Elkhart Plant Roof Damage - SGA", "label": "Elkhart Plant Roof Damage - SGA", "terseLabel": "Elkhart Plant Roof Damage - SGA" } } }, "localname": "ElkhartPlantRoofDamageSGA", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_EstimatedLengthOfRestructuringProject": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Estimated Length Of Restructuring Project", "label": "EstimatedLengthOfRestructuringProject", "terseLabel": "EstimatedLengthOfRestructuringProject" } } }, "localname": "EstimatedLengthOfRestructuringProject", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "durationItemType" }, "tg_ExcessCapitalLossesFromInvestmentsAndOtherRelatedItemsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Excess Capital Losses From Investments And Other Related Items [Member]", "label": "Excess Capital Losses From Investments And Other Related Items [Member]", "terseLabel": "Excess Capital Losses From Investments And Other Related Items [Member]" } } }, "localname": "ExcessCapitalLossesFromInvestmentsAndOtherRelatedItemsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_ExportsFromUnitedStatesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Exports From The United States [Member]", "label": "Exports From United States [Member]", "terseLabel": "Exports From United States [Member]" } } }, "localname": "ExportsFromUnitedStatesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_FairValueSensitivityAnalysisWeightingtoDCFMethodatVariedEVtoAdjustedEBITDAMultiple": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair Value Sensitivity Analysis: Weighting to DCF Method at Varied EV-to-Adjusted EBITDA Multiple", "label": "Fair Value Sensitivity Analysis: Weighting to DCF Method at Varied EV-to-Adjusted EBITDA Multiple", "terseLabel": "Fair Value Sensitivity Analysis: Weighting to DCF Method at Varied EV-to-Adjusted EBITDA Multiple" } } }, "localname": "FairValueSensitivityAnalysisWeightingtoDCFMethodatVariedEVtoAdjustedEBITDAMultiple", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "tg_Feb19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Feb-19 [Member]", "label": "Feb-19 [Member]", "terseLabel": "Feb-19 [Member]" } } }, "localname": "Feb19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Feb20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Feb-20 [Member] [Member]", "label": "Feb-20 [Member] [Member]", "terseLabel": "Feb-20 [Member] [Member]" } } }, "localname": "Feb20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_FilmProductsForeignCurrencyContractForwardContractMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Film Products Foreign Currency Contract Forward Contract [Member]", "label": "Film Products Foreign Currency Contract Forward Contract [Member]", "terseLabel": "Film Products Foreign Currency Contract Forward Contract" } } }, "localname": "FilmProductsForeignCurrencyContractForwardContractMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "tg_FilmProductsManufacturingFacilityInLakeZurichIllinoisMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Film Products Manufacturing Facility In Lake Zurich Illinois [Member]", "label": "FilmProductsManufacturingFacilityInLakeZurichIllinois [Member]", "terseLabel": "FilmProductsManufacturingFacilityInLakeZurichIllinois [Member]" } } }, "localname": "FilmProductsManufacturingFacilityInLakeZurichIllinoisMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "tg_FilmProductsManufacturingFacilityInRedSpringsNorthCarolinaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Film Products Manufacturing Facility in Red Springs North Carolina [Member]", "label": "Film Products Manufacturing Facility In Red Springs North Carolina [Member]", "terseLabel": "Film Products Manufacturing Facility In Red Springs North Carolina" } } }, "localname": "FilmProductsManufacturingFacilityInRedSpringsNorthCarolinaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_FilmProductsManufacturingFacilityInShanghaiChinaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Film Products Manufacturing Facility in Shanghai, China [Member]", "label": "Film Products Manufacturing Facility In Shanghai, China [Member]", "terseLabel": "Film Products Manufacturing Facility In Shanghai, China [Member]" } } }, "localname": "FilmProductsManufacturingFacilityInShanghaiChinaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "tg_FilmProductsSubtotalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Film Products Subtotal [Member]", "label": "Film Products Subtotal [Member]", "terseLabel": "Film Products Subtotal [Member]" } } }, "localname": "FilmProductsSubtotalMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_FilmsForOtherMarketsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Films For Other Markets [Member]", "label": "Films For Other Markets [Member]", "terseLabel": "Films For Other Markets [Member]" } } }, "localname": "FilmsForOtherMarketsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_FilmsProductsManufacturingFacilityGuangzhouChinaDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Films Products Manufacturing Facility Guangzhou China [Domain]", "label": "Films Products Manufacturing Facility Guangzhou China [Domain]", "terseLabel": "Films Products Manufacturing Facility Guangzhou China [Domain]" } } }, "localname": "FilmsProductsManufacturingFacilityGuangzhouChinaDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_FlexiblePackagingFilmsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Flexible Packaging Films [Member]", "label": "Flexible Packaging Films [Member]", "terseLabel": "Flexible Packaging Films [Member]" } } }, "localname": "FlexiblePackagingFilmsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "tg_FlexiblePackagingFilmsMemberDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Flexible Packaging Films [Member] [Domain]", "label": "Flexible Packaging Films [Member] [Domain]", "terseLabel": "Flexible Packaging Films [Member] [Domain]" } } }, "localname": "FlexiblePackagingFilmsMemberDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_ForeignCurrencyForwardContractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Foreign Currency Forward Contracts [Member]", "label": "Foreign Currency Forward Contracts [Member]", "terseLabel": "Foreign Currency Forward Contracts", "verboseLabel": "Foreign Currency Forward Contracts [Member]" } } }, "localname": "ForeignCurrencyForwardContractsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "domainItemType" }, "tg_ForeignCurrencyForwardsAndOptionsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Foreign currency forwards an options member.", "label": "Foreign Currency Forwards And Options [Member]", "terseLabel": "Foreign Currency Forwards And Options [Member]" } } }, "localname": "ForeignCurrencyForwardsAndOptionsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_ForeignCurrencyForwwardsAndOptionsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Foreign Currency Forwwards And Options.", "label": "Foreign Currency Forwwards And Options [Member]", "terseLabel": "Foreign Currency Forwwards And Options [Member]", "verboseLabel": "Foreign Currency Forwards And Options" } } }, "localname": "ForeignCurrencyForwwardsAndOptionsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_ForeignTaxCreditBrazil": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Foreign Tax Credit - Brazil", "label": "Foreign Tax Credit - Brazil", "terseLabel": "Foreign Tax Credit - Brazil" } } }, "localname": "ForeignTaxCreditBrazil", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_FuturaIndustriesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Futura Industries [Member]", "label": "Futura Industries [Member]", "terseLabel": "Futura Industries [Member]" } } }, "localname": "FuturaIndustriesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_FuturaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Futura [Member]", "label": "Futura [Member]", "terseLabel": "Futura [Member]" } } }, "localname": "FuturaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "domainItemType" }, "tg_GainLossonSaleofInvestmentPropertyAfterTax": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Gain (Loss) on Sale of Investment Property, After Tax", "label": "Gain (Loss) on Sale of Investment Property, After Tax", "terseLabel": "Gain (Loss) on Sale of Investment Property, After Tax" } } }, "localname": "GainLossonSaleofInvestmentPropertyAfterTax", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_GeneralCorporateAssets": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails": { "order": 2.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "General corporate assets.", "label": "General Corporate Assets", "terseLabel": "General corporate" } } }, "localname": "GeneralCorporateAssets", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_GoodwillImpairmentDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Goodwill Impairment Disclosure [Abstract]", "label": "Goodwill Impairment Disclosure [Abstract]", "terseLabel": "Goodwill Impairment Disclosure [Abstract]" } } }, "localname": "GoodwillImpairmentDisclosureAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_GrossSales": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Gross Sales", "label": "Gross Sales", "terseLabel": "Gross Sales" } } }, "localname": "GrossSales", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_HarbingerCapitalPartnersSpecialSituationsFundLPMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Harbinger Capital Partners Special Situations Fund, L.P. [Member]", "label": "Harbinger Capital Partners Special Situations Fund L P [Member]", "terseLabel": "Harbinger Capital Partners Special Situations Fund L P [Member]", "verboseLabel": "Harbinger Capital Partners Special Situations Fund L P [Member]" } } }, "localname": "HarbingerCapitalPartnersSpecialSituationsFundLPMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_IdentifiableAssetsBySegmentSubtotal": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Identifiable assets by segment, subtotal.", "label": "Identifiable Assets By Segment, Subtotal", "terseLabel": "Subtotal" } } }, "localname": "IdentifiableAssetsBySegmentSubtotal", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_ImpairmentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Impairment [Abstract]", "label": "Impairment [Abstract]", "terseLabel": "Impairment [Abstract]" } } }, "localname": "ImpairmentAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_IncomeLossFromOngoingOperations": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Operating income for the period associated with the ongoing operations of the segment and excluding gains or losses associated with plant shutdowns, asset impairments and restructurings, gains or losses from the sale of assets and other items and goodwill impairment charges.", "label": "Income Loss From Ongoing Operations", "terseLabel": "Operating profit from ongoing operations" } } }, "localname": "IncomeLossFromOngoingOperations", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_IncomeTaxBeneficiaryAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Tax Beneficiary [Axis]", "label": "Income Tax Beneficiary [Axis]", "terseLabel": "Income Tax Beneficiary [Axis]" } } }, "localname": "IncomeTaxBeneficiaryAxis", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "tg_IncomeTaxBeneficiaryDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Tax Beneficiary [Domain]", "label": "Income Tax Beneficiary [Domain]", "terseLabel": "Income Tax Beneficiary [Domain]" } } }, "localname": "IncomeTaxBeneficiaryDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_IncomeTaxesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Taxes [Line Items]", "label": "Income Taxes [Line Items]", "terseLabel": "Income Taxes [Line Items]" } } }, "localname": "IncomeTaxesLineItems", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "tg_IncomeTaxesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income Taxes [Table]", "label": "Income Taxes [Table]", "terseLabel": "Income Taxes [Table]" } } }, "localname": "IncomeTaxesTable", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "tg_IncreaseDecreaseInNetDeferredTaxes": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase decrease in net deferred taxes.", "label": "Increase Decrease In Net Deferred Taxes", "terseLabel": "Deferred income taxes" } } }, "localname": "IncreaseDecreaseInNetDeferredTaxes", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "tg_IncreaseInFairValueFromFiveHundredPointDecreaseInWeightedAverageCostOfCapitalAssumption": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase in fair value from five hundred point decrease in weighted average cost of capital assumption", "label": "Increase In Fair Value From Five Hundred Point Decrease In Weighted Average Cost Of Capital Assumption", "terseLabel": "Increase in fair value from five hundred point decrease in weighted average cost of capital assumption" } } }, "localname": "IncreaseInFairValueFromFiveHundredPointDecreaseInWeightedAverageCostOfCapitalAssumption", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "tg_IncreaseInValueOfkaloInvestmentHeldAbroadPercentage": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 12.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Increase In Value Of kal\u00e9o Investment Held Abroad, Percentage", "label": "Increase In Value Of kal\u00e9o Investment Held Abroad, Percentage", "terseLabel": "Increase In Value Of kal\u00e9o Investment Held Abroad, Percentage" } } }, "localname": "IncreaseInValueOfkaloInvestmentHeldAbroadPercentage", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "tg_Increaseinvalueofkaloinvestmentheldabroad": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 31.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase in value of kal\u00e9o investment held abroad", "label": "Increase in value of kal\u00e9o investment held abroad", "negatedTerseLabel": "Increase in value of kal\u00e9o investment held abroad", "terseLabel": "Increase in value of kal\u00e9o investment held abroad" } } }, "localname": "Increaseinvalueofkaloinvestmentheldabroad", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "tg_IntegrationExpensesAndOtherNonRecurringCharges": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Costs incurred to related to a business combination which have been expensed during the period. Such costs include business integration costs and other non-recurring expenses directly related to the acquired entity that are not considered to be part of ongoing operations.", "label": "Integration expenses and other non recurring charges", "terseLabel": "Integration-related expenses and other non-recurring transactions" } } }, "localname": "IntegrationExpensesAndOtherNonRecurringCharges", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_Investmentinkaleo": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Investment in kaleo", "label": "Investment in kaleo", "terseLabel": "Investment in kaleo" } } }, "localname": "Investmentinkaleo", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "tg_InvestmentsatFairValueAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Investments at Fair Value [Abstract]", "label": "Investments at Fair Value [Abstract]", "terseLabel": "Investments at Fair Value [Abstract]" } } }, "localname": "InvestmentsatFairValueAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_Jan19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jan-19 [Member]", "label": "Jan-19 [Member]", "terseLabel": "Jan-19 [Member]" } } }, "localname": "Jan19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Jan20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jan-20 [Member] [Member]", "label": "Jan-20 [Member] [Member]", "terseLabel": "Jan-20 [Member] [Member]" } } }, "localname": "Jan20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Jul19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jul-19 [Member]", "label": "Jul-19 [Member]", "terseLabel": "Jul-19 [Member]" } } }, "localname": "Jul19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Jul20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jul-20 [Member] [Member]", "label": "Jul-20 [Member] [Member]", "terseLabel": "Jul-20 [Member] [Member]" } } }, "localname": "Jul20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Jun19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jun-19 [Member]", "label": "Jun-19 [Member]", "terseLabel": "Jun-19 [Member]" } } }, "localname": "Jun19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Jun20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Jun-20 [Member] [Member]", "label": "Jun-20 [Member] [Member]", "terseLabel": "Jun-20 [Member] [Member]" } } }, "localname": "Jun20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Kaleo2016Q1gainoncontractterminationexcludedfromotherexpenses": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Kaleo 2016 Q1 gain on contract termination excluded from other expenses", "label": "Kaleo 2016 Q1 gain on contract termination excluded from other expenses", "terseLabel": "Kaleo 2016 Q1 gain on contract termination excluded from other expenses" } } }, "localname": "Kaleo2016Q1gainoncontractterminationexcludedfromotherexpenses", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "tg_KaleoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "kaleo [Member]", "label": "kaleo [Member]", "terseLabel": "kaleo [Member]", "verboseLabel": "kaleo" } } }, "localname": "KaleoMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "tg_LengthBrazilianTaxIncentive": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Length of Brazilian Tax Incentive", "label": "LengthBrazilianTaxIncentive", "terseLabel": "LengthBrazilianTaxIncentive" } } }, "localname": "LengthBrazilianTaxIncentive", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "durationItemType" }, "tg_LongLivedAssetImpairmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Long-Lived Asset Impairment [Member]", "label": "Long Lived Asset Impairment [Member]", "terseLabel": "Long Lived Asset Impairment [Member]" } } }, "localname": "LongLivedAssetImpairmentMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "tg_LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Losses associated with plant shutdowns asset impairments and restructurings unusual items gains from sale for assets and other.", "label": "Losses Associated With Plant Shutdowns Asset Impairments And Restructurings Unusual Items Gains From Sale For Assets And Other", "verboseLabel": "Plant Shutdowns, Asset Impairments, Restructurings And Other" } } }, "localname": "LossesAssociatedWithPlantShutdownsAssetImpairmentsAndRestructuringsUnusualItemsGainsFromSaleForAssetsAndOther", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOther" ], "xbrltype": "textBlockItemType" }, "tg_LossesAssociatedWithPlantShutdownsAssetImpairmentsRestructuringsUnusualItemsGainsLossesFromSaleOfAssetsOtherItems": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Losses associated with plant shutdowns asset impairments restructurings unusual items gains losses from sale of assets other items.", "label": "Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items", "terseLabel": "Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items" } } }, "localname": "LossesAssociatedWithPlantShutdownsAssetImpairmentsRestructuringsUnusualItemsGainsLossesFromSaleOfAssetsOtherItems", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "tg_LossofFutureSalesProjection": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Loss of Future Sales Projection", "label": "Loss of Future Sales Projection", "terseLabel": "Loss of Future Sales Projection" } } }, "localname": "LossofFutureSalesProjection", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_MachineryandEquipmentBNLDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Machinery and Equipment BNL [Domain]", "label": "Machinery and Equipment BNL [Domain]", "terseLabel": "Machinery and Equipment BNL [Domain]" } } }, "localname": "MachineryandEquipmentBNLDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_Mar19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Mar-19 [Member]", "label": "Mar-19 [Member]", "terseLabel": "Mar-19 [Member]" } } }, "localname": "Mar19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Mar20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Mar-20 [Member] [Member]", "label": "Mar-20 [Member] [Member]", "terseLabel": "Mar-20 [Member] [Member]" } } }, "localname": "Mar20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_May19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "May-19 [Member]", "label": "May-19 [Member]", "terseLabel": "May-19 [Member]" } } }, "localname": "May19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_May20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "May-20 [Member] [Member]", "label": "May-20 [Member] [Member]", "terseLabel": "May-20 [Member] [Member]" } } }, "localname": "May20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_NetSales": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregrate revenue during the period from the sales of goods in the normal course of business, after deducting returns, allowances, discounts, and charges for outbound freight.", "label": "Net Sales", "terseLabel": "Sales", "totalLabel": "Total net sales" } } }, "localname": "NetSales", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "monetaryItemType" }, "tg_NewAccountingPronouncementsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "New Accounting Pronouncements [Abstract]", "label": "New Accounting Pronouncements [Abstract]", "terseLabel": "New Accounting Pronouncements [Abstract]" } } }, "localname": "NewAccountingPronouncementsAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_NonresidentialBuildingAndConstructionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nonresidential Building And Construction [Member]", "label": "Nonresidential Building And Construction [Member]", "terseLabel": "Nonresidential Building And Construction [Member]" } } }, "localname": "NonresidentialBuildingAndConstructionMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_Nov18Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nov-18 [Member]", "label": "Nov-18 [Member]", "terseLabel": "Nov-18 [Member]" } } }, "localname": "Nov18Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Nov19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nov-19 [Member]", "label": "Nov-19 [Member]", "terseLabel": "Nov-19 [Member]" } } }, "localname": "Nov19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Nov20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nov-20 [Member] [Member]", "label": "Nov-20 [Member] [Member]", "terseLabel": "Nov-20 [Member] [Member]" } } }, "localname": "Nov20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Oct19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Oct-19 [Member]", "label": "Oct-19 [Member]", "terseLabel": "Oct-19 [Member]" } } }, "localname": "Oct19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Oct2018Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Oct-2018 [Member]", "label": "Oct-2018 [Member]", "terseLabel": "Oct-2018 [Member]" } } }, "localname": "Oct2018Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Oct20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Oct-20 [Member] [Member]", "label": "Oct-20 [Member] [Member]", "terseLabel": "Oct-20 [Member] [Member]" } } }, "localname": "Oct20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_OperationsOutsideUnitedStatesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operations Outside The United States [Member]", "label": "Operations Outside United States [Member]", "terseLabel": "Operations Outside United States [Member]" } } }, "localname": "OperationsOutsideUnitedStatesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_OriginalBudgetMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Original Budget", "label": "Original Budget [Member]", "terseLabel": "Original Budget [Member]" } } }, "localname": "OriginalBudgetMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "domainItemType" }, "tg_OtherAccruedExpensesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Accrued Expenses [Member]", "label": "Other Accrued Expenses [Member]", "terseLabel": "Other" } } }, "localname": "OtherAccruedExpensesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "tg_OtherNonOperatingandNonRecurringChargesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Non-Operating and Non-Recurring Charges [Abstract]", "label": "Other Non-Operating and Non-Recurring Charges [Abstract]", "terseLabel": "Other Non-Operating and Non-Recurring Charges [Abstract]" } } }, "localname": "OtherNonOperatingandNonRecurringChargesAbstract", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "tg_OtherNonoperatingIncomeExpenseNetOther": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other Nonoperating Income (Expense), Net - Other", "label": "Other Nonoperating Income (Expense), Net - Other", "terseLabel": "Other Nonoperating Income (Expense), Net - Other" } } }, "localname": "OtherNonoperatingIncomeExpenseNetOther", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails" ], "xbrltype": "monetaryItemType" }, "tg_OtherNonoperatingIncomeExpenseNetTotal": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Nonoperating Income (Expense), Net - Total", "label": "Other Nonoperating Income (Expense), Net - Total", "terseLabel": "Other Nonoperating Income (Expense), Net - Total" } } }, "localname": "OtherNonoperatingIncomeExpenseNetTotal", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails" ], "xbrltype": "monetaryItemType" }, "tg_OtherPlantConsolidationExpensesCostofGoodsSold": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other costs associated with plant consolidation project included in \"Cost of goods sold\"", "label": "Other Plant Consolidation Expenses - Cost of Goods Sold", "terseLabel": "Other Plant Consolidation Expenses - Cost of Goods Sold" } } }, "localname": "OtherPlantConsolidationExpensesCostofGoodsSold", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_OtherRestructuringCostsafterTaxes": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Restructuring Costs after Taxes", "label": "Other Restructuring Costs after Taxes", "terseLabel": "Other Restructuring Costs after Taxes" } } }, "localname": "OtherRestructuringCostsafterTaxes", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_PEFilmsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "PE Films Member.", "label": "PE Films [Member]", "terseLabel": "PE Films", "verboseLabel": "PE Films" } } }, "localname": "PEFilmsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_PEFilmsPersonalCareEuropeanOperationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "PE Films Personal Care European Operations [Member]", "label": "PE Films Personal Care European Operations [Member]", "terseLabel": "PE Films Personal Care European Operations [Member]" } } }, "localname": "PEFilmsPersonalCareEuropeanOperationsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "tg_PEFilmsProductsManufacturingFacilityRestagHungaryDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "PE Films Products Manufacturing Facility Restag Hungary [Domain]", "label": "PE Films Products Manufacturing Facility Restag Hungary [Domain]", "terseLabel": "PE Films Products Manufacturing Facility Restag Hungary [Domain]" } } }, "localname": "PEFilmsProductsManufacturingFacilityRestagHungaryDomain", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_PercentageDecreaseInFairValueInvestment": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage Decrease in Fair Value Investment", "label": "Percentage Decrease in Fair Value Investment", "terseLabel": "Percentage Decrease in Fair Value Investment" } } }, "localname": "PercentageDecreaseInFairValueInvestment", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "tg_PercentageofCoverageUsingCashFlowHedges": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of Coverage Using Cash Flow Hedges", "label": "Percentage of Coverage Using Cash Flow Hedges", "terseLabel": "Percentage of Coverage Using Cash Flow Hedges" } } }, "localname": "PercentageofCoverageUsingCashFlowHedges", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "percentItemType" }, "tg_PersonalCareMaterialsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Personal Care Materials [Member]", "label": "Personal Care Materials [Member]", "terseLabel": "Personal Care Materials [Member]" } } }, "localname": "PersonalCareMaterialsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_PlantShutdownRelatedExpendituresGross": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Plant Shutdown Related Expenditures Gross", "label": "Plant Shutdown Related Expenditures Gross", "terseLabel": "Plant Shutdown Related Expenditures Gross" } } }, "localname": "PlantShutdownRelatedExpendituresGross", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_PlantShutdownRelatedExpendituresNet": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Net incremental expenses that are not considered part of ongoing operations associated with plant shutdown.", "label": "Plant Shutdown Related Expenditures Net", "terseLabel": "Plant shutdown related expenditures" } } }, "localname": "PlantShutdownRelatedExpendituresNet", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_PlantShutdownsAssetImpairmentsRestructuringAndOther": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Gains or losses associated with plant shutdowns, asset impairments and restructurings, gains or losses from the sale of assets, goodwill impairment losses and other non-recurring items which are not associated with the ongoing operations of a segment.", "label": "Plant Shutdowns, Asset Impairments, Restructuring And Other", "terseLabel": "EBITDA" } } }, "localname": "PlantShutdownsAssetImpairmentsRestructuringAndOther", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_PlantShutdownsAssetImpairmentsRestructuringsAndOtherAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Plant Shutdowns, Asset Impairments, Restructurings And Other [Abstract]", "label": "Plant Shutdowns, Asset Impairments, Restructurings And Other [Abstract]", "terseLabel": "Plant Shutdowns, Asset Impairments, Restructurings And Other [Abstract]" } } }, "localname": "PlantShutdownsAssetImpairmentsRestructuringsAndOtherAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_PlantShutdownsAssetsImpairmentsRestructuringsAndOtherLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Plant Shutdowns, Assets Impairments, Restructurings And Other [Line Items]", "label": "Plant Shutdowns, Assets Impairments, Restructurings And Other [Line Items]", "terseLabel": "Restructuring Cost and Reserve [Line Items]" } } }, "localname": "PlantShutdownsAssetsImpairmentsRestructuringsAndOtherLineItems", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "tg_PointDecreaseOfWeightedAverageCostOfCapitalAssumption": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Point Decrease Of Weighted Average Cost Of Capital Assumption", "label": "Point Decrease Of Weighted Average Cost Of Capital Assumption", "terseLabel": "Basis point decrease of weighted average cost of capital assumption" } } }, "localname": "PointDecreaseOfWeightedAverageCostOfCapitalAssumption", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "tg_PointIncreaseOfWeightedAverageCostOfCapitalAssumption": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Point Increase Of Weighted Average Cost Of Capital Assumption", "label": "Point Increase Of Weighted Average Cost Of Capital Assumption", "terseLabel": "Basis point increase of weighted average cost of capital assumption" } } }, "localname": "PointIncreaseOfWeightedAverageCostOfCapitalAssumption", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "tg_PrepaidExpensesAndOtherMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Prepaid Expenses And Other.", "label": "Prepaid Expenses And Other [Member]", "terseLabel": "Prepaid Expenses And Other" } } }, "localname": "PrepaidExpensesAndOtherMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_ProceedsFromStockOptionsExercisedAndOther": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The net cash inflow associated with the amount received from holders exercising their stock options and other miscellaneous stock related activities.", "label": "Proceeds From Stock Options Exercised And Other", "terseLabel": "Proceeds from exercise of stock options and other" } } }, "localname": "ProceedsFromStockOptionsExercisedAndOther", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "tg_ProductionLIneStartupandRampupCosts": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Production LIne Start-up and Ramp-up Costs", "label": "Production LIne Start-up and Ramp-up Costs", "terseLabel": "Production LIne Start-up and Ramp-up Costs" } } }, "localname": "ProductionLIneStartupandRampupCosts", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_ProjectedProceedsfromFutureSaleofAssets": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Projected Proceeds from Future Sale of Assets", "label": "Projected Proceeds from Future Sale of Assets", "terseLabel": "Losses Associated With Plant Shutdowns Asset Impairments Restructurings Unusual Items Gains Losses From Sale Of Assets Other Items" } } }, "localname": "ProjectedProceedsfromFutureSaleofAssets", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_ResidentialBuildingAndConstructionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Residential Building And Construction [Member]", "label": "Residential Building And Construction [Member]", "terseLabel": "Residential Building And Construction [Member]" } } }, "localname": "ResidentialBuildingAndConstructionMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_RestructuringCapExEquiptUpgradesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Restructuring - Cap Ex for Equipment Upgrades [Member]", "label": "RestructuringCapExEquiptUpgrades [Member]", "terseLabel": "RestructuringCapExEquiptUpgrades [Member]" } } }, "localname": "RestructuringCapExEquiptUpgradesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_RestructuringExpectedCashOutflows": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Restructuring - Expected Cash Outflows", "label": "RestructuringExpectedCashOutflows", "terseLabel": "RestructuringExpectedCashOutflows" } } }, "localname": "RestructuringExpectedCashOutflows", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_RestructuringProductQualificationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Restructuring - Product Qualifications [Member]", "label": "RestructuringProductQualifications [Member]", "terseLabel": "RestructuringProductQualifications [Member]" } } }, "localname": "RestructuringProductQualificationsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_RestructuringReserveChargedAgainstAssets": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Restructuring reserve charged against assets", "label": "Restructuring Reserve Charged Against Assets", "terseLabel": "" } } }, "localname": "RestructuringReserveChargedAgainstAssets", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "tg_RestructuringSafetyQualityIncentivesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Restructuring - Safety & Quality Incentives [Member]", "label": "RestructuringSafetyQualityIncentives [Member]", "terseLabel": "RestructuringSafetyQualityIncentives [Member]" } } }, "localname": "RestructuringSafetyQualityIncentivesMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_RestructuringSeveranceEquipmentTransfersMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Restructuring - Severance & Equipment Transfers [Member]", "label": "RestructuringSeverance&EquipmentTransfers [Member]", "terseLabel": "RestructuringSeverance&EquipmentTransfers [Member]" } } }, "localname": "RestructuringSeveranceEquipmentTransfersMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_RestructuringandDisposalActivitiesAnticipatedCashCostSavings": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Restructuring and Disposal Activities - Anticipated Cash Cost Savings", "label": "Restructuring and Disposal Activities - Anticipated Cash Cost Savings", "terseLabel": "Restructuring and Disposal Activities - Anticipated Cash Cost Savings" } } }, "localname": "RestructuringandDisposalActivitiesAnticipatedCashCostSavings", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_RevenuefromContractwithCustomerbyGeographicLocationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revenue from Contract with Customer by Geographic Location [Abstract]", "label": "Revenue from Contract with Customer by Geographic Location [Abstract]", "terseLabel": "Revenue from Contract with Customer by Geographic Location [Abstract]" } } }, "localname": "RevenuefromContractwithCustomerbyGeographicLocationAbstract", "nsuri": "http://www.tredegar.com/20200331", "xbrltype": "stringItemType" }, "tg_RevisedCOVID19BudgetMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revised COVID-19 Budget", "label": "Revised COVID-19 Budget [Member]", "terseLabel": "Revised COVID-19 Budget [Member]" } } }, "localname": "RevisedCOVID19BudgetMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "domainItemType" }, "tg_ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block]", "label": "Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block]", "terseLabel": "Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs" } } }, "localname": "ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "textBlockItemType" }, "tg_ScheduleOfIdentifiableAssetsBySegment": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of identifiable assets by segment.", "label": "Schedule Of Identifiable Assets By Segment", "terseLabel": "Schedule Of Identifiable Assets By Segment" } } }, "localname": "ScheduleOfIdentifiableAssetsBySegment", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingTables" ], "xbrltype": "textBlockItemType" }, "tg_ScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income [Table Text Block]", "label": "Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income [Table Text Block]", "terseLabel": "Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income" } } }, "localname": "ScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeTableTextBlock", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "textBlockItemType" }, "tg_ScheduleofTradeNameAcceleratedAmortizationLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Schedule of Trade Name Accelerated Amortization [Table]", "label": "Schedule of Trade Name Accelerated Amortization [Line Items]", "terseLabel": "Schedule of Trade Name Accelerated Amortization [Line Items]" } } }, "localname": "ScheduleofTradeNameAcceleratedAmortizationLineItems", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "stringItemType" }, "tg_ScheduleofTradeNameAcceleratedAmortizationTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Trade Name Accelerated Amortization [Table]", "label": "Schedule of Trade Name Accelerated Amortization [Table]", "terseLabel": "Schedule of Trade Name Accelerated Amortization [Table]" } } }, "localname": "ScheduleofTradeNameAcceleratedAmortizationTable", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "stringItemType" }, "tg_ScheduleofTradeNameAcceleratedAmortizationTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for Schedule of Trade Name Accelerated Amortization [Table]", "label": "Schedule of Trade Name Accelerated Amortization [Table Text Block]", "terseLabel": "Schedule of Trade Name Accelerated Amortization [Table Text Block]" } } }, "localname": "ScheduleofTradeNameAcceleratedAmortizationTableTextBlock", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationRestrictCashReconciliationTableTables" ], "xbrltype": "textBlockItemType" }, "tg_Sep19Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sep-19 [Member]", "label": "Sep-19 [Member]", "terseLabel": "Sep-19 [Member]" } } }, "localname": "Sep19Member", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_Sep20MemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sep-20 [Member] [Member]", "label": "Sep-20 [Member] [Member]", "terseLabel": "Sep-20 [Member] [Member]" } } }, "localname": "Sep20MemberMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "tg_SeveranceCostsCostofGoodsSold": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Severance Costs - Cost of Goods Sold", "label": "Severance Costs - Cost of Goods Sold", "terseLabel": "Severance Costs - Cost of Goods Sold" } } }, "localname": "SeveranceCostsCostofGoodsSold", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "tg_ShareBasedCompensationExpenseValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, stock options, restricted stock or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.", "label": "Share Based Compensation Expense, Value", "terseLabel": "Stock-based compensation expense" } } }, "localname": "ShareBasedCompensationExpenseValue", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "tg_SharesUsedToComputeEarningsLossPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Shares Used To Compute Earnings Loss Per Share.", "label": "Shares Used To Compute Earnings Loss Per Share [Abstract]", "terseLabel": "Shares used to compute earnings (loss) per share:" } } }, "localname": "SharesUsedToComputeEarningsLossPerShareAbstract", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "tg_StockIssuedDuringPeriodForStockOptionsExercisedAndOtherMiscellaneousStockTransactions": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Value of stock issued during the period as a result of the exercise of stock options and other miscellaneous stock transactions, including but not limited to shares forfeited to pay payroll taxes and excess tax benefits from issuance of stock from share-based compensation plans.", "label": "Stock Issued During Period for Stock Options Exercised and Other Miscellaneous Stock Transactions", "terseLabel": "Issued upon exercise of stock options (including related income tax benefits)\u00a0& other" } } }, "localname": "StockIssuedDuringPeriodForStockOptionsExercisedAndOtherMiscellaneousStockTransactions", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "tg_SurfaceProtectionFilmsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Surface Protection Films [Member]", "label": "Surface Protection Films [Member]", "terseLabel": "Surface Protection Films [Member]" } } }, "localname": "SurfaceProtectionFilmsMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "tg_TerphaneLtdaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Terphane Ltda [Member]", "label": "Terphane Ltda [Member]", "terseLabel": "Terphane Ltda [Member]" } } }, "localname": "TerphaneLtdaMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_TotalIncomeLossAssociatedWithSegments": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total income and loss before income expenses associated with a specific segment. Includes income/loss from ongoing operations; plant shutdowns, asset impairments, restructurings and other non-recurring charges; and goodwill impairment charges.", "label": "Total Income Loss Associated With Segments", "terseLabel": "Total Segment Income (Loss)" } } }, "localname": "TotalIncomeLossAssociatedWithSegments", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "tg_TotalRevenuesNetOfOtherExpenses": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total sales, net of returns, allowances and discounts, plus other non-operating income and expenses.", "label": "Total Revenues Net Of Other Expenses", "terseLabel": "Total revenues, net of other expenses" } } }, "localname": "TotalRevenuesNetOfOtherExpenses", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "tg_TotalWithdrawalProceedsReceived": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total withdrawal proceeds received.", "label": "Total Withdrawal Proceeds Received", "terseLabel": "Total withdrawal proceeds received" } } }, "localname": "TotalWithdrawalProceedsReceived", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "tg_TradeNameAcceleratedAmortization": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Trade Name Accelerated Amortization", "label": "Trade Name Accelerated Amortization", "terseLabel": "Trade Name Accelerated Amortization" } } }, "localname": "TradeNameAcceleratedAmortization", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "monetaryItemType" }, "tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Tredegar Common Stock Purchased By Trust For Savings Restoration Plan", "label": "Tredegar Common Stock Purchased by Trust for Savings Restoration Plan", "negatedLabel": "Tredegar common stock purchased by trust for savings restoration plan" } } }, "localname": "TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "tg_Tredegarvs.3MMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tredegar vs. 3M [Member]", "label": "Tredegar vs. 3M [Member]", "terseLabel": "3M vs. Tredegar" } } }, "localname": "Tredegarvs.3MMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "tg_TrustForSavingRestorationPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Trust For Saving Restoration Plan.", "label": "Trust For Saving Restoration Plan [Member]", "terseLabel": "Trust for Savings Restoration Plan" } } }, "localname": "TrustForSavingRestorationPlanMember", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "tg_UnrealizedGainLossOnInvestmentPropertyAfterTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Unrealized Gain Loss On Investment Property After Tax", "label": "Unrealized Gain Loss On Investment Property After Tax", "terseLabel": "Unrealized Gain Loss On Investment Property After Tax" } } }, "localname": "UnrealizedGainLossOnInvestmentPropertyAfterTax", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_UnrealizedGainLossOnInvestmentUnderFairValueMethodAfterTaxes": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Unrealized gain loss on investment under fair value method after taxes.", "label": "Unrealized Gain Loss On Investment Under Fair Value Method After Taxes", "negatedTerseLabel": "Unrealized Gain Loss On Investment Under Fair Value Method After Taxes", "verboseLabel": "Unrealized gain (loss) on investment under fair value method, after taxes" } } }, "localname": "UnrealizedGainLossOnInvestmentUnderFairValueMethodAfterTaxes", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_UnrealizedGainLossOnInvestmentsNetOfTax": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Unrealized Gain Loss On Investments Net Of Tax.", "label": "Unrealized Gain Loss On Investments Net Of Tax", "terseLabel": "Unrealized Gain Loss On Investments Net Of Tax" } } }, "localname": "UnrealizedGainLossOnInvestmentsNetOfTax", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_UnrealizedGainLossonInvestmentProperty": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Unrealized Gain (Loss) on Investment Property", "label": "Unrealized Gain (Loss) on Investment Property", "terseLabel": "Unrealized Gain (Loss) on Investment Property" } } }, "localname": "UnrealizedGainLossonInvestmentProperty", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "tg_UnrealizedGainLossonInvestmentskaleo": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails": { "order": 1.0, "parentTag": "us-gaap_OtherNonoperatingIncomeExpense", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Unrealized Gain (Loss) on Investments - kaleo", "label": "Unrealized Gain (Loss) on Investments - kaleo", "terseLabel": "Unrealized Gain (Loss) on Investments - kaleo" } } }, "localname": "UnrealizedGainLossonInvestmentskaleo", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails" ], "xbrltype": "monetaryItemType" }, "tg_WeightingofEBITDAMultipleMethodversusDCFMethod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weighting of EBITDA Multiple Method versus DCF Method", "label": "Weighting of EBITDA Multiple Method versus DCF Method", "terseLabel": "Weighting of EBITDA Multiple Method versus DCF Method" } } }, "localname": "WeightingofEBITDAMultipleMethodversusDCFMethod", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "tg_WorthlessStockTaxDeductibleAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Worthless Stock Tax Deductible Amount", "label": "Worthless Stock Tax Deductible Amount", "terseLabel": "Worthless Stock Tax Deductible Amount" } } }, "localname": "WorthlessStockTaxDeductibleAmount", "nsuri": "http://www.tredegar.com/20200331", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsNotesAndLoansReceivableLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Accounts, Notes, Loans and Financing Receivable [Line Items]", "terseLabel": "Accounts, Notes, Loans and Financing Receivable [Line Items]" } } }, "localname": "AccountsNotesAndLoansReceivableLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccountsPayableCurrent": { "auth_ref": [ "r38" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accounts Payable, Current", "terseLabel": "Accounts payable" } } }, "localname": "AccountsPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableChangeInMethodCreditLossExpenseReversal": { "auth_ref": [ "r151" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) for expected credit loss on accounts receivable from change in methodology.", "label": "Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)", "terseLabel": "Accounts Receivable, Change in Method, Credit Loss Expense (Reversal)" } } }, "localname": "AccountsReceivableChangeInMethodCreditLossExpenseReversal", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableGrossCurrent": { "auth_ref": [ "r146", "r147" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.", "label": "Accounts Receivable, before Allowance for Credit Loss, Current", "terseLabel": "Accounts Receivable, before Allowance for Credit Loss, Current" } } }, "localname": "AccountsReceivableGrossCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableNet": { "auth_ref": [ "r20", "r335" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.", "label": "Accounts Receivable, after Allowance for Credit Loss", "terseLabel": "Accounts Receivable, after Allowance for Credit Loss" } } }, "localname": "AccountsReceivableNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedLiabilitiesCurrent": { "auth_ref": [ "r41" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrued Liabilities, Current", "terseLabel": "Accrued expenses" } } }, "localname": "AccruedLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": { "auth_ref": [ "r59", "r64", "r67", "r228", "r266" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.", "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]", "terseLabel": "Pension & Other Post-retirement Benefit Adjustment" } } }, "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r36", "r174" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.", "label": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment", "negatedTerseLabel": "Less accumulated depreciation" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember": { "auth_ref": [ "r58", "r64", "r67", "r265" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive income (loss) resulting from gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, attributable to the parent.", "label": "Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]", "terseLabel": "Gain (Loss) on Derivative Financial Instruments" } } }, "localname": "AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax": { "auth_ref": [ "r58", "r61", "r63" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.", "label": "Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax", "verboseLabel": "Gain (loss) on derivative financial instruments" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax": { "auth_ref": [ "r60", "r64" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax", "negatedLabel": "Pension and other post-retirement benefit adjustments" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax": { "auth_ref": [ "r56", "r61", "r63", "r64", "r297", "r300", "r302" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.", "label": "Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax", "terseLabel": "Foreign currency translation adjustment" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Accumulated Other Comprehensive Income (Loss) [Line Items]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Line Items]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r61", "r63", "r64" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.", "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax", "periodEndLabel": "End of Period", "periodStartLabel": "Beginning of Period", "terseLabel": "Accumulated Other Comprehensive Income (Loss), Net of Tax" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).", "label": "Accumulated Other Comprehensive Income (Loss) [Table]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Table]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedTranslationAdjustmentMember": { "auth_ref": [ "r57", "r64", "r67", "r266" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the parent.", "label": "Accumulated Foreign Currency Adjustment Attributable to Parent [Member]", "terseLabel": "Foreign Currency Translation" } } }, "localname": "AccumulatedTranslationAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Adjustments for noncash items:" } } }, "localname": "AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.", "label": "Share-based Payment Arrangement, Decrease for Tax Withholding Obligation", "terseLabel": "Repurchase of employee common stock for tax withholdings" } } }, "localname": "AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables": { "auth_ref": [ "r148" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The valuation allowance as of the balance sheet date to reduce the gross amount of receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet.", "label": "Allowance for Doubtful Accounts, Premiums and Other Receivables", "terseLabel": "Allowance for Doubtful Accounts, Premiums and Other Receivables" } } }, "localname": "AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent": { "auth_ref": [ "r25", "r148", "r150" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of allowance for credit loss on accounts receivable, classified as current.", "label": "Accounts Receivable, Allowance for Credit Loss, Current", "terseLabel": "Accounts and other receivables, allowance for doubtful accounts and sales returns" } } }, "localname": "AllowanceForDoubtfulAccountsReceivableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfIntangibleAssets": { "auth_ref": [ "r104", "r166", "r169" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Amortization of Intangible Assets", "terseLabel": "Amortization of identifiable intangibles" } } }, "localname": "AmortizationOfIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfLeasedAsset": { "auth_ref": [ "r104", "r310" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The expense charged against earnings for the periodic recognition of capitalized leases. This element may apply to energy companies that lease mineral producing properties and to other enterprises that capitalize property, plant, or equipment obtained through capital leases.", "label": "Amortization of Leased Asset", "terseLabel": "Amortization of Leased Asset" } } }, "localname": "AmortizationOfLeasedAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r129" ], "lang": { "en-US": { "role": { "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.", "label": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount", "terseLabel": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/EarningsPerShareNarrativeDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_AssetImpairmentCharges": { "auth_ref": [ "r104", "r171" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.", "label": "Asset Impairment Charges", "terseLabel": "(Gain) loss on asset impairments and divestitures" } } }, "localname": "AssetImpairmentCharges", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Assets": { "auth_ref": [ "r139", "r325", "r336" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets", "totalLabel": "Total assets" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets [Abstract]", "terseLabel": "Assets" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsCurrent": { "auth_ref": [ "r9", "r10", "r53" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets, Current", "totalLabel": "Total current assets" } } }, "localname": "AssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets, Current [Abstract]", "terseLabel": "Current assets:" } } }, "localname": "AssetsCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetLocationAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by location on balance sheet (statement of financial position).", "label": "Balance Sheet Location [Axis]", "terseLabel": "Balance Sheet Location [Axis]" } } }, "localname": "BalanceSheetLocationAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetLocationDomain": { "auth_ref": [ "r276", "r281" ], "lang": { "en-US": { "role": { "documentation": "Location in the balance sheet (statement of financial position).", "label": "Balance Sheet Location [Domain]", "terseLabel": "Balance Sheet Location [Domain]" } } }, "localname": "BalanceSheetLocationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BasisOfAccounting": { "auth_ref": [ "r118" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for the basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).", "label": "Basis of Accounting [Text Block]", "terseLabel": "Basis Of Presentation" } } }, "localname": "BasisOfAccounting", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentation" ], "xbrltype": "textBlockItemType" }, "us-gaap_BusinessAcquisitionAcquireeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.", "label": "Business Acquisition, Acquiree [Domain]", "terseLabel": "Business Acquisition, Acquiree [Domain]" } } }, "localname": "BusinessAcquisitionAcquireeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionAxis": { "auth_ref": [ "r261", "r262" ], "lang": { "en-US": { "role": { "documentation": "Information by business combination or series of individually immaterial business combinations.", "label": "Business Acquisition [Axis]", "terseLabel": "Business Acquisition [Axis]" } } }, "localname": "BusinessAcquisitionAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r7", "r34", "r106" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.", "label": "Cash and Cash Equivalents, at Carrying Value", "verboseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": { "auth_ref": [ "r100", "r106", "r110" ], "calculation": { "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails": { "order": 1.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents", "periodEndLabel": "Cash, cash equivalents, and restricted cash at end of period", "periodStartLabel": "Cash, cash equivalents, and restricted cash at beginning of period", "terseLabel": "Cash, cash equivalents, and restricted cash at beginning of period" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": { "auth_ref": [ "r100", "r299" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect", "totalLabel": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths": { "auth_ref": [ "r294" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.", "label": "Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months", "terseLabel": "Amounts of unrealized after tax gains (losses) to be Reclassified within Twelve Months" } } }, "localname": "CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowHedgingMember": { "auth_ref": [ "r273" ], "lang": { "en-US": { "role": { "documentation": "Hedge of the exposure to variability in the cash flows of a recognized asset or liability, or of a forecasted transaction, that is attributable to a particular risk.", "label": "Cash Flow Hedging [Member]", "terseLabel": "Cash Flow Hedging [Member]", "verboseLabel": "Cash Flow Derivative Hedges" } } }, "localname": "CashFlowHedgingMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.", "label": "Class of Stock [Domain]", "terseLabel": "Class of Stock [Domain]" } } }, "localname": "ClassOfStockDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r45", "r197", "r328", "r341" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.", "label": "Commitments and Contingencies", "terseLabel": "Commitments and contingencies (Note 1)" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonStockDividendsPerShareCashPaid": { "auth_ref": [ "r201" ], "lang": { "en-US": { "role": { "documentation": "Aggregate dividends paid during the period for each share of common stock outstanding.", "label": "Common Stock, Dividends, Per Share, Cash Paid", "verboseLabel": "Dividends per share" } } }, "localname": "CommonStockDividendsPerShareCashPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r201" ], "lang": { "en-US": { "role": { "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.", "label": "Common Stock, Dividends, Per Share, Declared", "terseLabel": "Cash dividends declared, per share" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockHeldInTrust": { "auth_ref": [], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Value of common stock held in trust.", "label": "Common Stock Held in Trust", "negatedLabel": "Common stock held in trust for savings restoration plan (75,200 shares at March 31, 2020 and 74,798 shares at December 31, 2019)" } } }, "localname": "CommonStockHeldInTrust", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]", "terseLabel": "Common Stock" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockNoParValue": { "auth_ref": [ "r19" ], "lang": { "en-US": { "role": { "documentation": "Face amount per share of no-par value common stock.", "label": "Common Stock, No Par Value", "terseLabel": "Common stock, no par value" } } }, "localname": "CommonStockNoParValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesHeldInEmployeeTrustShares": { "auth_ref": [ "r242" ], "lang": { "en-US": { "role": { "documentation": "Number of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned.", "label": "Common Stock, Shares Held in Employee Trust, Shares", "terseLabel": "Common Stock, Shares Held in Employee Trust, Shares" } } }, "localname": "CommonStockSharesHeldInEmployeeTrustShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r19" ], "lang": { "en-US": { "role": { "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.", "label": "Common Stock, Shares, Issued", "terseLabel": "Common stock, shares issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r19", "r200" ], "lang": { "en-US": { "role": { "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.", "label": "Common Stock, Shares, Outstanding", "terseLabel": "Common stock, shares outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r19" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.", "label": "Common Stock, Value, Issued", "terseLabel": "Common stock, no par value (issued and outstanding - 33,510,714 shares at March 31, 2020 and 33,365,039 shares at December 31, 2019)" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Retirement Benefits [Abstract]", "terseLabel": "Retirement Benefits [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r70", "r72", "r73" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent", "totalLabel": "Comprehensive income (loss)" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r89" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.", "label": "Comprehensive Income (Loss) Note [Text Block]", "terseLabel": "Comprehensive Income (Loss) Note [Text Block]" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss" ], "xbrltype": "textBlockItemType" }, "us-gaap_ContractWithCustomerBasisOfPricingAxis": { "auth_ref": [ "r206" ], "lang": { "en-US": { "role": { "documentation": "Information by basis of pricing for contract representing right to consideration in exchange for good or service transferred to customer.", "label": "Contract with Customer, Basis of Pricing [Axis]", "terseLabel": "Contract with Customer, Basis of Pricing [Axis]" } } }, "localname": "ContractWithCustomerBasisOfPricingAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ContractWithCustomerBasisOfPricingDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Basis of pricing for contract with customer. Includes, but is not limited to, fixed-price and time-and-materials contracts.", "label": "Contract with Customer, Basis of Pricing [Domain]", "terseLabel": "Contract with Customer, Basis of Pricing [Domain]" } } }, "localname": "ContractWithCustomerBasisOfPricingDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ContractWithCustomerDurationAxis": { "auth_ref": [ "r207" ], "lang": { "en-US": { "role": { "documentation": "Information by duration of contract with customer. Includes, but is not limited to, short-term and long-term contracts.", "label": "Contract with Customer, Duration [Axis]", "terseLabel": "Contract with Customer, Duration [Axis]" } } }, "localname": "ContractWithCustomerDurationAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ContractWithCustomerDurationDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Duration of contract with customer. Includes, but is not limited to, short-term and long-term contracts.", "label": "Contract with Customer, Duration [Domain]", "terseLabel": "Contract with Customer, Duration [Domain]" } } }, "localname": "ContractWithCustomerDurationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ContractWithCustomerSalesChannelAxis": { "auth_ref": [ "r209" ], "lang": { "en-US": { "role": { "documentation": "Information by sales channel for delivery of good or service in contract with customer.", "label": "Contract with Customer, Sales Channel [Axis]", "terseLabel": "Contract with Customer, Sales Channel [Axis]" } } }, "localname": "ContractWithCustomerSalesChannelAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ContractWithCustomerSalesChannelDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sales channel for delivery of good or service in contract with customer. Includes, but is not limited to, directly to consumer and through intermediary.", "label": "Contract with Customer, Sales Channel [Domain]", "terseLabel": "Contract with Customer, Sales Channel [Domain]" } } }, "localname": "ContractWithCustomerSalesChannelDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CorporateMember": { "auth_ref": [ "r134" ], "lang": { "en-US": { "role": { "documentation": "Component of an entity that usually provides financial, operational and administrative support and is considered an operating segment. Excludes intersegment elimination and reconciling items.", "label": "Corporate Segment [Member]", "terseLabel": "Corporate Segment [Member]" } } }, "localname": "CorporateMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CostMethodInvestments": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.", "label": "Cost Method Investments", "terseLabel": "Cost Method Investments" } } }, "localname": "CostMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_CostOfGoodsAndServicesSold": { "auth_ref": [ "r82" ], "calculation": { "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails": { "order": 1.0, "parentTag": "tg_NetSales", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.", "label": "Cost of Goods and Services Sold", "verboseLabel": "Cost of goods sold" } } }, "localname": "CostOfGoodsAndServicesSold", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CostOfRevenueAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Cost of Revenue [Abstract]", "terseLabel": "Costs and expenses:" } } }, "localname": "CostOfRevenueAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_CostOfSalesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing cost of sales.", "label": "Cost of Sales [Member]", "netLabel": "Cost of Sales [Member]", "terseLabel": "Cost of Sales [Member]", "verboseLabel": "Cost Of Sales" } } }, "localname": "CostOfSalesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.", "label": "Cost-method Investments, Other than Temporary Impairment", "negatedTerseLabel": "Cost-method Investments, Other than Temporary Impairment", "terseLabel": "Cost-method investment, OTTI" } } }, "localname": "CostmethodInvestmentsOtherThanTemporaryImpairment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CostsAndExpenses": { "auth_ref": [ "r80" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total costs of sales and operating expenses for the period.", "label": "Costs and Expenses", "totalLabel": "Total" } } }, "localname": "CostsAndExpenses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredFinanceCostsNet": { "auth_ref": [ "r37", "r305" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.", "label": "Debt Issuance Costs, Net", "terseLabel": "Deferred Finance Costs, Net" } } }, "localname": "DeferredFinanceCostsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/NewAccountingPronouncementsNewAccountingPronouncementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetDomain": { "auth_ref": [ "r255" ], "lang": { "en-US": { "role": { "documentation": "Identification of the deferred tax asset for which a valuation reserve exists.", "label": "Deferred Tax Asset [Domain]", "terseLabel": "Deferred Tax Asset [Domain]" } } }, "localname": "DeferredTaxAssetDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent": { "auth_ref": [ "r245", "r247", "r256" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting and classified as noncurrent.", "label": "Deferred Tax Assets, Net, Noncurrent", "terseLabel": "Deferred Tax Assets, Net, Noncurrent" } } }, "localname": "DeferredTaxAssetsLiabilitiesNetNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNetCurrent": { "auth_ref": [ "r245", "r246", "r247", "r248", "r254" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current.", "label": "Deferred Tax Assets, Net of Valuation Allowance, Current", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredTaxAssetsNetCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r255" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.", "label": "Deferred Tax Assets, Valuation Allowance", "terseLabel": "Deferred Tax Assets, Valuation Allowance" } } }, "localname": "DeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesNoncurrent": { "auth_ref": [ "r245", "r247", "r248" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.", "label": "Deferred Tax Liabilities, Net, Noncurrent", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredTaxLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet": { "auth_ref": [ "r214", "r219" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.", "label": "Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position", "terseLabel": "Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position" } } }, "localname": "DefinedBenefitPlanAmountsRecognizedInBalanceSheet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanContributionsByEmployer": { "auth_ref": [ "r218", "r220", "r221", "r238", "r239" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of contribution received by defined benefit plan from employer which increases plan assets.", "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer", "terseLabel": "Contribution to pension plans for continuing operations" } } }, "localname": "DefinedBenefitPlanContributionsByEmployer", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanDisclosureLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Defined Benefit Plan Disclosure [Line Items]", "terseLabel": "Defined Benefit Plan Disclosure [Line Items]" } } }, "localname": "DefinedBenefitPlanDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": { "auth_ref": [ "r225", "r236", "r239" ], "calculation": { "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": 3.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.", "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets", "negatedTerseLabel": "Expected return on plan assets" } } }, "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanInterestCost": { "auth_ref": [ "r217", "r224", "r235", "r239" ], "calculation": { "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": 2.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.", "label": "Defined Benefit Plan, Interest Cost", "terseLabel": "Interest cost" } } }, "localname": "DefinedBenefitPlanInterestCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": { "auth_ref": [ "r222", "r233", "r239" ], "calculation": { "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.", "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)", "totalLabel": "Net periodic benefit cost" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1": { "auth_ref": [ "r226", "r237" ], "calculation": { "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": 5.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.", "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment", "negatedTerseLabel": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment" } } }, "localname": "DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanServiceCost": { "auth_ref": [ "r216", "r223", "r234", "r239" ], "calculation": { "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails": { "order": 1.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan, Service Cost", "terseLabel": "Service cost" } } }, "localname": "DefinedBenefitPlanServiceCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable": { "auth_ref": [ "r229", "r230", "r231", "r232", "r239" ], "lang": { "en-US": { "role": { "documentation": "Disclosures and provisions pertaining to defined benefit pension plans or other postretirement defined benefit plans. The arrangements are generally based on terms and conditions stipulated by the entity, and which contain a promise by the employer to pay certain amounts or awards at designated future dates, including a period after retirement, upon compliance with stipulated requirements. Excludes disclosures pertaining to defined contribution plans.", "label": "Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]", "terseLabel": "Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]" } } }, "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]", "terseLabel": "Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]" } } }, "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_Depreciation": { "auth_ref": [ "r104", "r172" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.", "label": "Depreciation", "terseLabel": "Depreciation" } } }, "localname": "Depreciation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepreciationDepletionAndAmortization": { "auth_ref": [ "r104", "r137" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.", "label": "Depreciation, Depletion and Amortization", "terseLabel": "Depreciation, Depletion and Amortization" } } }, "localname": "DepreciationDepletionAndAmortization", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeContractTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.", "label": "Derivative Contract [Domain]", "terseLabel": "Derivative Contract [Domain]", "verboseLabel": "Derivative Contract Type [Domain]" } } }, "localname": "DerivativeContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DerivativeFairValueOfDerivativeAsset": { "auth_ref": [ "r54", "r55", "r279", "r322" ], "calculation": { "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails": { "order": 1.0, "parentTag": "us-gaap_DerivativeFairValueOfDerivativeNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.", "label": "Derivative Asset, Fair Value, Gross Asset", "terseLabel": "Derivative Asset, Fair Value, Gross Asset" } } }, "localname": "DerivativeFairValueOfDerivativeAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeFairValueOfDerivativeLiability": { "auth_ref": [ "r54", "r55", "r279", "r322" ], "calculation": { "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails": { "order": 2.0, "parentTag": "us-gaap_DerivativeFairValueOfDerivativeNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.", "label": "Derivative Liability, Fair Value, Gross Liability", "negatedTerseLabel": "Liability derivatives: Fair Value", "terseLabel": "Derivative Liability, Fair Value, Gross Liability" } } }, "localname": "DerivativeFairValueOfDerivativeLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeFairValueOfDerivativeNet": { "auth_ref": [ "r298" ], "calculation": { "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of the assets less the liabilities of a derivative or group of derivatives.", "label": "Derivative, Fair Value, Net", "terseLabel": "Net asset (liability), Fair Value", "totalLabel": "Net asset (liability), Fair Value" } } }, "localname": "DerivativeFairValueOfDerivativeNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentRiskAxis": { "auth_ref": [ "r277", "r280", "r285", "r287" ], "lang": { "en-US": { "role": { "documentation": "Information by type of derivative contract.", "label": "Derivative Instrument [Axis]", "terseLabel": "Derivative Instrument [Axis]" } } }, "localname": "DerivativeInstrumentRiskAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Derivative Instruments and Hedging Activities Disclosure [Abstract]", "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Abstract]" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": { "auth_ref": [ "r295" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.", "label": "Derivative Instruments and Hedging Activities Disclosure [Text Block]", "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Text Block]", "verboseLabel": "Derivative Financial Instruments" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstruments", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis": { "auth_ref": [ "r274", "r277", "r285" ], "lang": { "en-US": { "role": { "documentation": "Information by type of hedging relationship.", "label": "Hedging Relationship [Axis]", "terseLabel": "Hedging Relationship [Axis]" } } }, "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable": { "auth_ref": [ "r274", "r277", "r285", "r287", "r288", "r291", "r292" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.", "label": "Derivative Instruments, Gain (Loss) [Table]", "terseLabel": "Derivative Instruments, Gain (Loss) [Table]" } } }, "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsGainLossLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivative Instruments, Gain (Loss) [Line Items]", "terseLabel": "Derivative Instruments, Gain (Loss) [Line Items]" } } }, "localname": "DerivativeInstrumentsGainLossLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet": { "auth_ref": [ "r284", "r286" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.", "label": "Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net", "terseLabel": "Amount of pretax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income effective portion)" } } }, "localname": "DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivative [Line Items]", "terseLabel": "Derivative [Line Items]" } } }, "localname": "DerivativeLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeNonmonetaryNotionalAmountMass": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nominal mass used to calculate payments on a derivative instrument.", "label": "Derivative, Nonmonetary Notional Amount, Mass", "terseLabel": "Weight of aluminum that hedged future purchase of aluminum to meet fixed - price forward sales contract obligations, lbs" } } }, "localname": "DerivativeNonmonetaryNotionalAmountMass", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "massItemType" }, "us-gaap_DerivativeNotionalAmount": { "auth_ref": [ "r270", "r272" ], "lang": { "en-US": { "role": { "documentation": "Nominal or face amount used to calculate payment on derivative.", "label": "Derivative, Notional Amount", "terseLabel": "Derivative, Notional Amount" } } }, "localname": "DerivativeNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeTable": { "auth_ref": [ "r116", "r269", "r271", "r272", "r274", "r275", "r282", "r285", "r289", "r290", "r292" ], "lang": { "en-US": { "role": { "documentation": "Schedule that describes and identifies a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.", "label": "Derivative [Table]", "terseLabel": "Derivative [Table]" } } }, "localname": "DerivativeTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativesFairValueLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivatives, Fair Value [Line Items]", "terseLabel": "Derivatives, Fair Value [Line Items]" } } }, "localname": "DerivativesFairValueLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "stringItemType" }, "us-gaap_DescriptionOfNewAccountingPronouncementsNotYetAdopted": { "auth_ref": [ "r120" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for a new accounting pronouncement that has been issued but not yet adopted.", "label": "Description of New Accounting Pronouncements Not yet Adopted [Text Block]", "terseLabel": "New Accounting Pronouncements" } } }, "localname": "DescriptionOfNewAccountingPronouncementsNotYetAdopted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/NewAccountingPronouncements" ], "xbrltype": "textBlockItemType" }, "us-gaap_DesignatedAsHedgingInstrumentMember": { "auth_ref": [ "r274" ], "lang": { "en-US": { "role": { "documentation": "Derivative instrument designated as hedging instrument under Generally Accepted Accounting Principles (GAAP).", "label": "Designated as Hedging Instrument [Member]", "terseLabel": "Derivatives Designated As Hedging Instruments [Member]" } } }, "localname": "DesignatedAsHedgingInstrumentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DisaggregationOfRevenueLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Disaggregation of Revenue [Line Items]", "terseLabel": "Disaggregation of Revenue [Line Items]" } } }, "localname": "DisaggregationOfRevenueLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.", "label": "Disaggregation of Revenue [Table]", "terseLabel": "Disaggregation of Revenue [Table]" } } }, "localname": "DisaggregationOfRevenueTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTableTextBlock": { "auth_ref": [ "r202" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.", "label": "Disaggregation of Revenue [Table Text Block]", "terseLabel": "Disaggregation of Revenue [Table Text Block]" } } }, "localname": "DisaggregationOfRevenueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DividendsCommonStockCash": { "auth_ref": [ "r201" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.", "label": "Dividends, Common Stock, Cash", "negatedLabel": "Cash dividends declared ($0.12 per share)" } } }, "localname": "DividendsCommonStockCash", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_DividendsReceivable": { "auth_ref": [ "r52" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of dividends declared but not received.", "label": "Dividends Receivable", "terseLabel": "Dividends Receivable" } } }, "localname": "DividendsReceivable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share [Abstract]", "terseLabel": "Basic" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r79", "r119", "r123", "r126", "r127", "r128", "r131", "r333", "r346" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.", "label": "Earnings Per Share, Basic", "totalLabel": "Basic" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r79", "r119", "r123", "r126", "r127", "r128", "r131", "r333", "r346" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Earnings Per Share, Diluted", "totalLabel": "Diluted" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDilutedAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share, Diluted [Abstract]", "terseLabel": "Diluted" } } }, "localname": "EarningsPerShareDilutedAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r132" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Earnings Per Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/EarningsPerShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents": { "auth_ref": [ "r299" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.", "label": "Effect of Exchange Rate on Cash and Cash Equivalents", "terseLabel": "Effect of exchange rate changes on cash" } } }, "localname": "EffectOfExchangeRateOnCashAndCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectOnFutureCashFlowsAmount": { "auth_ref": [ "r192" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The quantified amount of the future effect on cash flows.", "label": "Effect on Future Cash Flows, Amount", "terseLabel": "Effect on Future Cash Flows, Amount" } } }, "localname": "EffectOnFutureCashFlowsAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperations": { "auth_ref": [ "r115", "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Effective Income Tax Rate Reconciliation, Percent", "negatedTotalLabel": "Effective income tax rate for income from continuing operations", "totalLabel": "Effective Income Tax Rate Reconciliation, Percent" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 1.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent", "terseLabel": "Income tax expense at federal statutory rate", "verboseLabel": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends": { "auth_ref": [ "r249", "r250", "r257" ], "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent", "terseLabel": "Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionsDividends", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 11.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent", "terseLabel": "Domestic production activities deduction", "verboseLabel": "Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 2.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.", "label": "Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent", "terseLabel": "Foreign rate differences", "verboseLabel": "Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 5.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent", "terseLabel": "Non-deductible expenses", "verboseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses": { "auth_ref": [ "r249", "r250", "r257" ], "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to impairment loss.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent", "terseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 4.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent", "terseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments": { "auth_ref": [ "r249", "r250", "r257" ], "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Percent", "verboseLabel": "Other" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 8.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense.", "label": "Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent", "terseLabel": "Changes in estimates related to prior year tax provision" } } }, "localname": "EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 13.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the repatriation of foreign earnings.", "label": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent", "terseLabel": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount" } } }, "localname": "EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 3.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent", "terseLabel": "State taxes, net of federal income tax benefit", "verboseLabel": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 7.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.", "label": "Effective Income Tax Rate Reconciliation, Tax Contingency, Percent", "terseLabel": "Income tax contingency accruals and tax settlements", "verboseLabel": "Effective Income Tax Rate Reconciliation, Tax Contingency, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxContingencies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 16.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.", "label": "Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent", "terseLabel": "Foreign tax incentives", "verboseLabel": "Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxCreditsForeign", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch": { "auth_ref": [ "r249", "r250", "r257" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 14.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.", "label": "Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent", "terseLabel": "Research and development tax credit" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxCreditsResearch", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeSeveranceMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Termination of an employee associated with exit from or disposal of business activities or restructurings pursuant to a plan.", "label": "Employee Severance [Member]", "terseLabel": "Severance" } } }, "localname": "EmployeeSeveranceMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EnvironmentalExitCostsAnticipatedCost": { "auth_ref": [ "r199" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total anticipated costs associated with remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal, or abandonment of a particular property resulting from unanticipated contamination of the assets.", "label": "Environmental Exit Costs, Anticipated Cost", "terseLabel": "Environmental Exit Costs, Anticipated Cost" } } }, "localname": "EnvironmentalExitCostsAnticipatedCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EnvironmentalRemediationExpense": { "auth_ref": [ "r180", "r181" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.", "label": "Environmental Remediation Expense", "terseLabel": "Environmental Remediation Expense" } } }, "localname": "EnvironmentalRemediationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r200" ], "lang": { "en-US": { "role": { "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.", "label": "Equity Component [Domain]", "terseLabel": "Equity Component [Domain]" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Equity Method Investments and Joint Ventures [Abstract]", "terseLabel": "Equity Method Investments and Joint Ventures [Abstract]" } } }, "localname": "EquityMethodInvestmentsAndJointVenturesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EscrowDepositDisbursementsRelatedToPropertyAcquisition1": { "auth_ref": [ "r107", "r108", "r109" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of escrow deposit disbursements related to property acquisition in noncash investing or financing transactions.", "label": "Escrow Deposit Disbursements Related to Property Acquisition", "negatedTerseLabel": "Escrow Deposit Disbursements Related to Property Acquisition" } } }, "localname": "EscrowDepositDisbursementsRelatedToPropertyAcquisition1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_FacilityClosingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Closing of a facility associated with exit from or disposal of business activities or restructurings pursuant to a plan.", "label": "Facility Closing [Member]", "terseLabel": "Facility Closing" } } }, "localname": "FacilityClosingMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": { "auth_ref": [ "r296" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.", "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]", "terseLabel": "Fair Value Measurements, Sensitivity Analysis, Description" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentskaleosensitivitytableTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable": { "auth_ref": [ "r276", "r282", "r291" ], "lang": { "en-US": { "role": { "documentation": "Schedule that discloses the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.", "label": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]", "terseLabel": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]" } } }, "localname": "FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetUsefulLife": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Finite-Lived Intangible Asset, Useful Life", "verboseLabel": "Finite-Lived Intangible Asset, Useful Life" } } }, "localname": "FiniteLivedIntangibleAssetUsefulLife", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "durationItemType" }, "us-gaap_FiniteLivedTradeNamesGross": { "auth_ref": [ "r168" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Gross carrying amount before accumulated amortization as of the balance sheet date of the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a reasonably expected period of economic benefit.", "label": "Finite-Lived Trade Names, Gross", "terseLabel": "Finite-Lived Trade Names, Gross" } } }, "localname": "FiniteLivedTradeNamesGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet": { "auth_ref": [ "r278" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value as of the balance sheet date of all foreign currency derivatives designated as cash flow hedging instruments.", "label": "Foreign Currency Cash Flow Hedge Derivative at Fair Value, Net", "terseLabel": "Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax" } } }, "localname": "ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignCurrencyExchangeRateTranslation1": { "auth_ref": [ "r303" ], "lang": { "en-US": { "role": { "documentation": "Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.", "label": "Foreign Currency Exchange Rate, Translation", "terseLabel": "Foreign Currency Exchange Rate, Translation" } } }, "localname": "ForeignCurrencyExchangeRateTranslation1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "pureItemType" }, "us-gaap_ForeignEarningsRepatriated": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of foreign earnings repatriated from subsidiaries outside the country of domicile.", "label": "Foreign Earnings Repatriated", "terseLabel": "Foreign Earnings Repatriated" } } }, "localname": "ForeignEarningsRepatriated", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations": { "auth_ref": [ "r114" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.", "label": "Foreign Income Tax Expense (Benefit), Continuing Operations", "terseLabel": "Foreign Income Tax Expense (Benefit), Continuing Operations" } } }, "localname": "ForeignIncomeTaxExpenseBenefitContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnDispositionOfAssets1": { "auth_ref": [ "r104" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.", "label": "Gain (Loss) on Disposition of Assets", "terseLabel": "Gain (Loss) on Disposition of Assets" } } }, "localname": "GainLossOnDispositionOfAssets1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnSaleOfPropertyPlantEquipment": { "auth_ref": [ "r104" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.", "label": "Gain (Loss) on Disposition of Property Plant Equipment", "negatedTerseLabel": "Gain (Loss) on Disposition of Property Plant Equipment" } } }, "localname": "GainLossOnSaleOfPropertyPlantEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Goodwill": { "auth_ref": [ "r158", "r160" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill", "terseLabel": "Goodwill" } } }, "localname": "Goodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Goodwill and Intangible Assets Disclosure [Abstract]", "terseLabel": "Goodwill and Intangible Assets Disclosure [Abstract]" } } }, "localname": "GoodwillAndIntangibleAssetsDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_GoodwillDisclosureTextBlock": { "auth_ref": [ "r164" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for goodwill.", "label": "Goodwill Disclosure [Text Block]", "terseLabel": "Goodwill Disclosure [Text Block]" } } }, "localname": "GoodwillDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentGoodwillImpairmentNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_GoodwillImpairmentLoss": { "auth_ref": [ "r104", "r159", "r161", "r163" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill, Impairment Loss", "negatedTerseLabel": "Goodwill, Impairment Loss", "terseLabel": "Goodwill, Impairment Loss" } } }, "localname": "GoodwillImpairmentLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GoodwillImpairmentLossNetOfTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of loss recognized that results from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill, Impairment Loss, Net of Tax", "terseLabel": "Goodwill, Impairment Loss, Net of Tax" } } }, "localname": "GoodwillImpairmentLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_HedgingDesignationAxis": { "auth_ref": [ "r274", "r288" ], "lang": { "en-US": { "role": { "documentation": "Information by designation of purpose of derivative instrument.", "label": "Hedging Designation [Axis]", "terseLabel": "Hedging Designation [Axis]" } } }, "localname": "HedgingDesignationAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_HedgingDesignationDomain": { "auth_ref": [ "r274" ], "lang": { "en-US": { "role": { "documentation": "Designation of purpose of derivative instrument.", "label": "Hedging Designation [Domain]", "terseLabel": "Hedging Designation [Domain]" } } }, "localname": "HedgingDesignationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_HedgingRelationshipDomain": { "auth_ref": [ "r274" ], "lang": { "en-US": { "role": { "documentation": "Nature or intent of a hedge.", "label": "Hedging Relationship [Domain]", "terseLabel": "Hedging Relationship [Domain]" } } }, "localname": "HedgingRelationshipDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Impaired Long-Lived Assets Held and Used [Line Items]", "terseLabel": "Impaired Long-Lived Assets Held and Used [Line Items]" } } }, "localname": "ImpairedLongLivedAssetsHeldAndUsedLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf": { "auth_ref": [ "r104", "r170" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.", "label": "Impairment of Long-Lived Assets to be Disposed of", "terseLabel": "Impairment of Long-Lived Assets to be Disposed of" } } }, "localname": "ImpairmentOfLongLivedAssetsToBeDisposedOf", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairmentOfRealEstate": { "auth_ref": [ "r104", "r176" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The charge against earnings in the period to reduce the carrying amount of real property to fair value.", "label": "Impairment of Real Estate", "terseLabel": "Impairment of Real Estate" } } }, "localname": "ImpairmentOfRealEstate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperations": { "auth_ref": [ "r81", "r105", "r128", "r263" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of income (loss) from continuing operations attributable to the parent.", "label": "Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent", "terseLabel": "Income from continuing operations", "totalLabel": "Income (loss) from continuing operations" } } }, "localname": "IncomeLossFromContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": { "auth_ref": [ "r76", "r119", "r324", "r330", "r347" ], "calculation": { "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails": { "order": 3.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 }, "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperations", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.", "label": "Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest", "negatedTerseLabel": "Income before income taxes", "netLabel": "Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest", "terseLabel": "Income (loss) before income taxes", "verboseLabel": "Income from continuing operations before income taxes" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsPerBasicShare": { "auth_ref": [ "r75", "r79", "r123", "r126", "r127", "r329", "r331", "r333", "r343" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_EarningsPerShareBasic", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.", "label": "Income (Loss) from Continuing Operations, Per Basic Share", "terseLabel": "Continuing operations" } } }, "localname": "IncomeLossFromContinuingOperationsPerBasicShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare": { "auth_ref": [ "r75", "r79", "r123", "r126", "r127", "r128", "r333", "r343", "r346" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_EarningsPerShareDiluted", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Income (Loss) from Continuing Operations, Per Diluted Share", "terseLabel": "Continuing operations" } } }, "localname": "IncomeLossFromContinuingOperationsPerDilutedShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax": { "auth_ref": [ "r0", "r1", "r2", "r3", "r4", "r6", "r79", "r344" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.", "label": "Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest", "verboseLabel": "Income (loss) from discontinued operations, net of tax" } } }, "localname": "IncomeLossFromDiscontinuedOperationsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare": { "auth_ref": [ "r77", "r79", "r125", "r126", "r127", "r333", "r344", "r346" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_EarningsPerShareBasic", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.", "label": "Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share", "terseLabel": "Discontinued operations" } } }, "localname": "IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare": { "auth_ref": [ "r125", "r126", "r127", "r268" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_EarningsPerShareDiluted", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.", "label": "Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share", "terseLabel": "Discontinued operations" } } }, "localname": "IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Statement [Abstract]", "terseLabel": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationAxis": { "auth_ref": [ "r178" ], "lang": { "en-US": { "role": { "documentation": "Information by location in the income statement.", "label": "Income Statement Location [Axis]", "terseLabel": "Income Statement Location [Axis]" } } }, "localname": "IncomeStatementLocationAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Location in the income statement.", "label": "Income Statement Location [Domain]", "terseLabel": "Income Statement and Other Comprehensive Income (Loss) Location [Domain]", "verboseLabel": "Income Statement Location [Domain]" } } }, "localname": "IncomeStatementLocationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_IncomeTaxAuthorityAxis": { "auth_ref": [ "r252" ], "lang": { "en-US": { "role": { "documentation": "Information by tax jurisdiction.", "label": "Income Tax Authority [Axis]", "terseLabel": "Income Tax Authority [Axis]" } } }, "localname": "IncomeTaxAuthorityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxAuthorityDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Agency, division or body classification that levies income taxes, examines tax returns for compliance, or grants exemptions from or makes other decisions pertaining to income taxes.", "label": "Income Tax Authority [Domain]", "terseLabel": "Income Tax Authority [Domain]" } } }, "localname": "IncomeTaxAuthorityDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Tax Disclosure [Abstract]", "terseLabel": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r260" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.", "label": "Income Tax Disclosure [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExaminationInterestAccrued": { "auth_ref": [ "r251" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations.", "label": "Income Tax Examination, Interest Accrued", "terseLabel": "Income Tax Examination, Interest Accrued" } } }, "localname": "IncomeTaxExaminationInterestAccrued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExaminationInterestExpense": { "auth_ref": [ "r251" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of estimated interest recognized in the period arising from income tax examinations.", "label": "Income Tax Examination, Interest Expense", "terseLabel": "Income Tax Examination, Interest Expense" } } }, "localname": "IncomeTaxExaminationInterestExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r113", "r138", "r259" ], "calculation": { "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails": { "order": 2.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 }, "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperations", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Income Tax Expense (Benefit)", "negatedLabel": "Income taxes from continuing operations", "terseLabel": "Income Tax Expense (Benefit)", "verboseLabel": "Income taxes from continuing operations" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxHolidayAggregateDollarAmount": { "auth_ref": [ "r258" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.", "label": "Income Tax Holiday, Aggregate Dollar Amount", "terseLabel": "Income Tax Holiday, Aggregate Dollar Amount" } } }, "localname": "IncomeTaxHolidayAggregateDollarAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare": { "auth_ref": [ "r258" ], "lang": { "en-US": { "role": { "documentation": "Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.", "label": "Income Tax Holiday, Income Tax Benefits Per Share", "terseLabel": "Income Tax Holiday, Income Tax Benefits Per Share" } } }, "localname": "IncomeTaxHolidayIncomeTaxBenefitsPerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_IncomeTaxReconciliationDeductions": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Amount", "negatedTotalLabel": "Effective Income Tax Rate Reconciliation, Deduction, Amount", "totalLabel": "Effective Income Tax Rate Reconciliation, Deduction, Amount" } } }, "localname": "IncomeTaxReconciliationDeductions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationDeductionsDividends": { "auth_ref": [ "r249", "r250" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount" } } }, "localname": "IncomeTaxReconciliationDeductionsDividends", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 30.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount" } } }, "localname": "IncomeTaxReconciliationDeductionsQualifiedProductionActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential": { "auth_ref": [ "r111", "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 22.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount" } } }, "localname": "IncomeTaxReconciliationForeignIncomeTaxRateDifferential", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r112", "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 21.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount" } } }, "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationNondeductibleExpense": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 25.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount" } } }, "localname": "IncomeTaxReconciliationNondeductibleExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses": { "auth_ref": [ "r249", "r250" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible impairment loss.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount" } } }, "localname": "IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 24.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.", "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount" } } }, "localname": "IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 28.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount" } } }, "localname": "IncomeTaxReconciliationPriorYearIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 13.0, "parentTag": "us-gaap_IncomeTaxReconciliationDeductions", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings.", "label": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount" } } }, "localname": "IncomeTaxReconciliationRepatriationOfForeignEarnings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes": { "auth_ref": [ "r112", "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 23.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount" } } }, "localname": "IncomeTaxReconciliationStateAndLocalIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationTaxCredits": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 34.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.", "label": "Effective Income Tax Rate Reconciliation, Tax Credit, Amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation, Tax Credit, Amount" } } }, "localname": "IncomeTaxReconciliationTaxCredits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationTaxCreditsResearch": { "auth_ref": [ "r249", "r250" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 32.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.", "label": "Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount", "negatedTerseLabel": "Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount" } } }, "localname": "IncomeTaxReconciliationTaxCreditsResearch", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationTaxSettlementsOther": { "auth_ref": [ "r249", "r250" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other income tax settlements.", "label": "Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount" } } }, "localname": "IncomeTaxReconciliationTaxSettlementsOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesReceivable": { "auth_ref": [ "r47", "r327", "r342" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.", "label": "Income Taxes Receivable, Current", "terseLabel": "Income Taxes Receivable, Current" } } }, "localname": "IncomeTaxesReceivable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables": { "auth_ref": [ "r103" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.", "label": "Increase (Decrease) in Accounts and Other Receivables", "negatedLabel": "Accounts and other receivables" } } }, "localname": "IncreaseDecreaseInAccountsAndOtherReceivables", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities": { "auth_ref": [ "r103" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.", "label": "Increase (Decrease) in Accounts Payable and Accrued Liabilities", "terseLabel": "Accounts payable and accrued expenses" } } }, "localname": "IncreaseDecreaseInAccountsPayableAndAccruedLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable": { "auth_ref": [ "r103" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes.", "label": "Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable", "terseLabel": "Income taxes recoverable/payable" } } }, "localname": "IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInInventories": { "auth_ref": [ "r103" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.", "label": "Increase (Decrease) in Inventories", "negatedLabel": "Inventories" } } }, "localname": "IncreaseDecreaseInInventories", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Increase (Decrease) in Operating Capital [Abstract]", "terseLabel": "Changes in assets and liabilities:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": { "auth_ref": [ "r103" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in prepaid expenses, and assets classified as other.", "label": "Increase (Decrease) in Prepaid Expense and Other Assets", "negatedLabel": "Prepaid expenses and other" } } }, "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements": { "auth_ref": [ "r124", "r130" ], "calculation": { "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails": { "order": 1.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.", "label": "Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements", "terseLabel": "Incremental dilutive shares attributable to stock options and restricted stock" } } }, "localname": "IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_IntangibleAssetsNetExcludingGoodwill": { "auth_ref": [ "r165", "r167" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.", "label": "Intangible Assets, Net (Excluding Goodwill)", "verboseLabel": "Intangible Assets, Net (Excluding Goodwill)" } } }, "localname": "IntangibleAssetsNetExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestAndDebtExpense": { "auth_ref": [ "r304" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Interest and debt related expenses associated with nonoperating financing activities of the entity.", "label": "Interest and Debt Expense", "terseLabel": "Interest expense", "verboseLabel": "Interest expense" } } }, "localname": "InterestAndDebtExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryDisclosureTextBlock": { "auth_ref": [ "r157" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.", "label": "Inventory Disclosure [Text Block]", "terseLabel": "Inventories" } } }, "localname": "InventoryDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/Inventories" ], "xbrltype": "textBlockItemType" }, "us-gaap_InventoryFinishedGoodsNetOfReserves": { "auth_ref": [ "r27", "r156" ], "calculation": { "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails": { "order": 1.0, "parentTag": "us-gaap_InventoryNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.", "label": "Inventory, Finished Goods, Net of Reserves", "terseLabel": "Finished goods" } } }, "localname": "InventoryFinishedGoodsNetOfReserves", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryNet": { "auth_ref": [ "r8", "r51", "r153" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 }, "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.", "label": "Inventory, Net", "terseLabel": "Inventories", "totalLabel": "Total" } } }, "localname": "InventoryNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryNetAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Inventory, Net [Abstract]", "terseLabel": "Inventory, Net [Abstract]" } } }, "localname": "InventoryNetAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_InventoryRawMaterialsNetOfReserves": { "auth_ref": [ "r28", "r156" ], "calculation": { "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails": { "order": 2.0, "parentTag": "us-gaap_InventoryNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.", "label": "Inventory, Raw Materials, Net of Reserves", "terseLabel": "Raw materials" } } }, "localname": "InventoryRawMaterialsNetOfReserves", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventorySuppliesNetOfReserves": { "auth_ref": [ "r50", "r155" ], "calculation": { "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails": { "order": 3.0, "parentTag": "us-gaap_InventoryNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.", "label": "Inventory, Supplies, Net of Reserves", "terseLabel": "Stores, supplies and other" } } }, "localname": "InventorySuppliesNetOfReserves", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryWorkInProcess": { "auth_ref": [ "r49" ], "calculation": { "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails": { "order": 4.0, "parentTag": "us-gaap_InventoryNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.", "label": "Inventory, Work in Process, Gross", "terseLabel": "Work-in-process" } } }, "localname": "InventoryWorkInProcess", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InventoriesScheduleOfComponentsOfInventoriesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryWriteDown": { "auth_ref": [ "r154" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.", "label": "Inventory Write-down", "terseLabel": "Inventory Write-down" } } }, "localname": "InventoryWriteDown", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeDividend": { "auth_ref": [ "r85" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of dividend income on nonoperating securities.", "label": "Investment Income, Dividend", "terseLabel": "Investment Income, Dividend" } } }, "localname": "InvestmentIncomeDividend", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeInterest": { "auth_ref": [ "r86", "r136" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.", "label": "Investment Income, Interest", "terseLabel": "Interest income" } } }, "localname": "InvestmentIncomeInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentOwnedAtFairValue": { "auth_ref": [ "r352", "r357", "r359", "r361", "r362" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.", "label": "Investment Owned, at Fair Value", "terseLabel": "Carrying value" } } }, "localname": "InvestmentOwnedAtFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsAndOtherNoncurrentAssetsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for investments and other noncurrent assets.", "label": "Investments and Other Noncurrent Assets [Text Block]", "terseLabel": "Investments" } } }, "localname": "InvestmentsAndOtherNoncurrentAssetsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/Investments" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeaseAndRentalExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.", "label": "Operating Leases, Rent Expense", "terseLabel": "Operating Leases, Rent Expense" } } }, "localname": "LeaseAndRentalExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Leases [Abstract]", "terseLabel": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r316" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.", "label": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]", "terseLabel": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r316" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount", "terseLabel": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeasesTextBlock": { "auth_ref": [ "r319" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.", "label": "Lessee, Operating Leases [Text Block]", "terseLabel": "Lessee, Operating Leases [Text Block]" } } }, "localname": "LesseeOperatingLeasesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r40" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.", "label": "Liabilities", "totalLabel": "Total liabilities" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r24", "r326", "r338" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.", "label": "Liabilities and Equity", "totalLabel": "Total liabilities and shareholders\u2019 equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities and Equity [Abstract]", "terseLabel": "Liabilities and Shareholders\u2019 Equity" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesCurrent": { "auth_ref": [ "r42" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.", "label": "Liabilities, Current", "totalLabel": "Total current liabilities" } } }, "localname": "LiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Current [Abstract]", "terseLabel": "Current liabilities:" } } }, "localname": "LiabilitiesCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LongTermDebtNoncurrent": { "auth_ref": [ "r43" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt, Excluding Current Maturities", "terseLabel": "Long-term debt" } } }, "localname": "LongTermDebtNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LossFromCatastrophes": { "auth_ref": [ "r87" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake).", "label": "Loss from Catastrophes", "terseLabel": "Loss from Catastrophes" } } }, "localname": "LossFromCatastrophes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MeasurementInputDiscountRateMember": { "auth_ref": [ "r296" ], "lang": { "en-US": { "role": { "documentation": "Measurement input using interest rate to determine present value of future cash flows.", "label": "Measurement Input, Discount Rate [Member]", "terseLabel": "Measurement Input, Discount Rate [Member]" } } }, "localname": "MeasurementInputDiscountRateMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputTypeAxis": { "auth_ref": [ "r296" ], "lang": { "en-US": { "role": { "documentation": "Information by type of measurement input used to determine value of asset and liability.", "label": "Measurement Input Type [Axis]", "terseLabel": "Measurement Input Type [Axis]" } } }, "localname": "MeasurementInputTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "stringItemType" }, "us-gaap_MeasurementInputTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Measurement input used to determine value of asset and liability.", "label": "Measurement Input Type [Domain]", "terseLabel": "Measurement Input Type [Domain]" } } }, "localname": "MeasurementInputTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "us-gaap_NetAssetsGeographicAreaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of the total assets less the total liabilities of a designated geographic area ( such as a state, country, continent, or market) when it serves as a benchmark in a concentration of risk calculation.", "label": "Net Assets, Geographic Area [Member]", "terseLabel": "Net Assets, Geographic Area [Member]" } } }, "localname": "NetAssetsGeographicAreaMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r100" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.", "label": "Net Cash Provided by (Used in) Financing Activities", "totalLabel": "Net cash (used in) provided by financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]", "terseLabel": "Cash flows from financing activities:" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r100" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.", "label": "Net Cash Provided by (Used in) Investing Activities", "totalLabel": "Net cash used in investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]", "terseLabel": "Cash flows from investing activities:" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r100", "r102", "r105" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.", "label": "Net Cash Provided by (Used in) Operating Activities", "terseLabel": "Net Cash Provided by (Used in) Operating Activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Cash flows from operating activities:" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r68", "r71", "r78", "r105", "r130", "r332", "r345" ], "calculation": { "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 1.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 }, "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.", "label": "Net Income (Loss) Attributable to Parent", "terseLabel": "Net income (loss)", "totalLabel": "Net income (loss)", "verboseLabel": "Net income (loss)" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "New Accounting Pronouncements and Changes in Accounting Principles [Abstract]", "terseLabel": "New Accounting Pronouncements and Changes in Accounting Principles [Abstract]" } } }, "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_NondesignatedMember": { "auth_ref": [ "r274" ], "lang": { "en-US": { "role": { "documentation": "Derivative instrument not designated as hedging instrument under Generally Accepted Accounting Principles (GAAP).", "label": "Not Designated as Hedging Instrument [Member]", "terseLabel": "Derivatives Not Designated As Hedging Instruments" } } }, "localname": "NondesignatedMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r312" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease, Liability", "terseLabel": "Operating Lease, Liability" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityCurrent": { "auth_ref": [ "r312" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.", "label": "Operating Lease, Liability, Current", "terseLabel": "Operating Lease, Liability, Current" } } }, "localname": "OperatingLeaseLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityNoncurrent": { "auth_ref": [ "r312" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.", "label": "Operating Lease, Liability, Noncurrent", "terseLabel": "Operating Lease, Liability, Noncurrent" } } }, "localname": "OperatingLeaseLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails", "http://www.tredegar.com/role/NewAccountingPronouncementsNewAccountingPronouncementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r311" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease, Right-of-Use Asset", "terseLabel": "Operating Lease, Right-of-Use Asset" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails", "http://www.tredegar.com/role/NewAccountingPronouncementsNewAccountingPronouncementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r315", "r318" ], "lang": { "en-US": { "role": { "documentation": "Weighted average discount rate for operating lease calculated at point in time.", "label": "Operating Lease, Weighted Average Discount Rate, Percent", "terseLabel": "Operating Lease, Weighted Average Discount Rate, Percent" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r314", "r318" ], "lang": { "en-US": { "role": { "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Operating Lease, Weighted Average Remaining Lease Term", "terseLabel": "Operating Lease, Weighted Average Remaining Lease Term" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.", "label": "Operating Leases, Future Minimum Payments Due", "terseLabel": "Operating Leases, Future Minimum Payments Due" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments Due, Next Twelve Months", "terseLabel": "Operating Leases, Future Minimum Payments Due, Next Twelve Months" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Five Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Five Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Four Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Four Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Three Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Three Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Two Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Two Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r306", "r308" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due Thereafter", "terseLabel": "Operating Leases, Future Minimum Payments, Due Thereafter" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails", "http://www.tredegar.com/role/MaturityofLeaseLiabilityTableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesRentExpenseNet": { "auth_ref": [ "r307" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.", "label": "Operating Leases, Rent Expense, Net", "terseLabel": "Operating Leases, Rent Expense, Net" } } }, "localname": "OperatingLeasesRentExpenseNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsNoncurrent": { "auth_ref": [ "r37" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncurrent assets classified as other.", "label": "Other Assets, Noncurrent", "terseLabel": "Other assets" } } }, "localname": "OtherAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": { "auth_ref": [ "r64", "r74" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), before Reclassifications, Net of Tax", "terseLabel": "Other comprehensive income (loss) before reclassifications" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax": { "auth_ref": [ "r58" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax", "terseLabel": "Derivative financial instruments adjustment (net of tax benefit of $1,226)", "verboseLabel": "Derivative financial instruments adjustment" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax": { "auth_ref": [ "r58", "r62" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax", "terseLabel": "Derivative financial instruments adjustment, tax (benefit)" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax": { "auth_ref": [ "r56", "r301" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.", "label": "Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax", "terseLabel": "Foreign currency translation adjustment", "verboseLabel": "Foreign currency translation adjustment (net of tax benefit of $1,283)" } } }, "localname": "OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax": { "auth_ref": [ "r56", "r62" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.", "label": "Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax", "terseLabel": "Foreign currency translation adjustment, tax (benefit)" } } }, "localname": "OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r69", "r72", "r74", "r200" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 2.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), Net of Tax", "terseLabel": "Net other comprehensive income (loss) -\u00a0current period", "totalLabel": "Other comprehensive income (loss)" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Comprehensive Income (Loss), Net of Tax [Abstract]", "terseLabel": "Other Comprehensive Income (Loss), Net of Tax [Abstract]", "verboseLabel": "Other comprehensive income (loss):" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax": { "auth_ref": [ "r61", "r65", "r66", "r227" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 3.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net periodic benefit cost (credit) of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax", "terseLabel": "Amortization of prior service costs and net gains or losses", "verboseLabel": "Amortization of prior service costs and net gains or losses (net of tax of $836)" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r62", "r264" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax (expense) benefit for reclassification adjustment from accumulated other comprehensive (income) loss of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax", "terseLabel": "Amortization of prior service costs and net gains or losses, tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax": { "auth_ref": [ "r58", "r61", "r293" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax", "terseLabel": "Amount of pretax gain (loss) recognized in other comprehensive income (loss)" } } }, "localname": "OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherIncomeAndExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Income and Expenses [Abstract]", "terseLabel": "Other Income and Expenses [Abstract]" } } }, "localname": "OtherIncomeAndExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock": { "auth_ref": [ "r210", "r243" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.", "label": "Other Income and Other Expense Disclosure [Text Block]", "terseLabel": "Other Income and Other Expense Disclosure [Text Block]" } } }, "localname": "OtherIncomeAndOtherExpenseDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherInterestAndDividendIncome": { "auth_ref": [ "r334" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after discount, accretion and premium amortization, of interest income and dividend income classified as other.", "label": "Other Interest and Dividend Income", "terseLabel": "Other Interest and Dividend Income" } } }, "localname": "OtherInterestAndDividendIncome", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesNoncurrent": { "auth_ref": [ "r44" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.", "label": "Other Liabilities, Noncurrent", "terseLabel": "Other noncurrent liabilities" } } }, "localname": "OtherLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r87" ], "calculation": { "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.", "label": "Other Nonoperating Income (Expense)", "totalLabel": "Other income (expense), net", "verboseLabel": "Other income (expense), net" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/OtherIncomeExpenseNetDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherOperatingActivitiesCashFlowStatement": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example, cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).", "label": "Other Operating Activities, Cash Flow Statement", "terseLabel": "Other, net" } } }, "localname": "OtherOperatingActivitiesCashFlowStatement", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember": { "auth_ref": [ "r212", "r229", "r230", "r240" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes pension benefits.", "label": "Other Postretirement Benefits Plan [Member]", "terseLabel": "Other Post-Retirement Benefits" } } }, "localname": "OtherPostretirementBenefitPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherReceivables": { "auth_ref": [ "r52" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount due from parties in nontrade transactions, classified as other.", "label": "Other Receivables", "terseLabel": "Other Receivables" } } }, "localname": "OtherReceivables", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherRestructuringCosts": { "auth_ref": [ "r104", "r182", "r189", "r194" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.", "label": "Other Restructuring Costs", "terseLabel": "Other Restructuring Costs" } } }, "localname": "OtherRestructuringCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherRestructuringMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Restructuring and related activities classified as other.", "label": "Other Restructuring [Member]", "terseLabel": "Other Restructuring [Member]" } } }, "localname": "OtherRestructuringMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities": { "auth_ref": [ "r93" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.", "label": "Payment for Contingent Consideration Liability, Investing Activities", "negatedTerseLabel": "Payment for Contingent Consideration Liability, Investing Activities" } } }, "localname": "PaymentForContingentConsiderationLiabilityInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": { "auth_ref": [ "r90", "r94", "r117" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.", "label": "Payments for (Proceeds from) Other Investing Activities", "terseLabel": "Proceeds from the sale of assets and other" } } }, "localname": "PaymentsForProceedsFromOtherInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRestructuring": { "auth_ref": [ "r99", "r184" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.", "label": "Payments for Restructuring", "negatedTerseLabel": "Cash payments", "terseLabel": "Payments for Restructuring" } } }, "localname": "PaymentsForRestructuring", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDebtIssuanceCosts": { "auth_ref": [ "r98" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.", "label": "Payments of Debt Issuance Costs", "terseLabel": "Payments of Debt Issuance Costs" } } }, "localname": "PaymentsOfDebtIssuanceCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividendsCommonStock": { "auth_ref": [ "r96" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.", "label": "Payments of Ordinary Dividends, Common Stock", "negatedLabel": "Dividends paid" } } }, "localname": "PaymentsOfDividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation": { "auth_ref": [ "r96" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.", "label": "Payment, Tax Withholding, Share-based Payment Arrangement", "terseLabel": "Payment, Tax Withholding, Share-based Payment Arrangement" } } }, "localname": "PaymentsRelatedToTaxWithholdingForShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired": { "auth_ref": [ "r91" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.", "label": "Payments to Acquire Businesses, Net of Cash Acquired", "negatedLabel": "Acquisition, net of cash acquired" } } }, "localname": "PaymentsToAcquireBusinessesNetOfCashAcquired", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r92" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments to Acquire Property, Plant, and Equipment", "negatedLabel": "Capital expenditures" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent": { "auth_ref": [ "r16", "r213", "r214", "r215", "r219" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liability, recognized in statement of financial position, for pension, other postretirement and postemployment benefits, classified as noncurrent.", "label": "Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent", "terseLabel": "Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent" } } }, "localname": "PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitContributions": { "auth_ref": [ "r101" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow for pension and other postretirement benefits. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree.", "label": "Payment for Pension and Other Postretirement Benefits", "negatedTerseLabel": "Payment for Pension and Other Postretirement Benefits" } } }, "localname": "PensionAndOtherPostretirementBenefitContributions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost (reversal of cost) for pension and other postretirement benefits.", "label": "Pension and Other Postretirement Benefits Cost (Reversal of Cost)", "terseLabel": "Accrued pension and post-retirement benefits" } } }, "localname": "PensionAndOtherPostretirementBenefitExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": { "auth_ref": [ "r241" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for pension and other postretirement benefits.", "label": "Pension and Other Postretirement Benefits Disclosure [Text Block]", "terseLabel": "Pension And Other Post-Retirement Benefits" } } }, "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefits" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities": { "auth_ref": [ "r15", "r214", "r215", "r219" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.", "label": "Liability, Defined Benefit Plan, Current", "terseLabel": "Liability, Defined Benefit Plan, Current" } } }, "localname": "PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionContributions": { "auth_ref": [ "r101" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.", "label": "Payment for Pension Benefits", "terseLabel": "Payment for Pension Benefits" } } }, "localname": "PensionContributions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.", "label": "Pension Cost (Reversal of Cost)", "terseLabel": "Pension Cost (Reversal of Cost)" } } }, "localname": "PensionExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionPlansDefinedBenefitMember": { "auth_ref": [ "r211", "r229", "r230", "r240" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.", "label": "Pension Plan [Member]", "terseLabel": "Pension Benefits", "verboseLabel": "Pension Plan [Member]" } } }, "localname": "PensionPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PositionAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by position taken for a security.", "label": "Position [Axis]", "terseLabel": "Position [Axis]" } } }, "localname": "PositionAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PositionDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicates position taken for a security.", "label": "Position [Domain]", "terseLabel": "Position [Domain]" } } }, "localname": "PositionDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": { "auth_ref": [ "r9", "r32", "r33" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.", "label": "Prepaid Expense and Other Assets, Current", "terseLabel": "Prepaid expenses and other" } } }, "localname": "PrepaidExpenseAndOtherAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromLongTermLinesOfCredit": { "auth_ref": [ "r95" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.", "label": "Proceeds from Long-term Lines of Credit", "terseLabel": "Borrowings" } } }, "localname": "ProceedsFromLongTermLinesOfCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProductMember": { "auth_ref": [ "r203" ], "lang": { "en-US": { "role": { "documentation": "Article or substance produced by nature, labor or machinery.", "label": "Product [Member]", "terseLabel": "Product [Member]" } } }, "localname": "ProductMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ProfessionalFees": { "auth_ref": [ "r354", "r355" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.", "label": "Professional Fees", "terseLabel": "Professional Fees" } } }, "localname": "ProfessionalFees", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentDisposals": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.", "label": "Property, Plant and Equipment, Disposals", "terseLabel": "Property, Plant and Equipment, Disposals" } } }, "localname": "PropertyPlantAndEquipmentDisposals", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r35", "r173" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property, Plant and Equipment, Gross", "verboseLabel": "Property, plant and equipment, at cost" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r13", "r14", "r175", "r340" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property, Plant and Equipment, Net", "totalLabel": "Net property, plant and equipment" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReceivablesNetCurrent": { "auth_ref": [ "r20", "r26", "r339", "r353" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.", "label": "Receivables, Net, Current", "terseLabel": "Accounts and other receivables, net of allowance for doubtful accounts and sales returns of $3,165 in 2020 and $3,036 in 2019" } } }, "localname": "ReceivablesNetCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails", "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]", "terseLabel": "Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]" } } }, "localname": "ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": { "auth_ref": [ "r64", "r67", "r74" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax", "negatedLabel": "Amounts reclassified from accumulated other comprehensive income (loss)" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Axis]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Axis]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Domain]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Domain]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identifies item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Member]", "terseLabel": "Reclassification Out Of Accumulated Other Comprehensive Income", "verboseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Member]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about items reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Table]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Table]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RepaymentsOfLongTermLinesOfCredit": { "auth_ref": [ "r97" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.", "label": "Repayments of Long-term Lines of Credit", "negatedLabel": "Debt principal payments" } } }, "localname": "RepaymentsOfLongTermLinesOfCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ResearchAndDevelopmentExpense": { "auth_ref": [ "r244", "r365" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.", "label": "Research and Development Expense", "terseLabel": "Research and development" } } }, "localname": "ResearchAndDevelopmentExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedCashCurrent": { "auth_ref": [ "r7", "r12", "r110" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.", "label": "Restricted Cash, Current", "terseLabel": "Restricted Cash, Current" } } }, "localname": "RestrictedCashCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringAndRelatedCostExpectedCost1": { "auth_ref": [ "r183", "r186", "r193", "r196" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount expected to be recognized in earnings for the specified restructuring cost.", "label": "Restructuring and Related Cost, Expected Cost", "terseLabel": "Restructuring and Related Cost, Expected Cost" } } }, "localname": "RestructuringAndRelatedCostExpectedCost1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringAndRelatedCostIncurredCost": { "auth_ref": [ "r183", "r186", "r193", "r196" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.", "label": "Restructuring and Related Cost, Incurred Cost", "terseLabel": "Restructuring and Related Cost, Incurred Cost" } } }, "localname": "RestructuringAndRelatedCostIncurredCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringChargesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restructuring Charges [Abstract]", "terseLabel": "Restructuring Charges [Abstract]" } } }, "localname": "RestructuringChargesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_RestructuringChargesMember": { "auth_ref": [ "r185", "r189", "r195" ], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption in which the reported facts about restructuring charges have been included.", "label": "Restructuring Charges [Member]", "terseLabel": "Restructuring Charges [Member]" } } }, "localname": "RestructuringChargesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RestructuringCostAndReserveAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of restructuring cost.", "label": "Restructuring Type [Axis]", "terseLabel": "Restructuring Type [Axis]" } } }, "localname": "RestructuringCostAndReserveAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RestructuringCostAndReserveLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Restructuring Cost and Reserve [Line Items]", "terseLabel": "Restructuring Cost and Reserve [Line Items]" } } }, "localname": "RestructuringCostAndReserveLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RestructuringCostsAndAssetImpairmentCharges": { "auth_ref": [ "r104" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.", "label": "Restructuring Costs and Asset Impairment Charges", "terseLabel": "Restructuring Costs and Asset Impairment Charges" } } }, "localname": "RestructuringCostsAndAssetImpairmentCharges", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringReserve": { "auth_ref": [ "r184", "r191" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.", "label": "Restructuring Reserve", "periodEndLabel": "Balance at March 31, 2020", "periodStartLabel": "Balance at January 1, 2020", "terseLabel": "Restructuring Reserve" } } }, "localname": "RestructuringReserve", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringReserveAcceleratedDepreciation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan.", "label": "Restructuring and Related Cost, Accelerated Depreciation", "terseLabel": "Restructuring and Related Cost, Accelerated Depreciation" } } }, "localname": "RestructuringReserveAcceleratedDepreciation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringReserveAccrualAdjustment1": { "auth_ref": [ "r182", "r190" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.", "label": "Restructuring Reserve, Accrual Adjustment", "terseLabel": "Restructuring Reserve, Accrual Adjustment" } } }, "localname": "RestructuringReserveAccrualAdjustment1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestructuringReserveRollForward": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Restructuring Reserve [Roll Forward]", "terseLabel": "Restructuring Reserve [Roll Forward]" } } }, "localname": "RestructuringReserveRollForward", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RestructuringSettlementAndImpairmentProvisions": { "auth_ref": [ "r83" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of restructuring charges, remediation cost, and asset impairment loss.", "label": "Restructuring, Settlement and Impairment Provisions", "terseLabel": "Restructuring, Settlement and Impairment Provisions" } } }, "localname": "RestructuringSettlementAndImpairmentProvisions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r21", "r201", "r337" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings (Accumulated Deficit)", "terseLabel": "Retained earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Retained Earnings" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanFundingStatusAxis": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Information by status of funding for defined benefit plan designed to provide retirement benefits.", "label": "Retirement Plan Funding Status [Axis]", "terseLabel": "Retirement Plan Funding Status [Axis]" } } }, "localname": "RetirementPlanFundingStatusAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanFundingStatusDomain": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Status of funding for defined benefit plan designed to provide retirement benefits.", "label": "Retirement Plan Funding Status [Domain]", "terseLabel": "Retirement Plan Funding Status [Domain]" } } }, "localname": "RetirementPlanFundingStatusDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanNameAxis": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Information by name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.", "label": "Retirement Plan Name [Axis]", "terseLabel": "Retirement Plan Name [Axis]" } } }, "localname": "RetirementPlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanNameDomain": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.", "label": "Retirement Plan Name [Domain]", "terseLabel": "Retirement Plan Name [Domain]" } } }, "localname": "RetirementPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanSponsorLocationAxis": { "auth_ref": [ "r230", "r232" ], "lang": { "en-US": { "role": { "documentation": "Information by location of employer sponsoring plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Retirement Plan Sponsor Location [Axis]", "terseLabel": "Retirement Plan Sponsor Location [Axis]" } } }, "localname": "RetirementPlanSponsorLocationAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanSponsorLocationDomain": { "auth_ref": [ "r230", "r232" ], "lang": { "en-US": { "role": { "documentation": "Location of employer sponsoring plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Retirement Plan Sponsor Location [Domain]", "terseLabel": "Retirement Plan Sponsor Location [Domain]" } } }, "localname": "RetirementPlanSponsorLocationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTaxStatusAxis": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Information by tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Retirement Plan Tax Status [Axis]", "terseLabel": "Retirement Plan Tax Status [Axis]" } } }, "localname": "RetirementPlanTaxStatusAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTaxStatusDomain": { "auth_ref": [ "r230" ], "lang": { "en-US": { "role": { "documentation": "Tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Retirement Plan Tax Status [Domain]", "terseLabel": "Retirement Plan Tax Status [Domain]" } } }, "localname": "RetirementPlanTaxStatusDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r211", "r212", "r229", "r230", "r240" ], "lang": { "en-US": { "role": { "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Axis]", "terseLabel": "Retirement Plan Type [Axis]" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r211", "r212", "r229", "r230", "r240" ], "lang": { "en-US": { "role": { "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Domain]", "terseLabel": "Retirement Plan Type [Domain]" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RevenuesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Revenues [Abstract]", "terseLabel": "Revenues and other items:" } } }, "localname": "RevenuesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_RiskWeightedAssetsCalculationMethodologyAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by approach for calculating risk-weighted assets as defined by regulatory framework.", "label": "Risk-Weighted Assets Calculation Methodology [Axis]", "terseLabel": "Risk-Weighted Assets Calculation Methodology [Axis]" } } }, "localname": "RiskWeightedAssetsCalculationMethodologyAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "stringItemType" }, "us-gaap_RiskWeightedAssetsCalculationMethodologyDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Approach for calculating risk-weighted assets as defined by regulatory framework.", "label": "Risk-Weighted Assets Calculation Methodology [Domain]", "terseLabel": "Risk-Weighted Assets Calculation Methodology [Domain]" } } }, "localname": "RiskWeightedAssetsCalculationMethodologyDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "us-gaap_SalesMember": { "auth_ref": [ "r286" ], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing revenue from sale of goods and services rendered in the normal course of business.", "label": "Sales [Member]", "terseLabel": "Sales [Member]" } } }, "localname": "SalesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SalesRevenueNetMember": { "auth_ref": [ "r133" ], "lang": { "en-US": { "role": { "documentation": "Revenue from sale of product and rendering of service and other sources of income, when it serves as benchmark in concentration of risk calculation.", "label": "Revenue Benchmark [Member]", "terseLabel": "Revenue Benchmark [Member]" } } }, "localname": "SalesRevenueNetMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable": { "auth_ref": [ "r48" ], "lang": { "en-US": { "role": { "documentation": "Schedule itemizing specific types of trade accounts and notes receivable, and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.", "label": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table]", "terseLabel": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table]" } } }, "localname": "ScheduleOfAccountsNotesLoansAndFinancingReceivableTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r64" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).", "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]", "terseLabel": "Cost of goods sold", "verboseLabel": "Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of cash and cash equivalents.", "label": "Schedule of Cash and Cash Equivalents [Table Text Block]", "terseLabel": "Schedule of Cash and Cash Equivalents [Table Text Block]" } } }, "localname": "ScheduleOfCashAndCashEquivalentsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationRestrictCashReconciliationTableTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable": { "auth_ref": [ "r229", "r230", "r231", "r232", "r239" ], "lang": { "en-US": { "role": { "documentation": "Disclosures about an individual defined benefit pension plan or an other postretirement defined benefit plan. It may be appropriate to group certain similar plans. Also includes schedule for fair value of plan assets by major categories of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Schedule of Defined Benefit Plans Disclosures [Table]", "terseLabel": "Schedule of Defined Benefit Plans Disclosures [Table]" } } }, "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails", "http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r283" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the effective portion of the gains and losses on derivative instruments designated (and non-derivative instruments) designated and qualifying in cash flow hedges and net investment hedges that was recognized in other comprehensive income (loss) during the current period.", "label": "Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]", "verboseLabel": "Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges" } } }, "localname": "ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock": { "auth_ref": [ "r282" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.", "label": "Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]", "terseLabel": "Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]", "verboseLabel": "Summary Of Location And Fair Value Of Derivative Financial Instruments" } } }, "localname": "ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsTextBlock": { "auth_ref": [ "r116", "r269", "r271", "r272", "r274", "r275", "r282", "r285", "r289", "r290" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.", "label": "Schedule of Derivative Instruments [Table Text Block]", "terseLabel": "Derivative, Description of Hedged Item" } } }, "localname": "ScheduleOfDerivativeInstrumentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r130" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.", "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]", "terseLabel": "Schedule of Earnings Per Share, Basic and Diluted" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/EarningsPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r249" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]", "terseLabel": "Schedule Of Effective Income Tax Rate For Continuing Operations" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock": { "auth_ref": [ "r309" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.", "label": "Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]", "terseLabel": "Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]" } } }, "localname": "ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/LeasingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable": { "auth_ref": [ "r177" ], "lang": { "en-US": { "role": { "documentation": "For a long-lived asset to be held and used by an entity, the table may include a description of the impaired long-lived asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported.", "label": "Schedule of Impaired Long-Lived Assets Held and Used [Table]", "terseLabel": "Schedule of Impaired Long-Lived Assets Held and Used [Table]" } } }, "localname": "ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ImpairmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfInventoryCurrentTableTextBlock": { "auth_ref": [ "r11", "r29", "r30", "r31" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.", "label": "Schedule of Inventory, Current [Table Text Block]", "terseLabel": "Schedule of Inventory, Current" } } }, "localname": "ScheduleOfInventoryCurrentTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InventoriesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.", "label": "Schedule of Other Nonoperating Income (Expense) [Table Text Block]", "terseLabel": "Schedule of Other Nonoperating Income (Expense) [Table Text Block]" } } }, "localname": "ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetSummaryTableTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRestructuringAndRelatedCostsTable": { "auth_ref": [ "r187", "r188", "r192" ], "lang": { "en-US": { "role": { "documentation": "Table presenting the description of the restructuring costs, such as the expected cost; the costs incurred during the period; the cumulative costs incurred as of the balance sheet date; the income statement caption within which the restructuring charges recognized for the period are included; and the amount of and periodic changes to an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost by type of restructuring.", "label": "Schedule of Restructuring and Related Costs [Table]", "terseLabel": "Schedule of Restructuring and Related Costs [Table]" } } }, "localname": "ScheduleOfRestructuringAndRelatedCostsTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock": { "auth_ref": [ "r187", "r188", "r192" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets.", "label": "Restructuring and Related Costs [Table Text Block]", "terseLabel": "Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities" } } }, "localname": "ScheduleOfRestructuringAndRelatedCostsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": { "auth_ref": [ "r135", "r139", "r140", "r141", "r162" ], "lang": { "en-US": { "role": { "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.", "label": "Schedule of Segment Reporting Information, by Segment [Table]", "terseLabel": "Schedule of Segment Reporting Information, by Segment [Table]" } } }, "localname": "ScheduleOfSegmentReportingInformationBySegmentTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": { "auth_ref": [ "r135", "r139", "r140", "r141", "r162" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.", "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]", "terseLabel": "Schedule Of Segment Reporting Information By Segment" } } }, "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Segments [Domain]", "netLabel": "Segment [Domain]", "terseLabel": "Segments [Domain]", "verboseLabel": "Segments [Domain]" } } }, "localname": "SegmentDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SegmentReportingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Segment Reporting [Abstract]", "terseLabel": "Segment Reporting [Abstract]" } } }, "localname": "SegmentReportingAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingDisclosureTextBlock": { "auth_ref": [ "r145" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.", "label": "Segment Reporting Disclosure [Text Block]", "terseLabel": "Segment Reporting" } } }, "localname": "SegmentReportingDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReporting" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingInformationLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Segment Reporting Information [Line Items]", "terseLabel": "Segment Reporting Information [Line Items]" } } }, "localname": "SegmentReportingInformationLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SellingGeneralAndAdministrativeExpense": { "auth_ref": [ "r84", "r152" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.", "label": "Selling, General and Administrative Expense", "terseLabel": "Selling, general and administrative" } } }, "localname": "SellingGeneralAndAdministrativeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_SellingGeneralAndAdministrativeExpensesMember": { "auth_ref": [ "r88" ], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing selling, general and administrative expense.", "label": "Selling, General and Administrative Expenses [Member]", "terseLabel": "Selling, General and Administrative Expenses [Member]" } } }, "localname": "SellingGeneralAndAdministrativeExpensesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails", "http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate": { "auth_ref": [ "r323" ], "lang": { "en-US": { "role": { "documentation": "Discount rate used to estimate the fair value of servicing assets and servicing liabilities.", "label": "Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate", "terseLabel": "Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate" } } }, "localname": "ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "us-gaap_SeveranceCosts1": { "auth_ref": [ "r104", "r182", "r189", "r194" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.", "label": "Severance Costs", "terseLabel": "Pretax charges for severance and other employee-related costs", "verboseLabel": "Severance Costs" } } }, "localname": "SeveranceCosts1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShippingAndHandlingMember": { "auth_ref": [ "r203" ], "lang": { "en-US": { "role": { "documentation": "Packing and transport of product.", "label": "Shipping and Handling [Member]", "terseLabel": "Shipping and Handling [Member]" } } }, "localname": "ShippingAndHandlingMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermLeaseCommitmentAmount": { "auth_ref": [ "r317" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of short-term lease commitment.", "label": "Short-term Lease Commitment, Amount", "terseLabel": "Short-term Lease Commitment, Amount" } } }, "localname": "ShortTermLeaseCommitmentAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShortTermLeasePayments": { "auth_ref": [ "r313" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow for short-term lease payment excluded from lease liability.", "label": "Short-term Lease Payments", "terseLabel": "Operating Leases, Rent Expense" } } }, "localname": "ShortTermLeasePayments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_StatementBusinessSegmentsAxis": { "auth_ref": [ "r5", "r139", "r162", "r179", "r186", "r196", "r348" ], "lang": { "en-US": { "role": { "documentation": "Information by business segments.", "label": "Segments [Axis]", "terseLabel": "Segments [Axis]" } } }, "localname": "StatementBusinessSegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails", "http://www.tredegar.com/role/ImpairmentDetails", "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r17", "r18", "r19", "r200" ], "lang": { "en-US": { "role": { "documentation": "Information by the different classes of stock of the entity.", "label": "Class of Stock [Axis]", "terseLabel": "Class of Stock [Axis]" } } }, "localname": "StatementClassOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r46", "r200" ], "lang": { "en-US": { "role": { "documentation": "Information by component of equity.", "label": "Equity Components [Axis]", "terseLabel": "Equity Components [Axis]" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "us-gaap_StatementLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Statement [Line Items]", "terseLabel": "Statement [Line Items]" } } }, "localname": "StatementLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Cash Flows [Abstract]", "terseLabel": "Statement of Cash Flows [Abstract]" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Financial Position [Abstract]", "terseLabel": "Statement of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Comprehensive Income [Abstract]", "terseLabel": "Statement of Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Stockholders' Equity [Abstract]", "terseLabel": "Statement of Stockholders' Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.", "label": "Statement [Table]", "terseLabel": "Statement [Table]" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StockOptionPlanExpense": { "auth_ref": [ "r104" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncash expense for option under share-based payment arrangement.", "label": "Stock or Unit Option Plan Expense", "terseLabel": "Stock option-based compensation costs" } } }, "localname": "StockOptionPlanExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r19", "r22", "r23", "r149" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.", "label": "Stockholders' Equity Attributable to Parent", "periodEndLabel": "Ending Balance", "periodStartLabel": "Beginning Balance", "totalLabel": "Total shareholders\u2019 equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets", "http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Stockholders' Equity Attributable to Parent [Abstract]", "terseLabel": "Shareholders\u2019 equity:" } } }, "localname": "StockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_SubsegmentsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by business subsegments.", "label": "Subsegments [Axis]", "terseLabel": "Subsegments [Axis]" } } }, "localname": "SubsegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsegmentsConsolidationItemsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by subsegments, eliminations and reconciling items used in consolidating a reportable segment and its subsegments.", "label": "Subsegments Consolidation Items [Axis]", "terseLabel": "Subsegments Consolidation Items [Axis]" } } }, "localname": "SubsegmentsConsolidationItemsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsegmentsConsolidationItemsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Subsegments, eliminations and reconciling items used in consolidating a reportable segment and its subsegments.", "label": "Subsegments Consolidation Items [Domain]", "terseLabel": "Subsegments Consolidation Items [Domain]" } } }, "localname": "SubsegmentsConsolidationItemsDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails", "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsegmentsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Divisions of a component of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Subsegments [Domain]", "terseLabel": "Subsegments [Domain]" } } }, "localname": "SubsegmentsDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsequentEventMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event [Member]", "terseLabel": "Subsequent Event [Member]" } } }, "localname": "SubsequentEventMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsequentEventTypeAxis": { "auth_ref": [ "r320" ], "lang": { "en-US": { "role": { "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event Type [Axis]", "terseLabel": "Subsequent Event Type [Axis]" } } }, "localname": "SubsequentEventTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsequentEventTypeDomain": { "auth_ref": [ "r320" ], "lang": { "en-US": { "role": { "documentation": "Event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event Type [Domain]", "terseLabel": "Subsequent Event Type [Domain]" } } }, "localname": "SubsequentEventTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SummaryOfDerivativeInstrumentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Summary of Derivative Instruments [Abstract]", "terseLabel": "Summary of Derivative Instruments [Abstract]" } } }, "localname": "SummaryOfDerivativeInstrumentsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes": { "auth_ref": [ "r356", "r358", "r360" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate cost of investments for Federal income tax purposes.", "label": "Tax Basis of Investments, Cost for Income Tax Purposes", "terseLabel": "Total cash invested in private company" } } }, "localname": "TaxBasisOfInvestmentsCostForIncomeTaxPurposes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_TaxesPayableCurrent": { "auth_ref": [ "r39" ], "calculation": { "http://www.tredegar.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Taxes Payable, Current", "terseLabel": "Income taxes payable" } } }, "localname": "TaxesPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ThresholdPercentageOfValueDeclineInEquitySecuritiesToBeConsideredOtherThanTemporaryImpairment": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Threshold percentage by which investments in equity securities have declined in value to be considered other than temporary impairment (OTTI).", "label": "Threshold Percentage of Value Decline in Equity Securities to be considered Other than Temporary Impairment", "terseLabel": "Threshold Percentage of Value Decline in Equity Securities to be considered Other than Temporary Impairment" } } }, "localname": "ThresholdPercentageOfValueDeclineInEquitySecuritiesToBeConsideredOtherThanTemporaryImpairment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "us-gaap_TimingOfTransferOfGoodOrServiceAxis": { "auth_ref": [ "r208" ], "lang": { "en-US": { "role": { "documentation": "Information by timing of transfer of good or service to customer.", "label": "Timing of Transfer of Good or Service [Axis]", "terseLabel": "Timing of Transfer of Good or Service [Axis]" } } }, "localname": "TimingOfTransferOfGoodOrServiceAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_TimingOfTransferOfGoodOrServiceDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Timing of transfer of good or service to customer. Includes, but is not limited to, at point in time or over time.", "label": "Timing of Transfer of Good or Service [Domain]", "terseLabel": "Timing of Transfer of Good or Service [Domain]" } } }, "localname": "TimingOfTransferOfGoodOrServiceDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TypeOfRestructuringDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identification of the types of restructuring costs.", "label": "Type of Restructuring [Domain]", "terseLabel": "Type of Restructuring [Domain]" } } }, "localname": "TypeOfRestructuringDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails", "http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UnrealizedGainLossOnInvestments": { "auth_ref": [ "r104" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.", "label": "Unrealized Gain (Loss) on Investments", "negatedLabel": "Unrealized gain (loss) on investment under fair value method", "netLabel": "(Gain) loss on investment in kal\u00e9o accounted for under the fair value method", "terseLabel": "Gain (loss) on investment in kal\u00e9o accounted for under fair value method", "verboseLabel": "Unrealized gain (loss) on investment under fair value method" } } }, "localname": "UnrealizedGainLossOnInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows", "http://www.tredegar.com/role/InvestmentsNarrativeDetails1", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherNarrativeDetails", "http://www.tredegar.com/role/PlantsShutdownsAssetImpairmentsRestructuringsAndOtherScheduleOfAccruedExpensesAssociatedWithAssetImpairmentsAndExitAndDisposalActivitiesDetails", "http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions": { "auth_ref": [ "r253" ], "calculation": { "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails": { "order": 27.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.", "label": "Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions", "terseLabel": "Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount" } } }, "localname": "UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ValuationAllowanceByDeferredTaxAssetAxis": { "auth_ref": [ "r255" ], "lang": { "en-US": { "role": { "documentation": "Information by type of deferred tax consequences attributable to deductible temporary differences.", "label": "Valuation Allowance by Deferred Tax Asset [Axis]", "terseLabel": "Valuation Allowance by Deferred Tax Asset [Axis]" } } }, "localname": "ValuationAllowanceByDeferredTaxAssetAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ValuationTechniqueAxis": { "auth_ref": [ "r296" ], "lang": { "en-US": { "role": { "documentation": "Information by valuation approach and technique.", "label": "Valuation Approach and Technique [Axis]", "terseLabel": "Valuation Approach and Technique [Axis]" } } }, "localname": "ValuationTechniqueAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "stringItemType" }, "us-gaap_ValuationTechniqueDomain": { "auth_ref": [ "r296" ], "lang": { "en-US": { "role": { "documentation": "Valuation approach and technique.", "label": "Valuation Approach and Technique [Domain]", "terseLabel": "Valuation Approach and Technique [Domain]" } } }, "localname": "ValuationTechniqueDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "domainItemType" }, "us-gaap_VariableInterestEntityOwnershipPercentage": { "auth_ref": [ "r267" ], "lang": { "en-US": { "role": { "documentation": "Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).", "label": "Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage", "terseLabel": "Ownership interest percentage" } } }, "localname": "VariableInterestEntityOwnershipPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/InvestmentsNarrativeDetails1" ], "xbrltype": "percentItemType" }, "us-gaap_VariableRateAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of variable rate.", "label": "Variable Rate [Axis]", "terseLabel": "Variable Rate [Axis]" } } }, "localname": "VariableRateAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableRateDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.", "label": "Variable Rate [Domain]", "terseLabel": "Variable Rate [Domain]" } } }, "localname": "VariableRateDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r122", "r128" ], "calculation": { "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.", "label": "Weighted Average Number of Shares Outstanding, Diluted", "terseLabel": "Diluted", "totalLabel": "Shares used to compute diluted earnings per share" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r121", "r128" ], "calculation": { "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails": { "order": 2.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.", "label": "Weighted Average Number of Shares Outstanding, Basic", "terseLabel": "Basic", "verboseLabel": "Weighted average shares outstanding used to compute basic earnings per share" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.tredegar.com/role/ConsolidatedStatementsOfIncome", "http://www.tredegar.com/role/EarningsPerShareScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareDetails" ], "xbrltype": "sharesItemType" } }, "unitCount": 6 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6801-107765" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h)(1))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(1))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(n)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.12-04(a))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690" }, "r118": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "250", "URI": "http://asc.fasb.org/topic&trid=2122394" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "28A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1500-109256" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1278-109256" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258" }, "r132": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8657-108599" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599" }, "r141": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "42", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9054-108599" }, "r145": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "280", "URI": "http://asc.fasb.org/topic&trid=2134510" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4531-111522" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(20))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "30", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116846819&loc=d3e3927-108312" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 5.BB)", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.BB)", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729" }, "r157": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "330", "URI": "http://asc.fasb.org/topic&trid=2126998" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(24))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267" }, "r164": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/subtopic&trid=2144439" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "((a)(1),(b))", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r168": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(2)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226348&loc=d3e2611-110228" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228" }, "r172": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "410", "URI": "http://asc.fasb.org/extlink&oid=109237650&loc=d3e13064-110858" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "410", "URI": "http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(1)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(2)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 5.P.3)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.3)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 5.P.4(b)(2))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 5.P.4(b))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 5.P.4)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(b)(1))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(b))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(c))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(d))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14615-108349" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "20", "Subparagraph": "(SAB Topic 5.Y.Q4)", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "3B", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "610", "URI": "http://asc.fasb.org/topic&trid=49130413" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410138&loc=d3e79691-111665" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(j)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "70", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942" }, "r241": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "25", "SubTopic": "40", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109244457&loc=d3e16701-113920" }, "r243": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "720", "URI": "http://asc.fasb.org/topic&trid=2122503" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "730", "URI": "http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31917-109318" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31928-109318" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31931-109318" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31958-109318" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(4)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r257": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 11.C)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4613673-111683" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.E)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116822174&loc=d3e355146-122828" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)(ii)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(b),(c)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r282": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "4E", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "182", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=116861445&loc=SL5629052-113961" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "25", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994" }, "r295": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "815", "URI": "http://asc.fasb.org/topic&trid=2229140" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=SL116692626-108610" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32022-110900" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(b,c)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(Note 3)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(c))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164758&loc=d3e45031-112735" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918705-209980" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971" }, "r319": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(7))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=SL51823488-111719" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(d)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "940", "URI": "http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.10)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.17)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(8))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(15))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(20))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r334": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.4)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(5))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(5))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.1)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),19)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.5(c))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(11))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(c)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "210", "Subparagraph": "(b)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.6-06(3))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "220", "Subparagraph": "(k)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=118262090&loc=SL114874205-224268" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.6-07.2(a),(b),(c),(d))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=116637345&loc=SL114874292-224272" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12(8)(d))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12.Column C.3,4)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(11)(d))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C.Column C.7)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13(7)(d))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010" }, "r361": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13.Column C.6)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-14.Column E.2,3)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "310", "Subparagraph": "(SX 210.12-29(Footnote 4))", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Footnote 2))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "985", "URI": "http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756" }, "r366": { "Name": "Form 10-Q", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-13" }, "r367": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1-" }, "r368": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.17)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19,20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19-26)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r42": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.21)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.24)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.25)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.3(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.3,4)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(a)(5))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.8)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.9)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a),(b),(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i),(j),(k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "5C", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i-k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "17A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724391-108580" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(13))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868656-224227" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(10))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(14))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(21))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.13)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.2(a),(d))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.3)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.4)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.9)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r89": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585" } }, "version": "2.1" }