3.20.2 html 574 396 1 false 106 0 false 7 false false R1.htm 0001001 - Document - Document and Entity Information Sheet http://www.pqcorp.com/role/DocumentandEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001002 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME Sheet http://www.pqcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFINCOME CONDENSED CONSOLIDATED STATEMENTS OF INCOME Statements 2 false false R3.htm 1002003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://www.pqcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statements 3 false false R4.htm 1003004 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://www.pqcorp.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS CONDENSED CONSOLIDATED BALANCE SHEETS Statements 4 false false R5.htm 1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS??? EQUITY Sheet http://www.pqcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS??? EQUITY Statements 5 false false R6.htm 1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.pqcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 6 false false R7.htm 2101101 - Disclosure - Background and Basis of Presentation Sheet http://www.pqcorp.com/role/BackgroundandBasisofPresentation Background and Basis of Presentation Notes 7 false false R8.htm 2104102 - Disclosure - New Accounting Standards Sheet http://www.pqcorp.com/role/NewAccountingStandards New Accounting Standards Notes 8 false false R9.htm 2105103 - Disclosure - Revenue from Contracts with Customers Sheet http://www.pqcorp.com/role/RevenuefromContractswithCustomers Revenue from Contracts with Customers Notes 9 false false R10.htm 2109104 - Disclosure - Fair Value Measurements Sheet http://www.pqcorp.com/role/FairValueMeasurements Fair Value Measurements Notes 10 false false R11.htm 2112105 - Disclosure - Stockholders' Equity Sheet http://www.pqcorp.com/role/StockholdersEquity Stockholders' Equity Notes 11 false false R12.htm 2118106 - Disclosure - Asset Swap Transaction Sheet http://www.pqcorp.com/role/AssetSwapTransaction Asset Swap Transaction Notes 12 false false R13.htm 2121107 - Disclosure - Sale of Product Lines Sheet http://www.pqcorp.com/role/SaleofProductLines Sale of Product Lines Notes 13 false false R14.htm 2123108 - Disclosure - Goodwill Sheet http://www.pqcorp.com/role/Goodwill Goodwill Notes 14 false false R15.htm 2126109 - Disclosure - Other Operating Expense, Net Sheet http://www.pqcorp.com/role/OtherOperatingExpenseNet Other Operating Expense, Net Notes 15 false false R16.htm 2129110 - Disclosure - Inventories, Net Sheet http://www.pqcorp.com/role/InventoriesNet Inventories, Net Notes 16 false false R17.htm 2132111 - Disclosure - Investments in Affiliated Companies Sheet http://www.pqcorp.com/role/InvestmentsinAffiliatedCompanies Investments in Affiliated Companies Notes 17 false false R18.htm 2137112 - Disclosure - Property, Plant and Equipment Sheet http://www.pqcorp.com/role/PropertyPlantandEquipment Property, Plant and Equipment Notes 18 false false R19.htm 2141113 - Disclosure - Long-term Debt Sheet http://www.pqcorp.com/role/LongtermDebt Long-term Debt Notes 19 false false R20.htm 2145114 - Disclosure - Financial Instruments Sheet http://www.pqcorp.com/role/FinancialInstruments Financial Instruments Notes 20 false false R21.htm 2152115 - Disclosure - Income Taxes Sheet http://www.pqcorp.com/role/IncomeTaxes Income Taxes Notes 21 false false R22.htm 2154116 - Disclosure - Benefit Plans Sheet http://www.pqcorp.com/role/BenefitPlans Benefit Plans Notes 22 false false R23.htm 2157117 - Disclosure - Commitments and Contingent Liabilities Sheet http://www.pqcorp.com/role/CommitmentsandContingentLiabilities Commitments and Contingent Liabilities Notes 23 false false R24.htm 2158118 - Disclosure - Reportable Segments Sheet http://www.pqcorp.com/role/ReportableSegments Reportable Segments Notes 24 false false R25.htm 2162119 - Disclosure - Stock-Based Compensation Sheet http://www.pqcorp.com/role/StockBasedCompensation Stock-Based Compensation Notes 25 false false R26.htm 2167120 - Disclosure - Earnings per Share Sheet http://www.pqcorp.com/role/EarningsperShare Earnings per Share Notes 26 false false R27.htm 2172121 - Disclosure - Supplemental Cash Flow Information Sheet http://www.pqcorp.com/role/SupplementalCashFlowInformation Supplemental Cash Flow Information Notes 27 false false R28.htm 2176122 - Disclosure - Subsequent Events Sheet http://www.pqcorp.com/role/SubsequentEvents Subsequent Events Notes 28 false false R29.htm 2202201 - Disclosure - Background and Basis of Presentation (Policies) Sheet http://www.pqcorp.com/role/BackgroundandBasisofPresentationPolicies Background and Basis of Presentation (Policies) Policies http://www.pqcorp.com/role/NewAccountingStandards 29 false false R30.htm 2306301 - Disclosure - Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables) Sheet http://www.pqcorp.com/role/RevenuefromContractswithCustomersRevenuefromContractswithCustomersTables Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables) Tables 30 false false R31.htm 2310302 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.pqcorp.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.pqcorp.com/role/FairValueMeasurements 31 false false R32.htm 2313303 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.pqcorp.com/role/StockholdersEquityTables Stockholders' Equity (Tables) Tables http://www.pqcorp.com/role/StockholdersEquity 32 false false R33.htm 2319304 - Disclosure - Asset Swap Transaction (Tables) Sheet http://www.pqcorp.com/role/AssetSwapTransactionTables Asset Swap Transaction (Tables) Tables http://www.pqcorp.com/role/AssetSwapTransaction 33 false false R34.htm 2324305 - Disclosure - Goodwill (Tables) Sheet http://www.pqcorp.com/role/GoodwillTables Goodwill (Tables) Tables http://www.pqcorp.com/role/Goodwill 34 false false R35.htm 2327306 - Disclosure - Other Operating Expense, Net (Tables) Sheet http://www.pqcorp.com/role/OtherOperatingExpenseNetTables Other Operating Expense, Net (Tables) Tables http://www.pqcorp.com/role/OtherOperatingExpenseNet 35 false false R36.htm 2330307 - Disclosure - Inventories (Tables) Sheet http://www.pqcorp.com/role/InventoriesTables Inventories (Tables) Tables http://www.pqcorp.com/role/InventoriesNet 36 false false R37.htm 2333308 - Disclosure - Investments in Affiliated Companies (Tables) Sheet http://www.pqcorp.com/role/InvestmentsinAffiliatedCompaniesTables Investments in Affiliated Companies (Tables) Tables http://www.pqcorp.com/role/InvestmentsinAffiliatedCompanies 37 false false R38.htm 2338309 - Disclosure - Property, Plant and Equipment (Tables) Sheet http://www.pqcorp.com/role/PropertyPlantandEquipmentTables Property, Plant and Equipment (Tables) Tables http://www.pqcorp.com/role/PropertyPlantandEquipment 38 false false R39.htm 2342310 - Disclosure - Long-term Debt (Tables) Sheet http://www.pqcorp.com/role/LongtermDebtTables Long-term Debt (Tables) Tables http://www.pqcorp.com/role/LongtermDebt 39 false false R40.htm 2346311 - Disclosure - Financial Instruments (Tables) Sheet http://www.pqcorp.com/role/FinancialInstrumentsTables Financial Instruments (Tables) Tables http://www.pqcorp.com/role/FinancialInstruments 40 false false R41.htm 2355312 - Disclosure - Benefit Plans (Tables) Sheet http://www.pqcorp.com/role/BenefitPlansTables Benefit Plans (Tables) Tables http://www.pqcorp.com/role/BenefitPlans 41 false false R42.htm 2359313 - Disclosure - Reportable Segments (Tables) Sheet http://www.pqcorp.com/role/ReportableSegmentsTables Reportable Segments (Tables) Tables http://www.pqcorp.com/role/ReportableSegments 42 false false R43.htm 2363314 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.pqcorp.com/role/StockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.pqcorp.com/role/StockBasedCompensation 43 false false R44.htm 2368315 - Disclosure - Earnings per Share (Tables) Sheet http://www.pqcorp.com/role/EarningsperShareTables Earnings per Share (Tables) Tables http://www.pqcorp.com/role/EarningsperShare 44 false false R45.htm 2373316 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.pqcorp.com/role/SupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.pqcorp.com/role/SupplementalCashFlowInformation 45 false false R46.htm 2403401 - Disclosure - Background and Basis of Presentation (Details) Sheet http://www.pqcorp.com/role/BackgroundandBasisofPresentationDetails Background and Basis of Presentation (Details) Details http://www.pqcorp.com/role/BackgroundandBasisofPresentationPolicies 46 false false R47.htm 2407402 - Disclosure - Disaggregated Revenue (Details) Sheet http://www.pqcorp.com/role/DisaggregatedRevenueDetails Disaggregated Revenue (Details) Details 47 false false R48.htm 2408403 - Disclosure - Contract Assets and Liabilities (Details) Sheet http://www.pqcorp.com/role/ContractAssetsandLiabilitiesDetails Contract Assets and Liabilities (Details) Details 48 false false R49.htm 2411404 - Disclosure - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.pqcorp.com/role/AssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 49 false false R50.htm 2414405 - Disclosure - Pre-tax and After-tax Components of Other Comprehensive Income (Loss) (Details) Sheet http://www.pqcorp.com/role/PretaxandAftertaxComponentsofOtherComprehensiveIncomeLossDetails Pre-tax and After-tax Components of Other Comprehensive Income (Loss) (Details) Details 50 false false R51.htm 2415406 - Disclosure - Change by Component (Details) Sheet http://www.pqcorp.com/role/ChangebyComponentDetails Change by Component (Details) Details 51 false false R52.htm 2416407 - Disclosure - Reclassifications out of AOCI (Details) Sheet http://www.pqcorp.com/role/ReclassificationsoutofAOCIDetails Reclassifications out of AOCI (Details) Details 52 false false R53.htm 2417408 - Disclosure - Stock Repurchase Program (Details) Sheet http://www.pqcorp.com/role/StockRepurchaseProgramDetails Stock Repurchase Program (Details) Details 53 false false R54.htm 2420409 - Disclosure - Asset Swap Transaction (Details) Sheet http://www.pqcorp.com/role/AssetSwapTransactionDetails Asset Swap Transaction (Details) Details http://www.pqcorp.com/role/AssetSwapTransactionTables 54 false false R55.htm 2422410 - Disclosure - Sale of Product Lines (Details) Sheet http://www.pqcorp.com/role/SaleofProductLinesDetails Sale of Product Lines (Details) Details http://www.pqcorp.com/role/SaleofProductLines 55 false false R56.htm 2425411 - Disclosure - Goodwill (Details) Sheet http://www.pqcorp.com/role/GoodwillDetails Goodwill (Details) Details http://www.pqcorp.com/role/GoodwillTables 56 false false R57.htm 2428412 - Disclosure - Other Operating Expense, Net (Details) Sheet http://www.pqcorp.com/role/OtherOperatingExpenseNetDetails Other Operating Expense, Net (Details) Details http://www.pqcorp.com/role/OtherOperatingExpenseNetTables 57 false false R58.htm 2431413 - Disclosure - Inventories (Details) Sheet http://www.pqcorp.com/role/InventoriesDetails Inventories (Details) Details http://www.pqcorp.com/role/InventoriesTables 58 false false R59.htm 2434414 - Disclosure - Ownership Percentage (Details) Sheet http://www.pqcorp.com/role/OwnershipPercentageDetails Ownership Percentage (Details) Details 59 false false R60.htm 2435415 - Disclosure - Summarized Income Statement (Details) Sheet http://www.pqcorp.com/role/SummarizedIncomeStatementDetails Summarized Income Statement (Details) Details 60 false false R61.htm 2436416 - Disclosure - Investments in Affiliated Companies Narrative (Details) Sheet http://www.pqcorp.com/role/InvestmentsinAffiliatedCompaniesNarrativeDetails Investments in Affiliated Companies Narrative (Details) Details 61 false false R62.htm 2439417 - Disclosure - Property, Plant and Equipment (Details) Sheet http://www.pqcorp.com/role/PropertyPlantandEquipmentDetails Property, Plant and Equipment (Details) Details http://www.pqcorp.com/role/PropertyPlantandEquipmentTables 62 false false R63.htm 2440418 - Disclosure - Property, Plant and Equipment Narrative (Details) Sheet http://www.pqcorp.com/role/PropertyPlantandEquipmentNarrativeDetails Property, Plant and Equipment Narrative (Details) Details 63 false false R64.htm 2443419 - Disclosure - Long-term Debt (Details) Sheet http://www.pqcorp.com/role/LongtermDebtDetails Long-term Debt (Details) Details http://www.pqcorp.com/role/LongtermDebtTables 64 false false R65.htm 2444420 - Disclosure - Long-term Debt Narrative (Details) Sheet http://www.pqcorp.com/role/LongtermDebtNarrativeDetails Long-term Debt Narrative (Details) Details 65 false false R66.htm 2447421 - Disclosure - Financial Instruments Narrative (Details) Sheet http://www.pqcorp.com/role/FinancialInstrumentsNarrativeDetails Financial Instruments Narrative (Details) Details 66 false false R67.htm 2448422 - Disclosure - Fair Value (Details) Sheet http://www.pqcorp.com/role/FairValueDetails Fair Value (Details) Details http://www.pqcorp.com/role/FairValueMeasurementsTables 67 false false R68.htm 2449423 - Disclosure - Effect on Other Comprehensive Income (Details) Sheet http://www.pqcorp.com/role/EffectonOtherComprehensiveIncomeDetails Effect on Other Comprehensive Income (Details) Details 68 false false R69.htm 2450424 - Disclosure - Cash Flow Hedge Impact on Income Statement (Details) Sheet http://www.pqcorp.com/role/CashFlowHedgeImpactonIncomeStatementDetails Cash Flow Hedge Impact on Income Statement (Details) Details 69 false false R70.htm 2451425 - Disclosure - Net Investment Hedge Impact on AOCI (Details) Sheet http://www.pqcorp.com/role/NetInvestmentHedgeImpactonAOCIDetails Net Investment Hedge Impact on AOCI (Details) Details 70 false false R71.htm 2453426 - Disclosure - Income Taxes (Details) Sheet http://www.pqcorp.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.pqcorp.com/role/IncomeTaxes 71 false false R72.htm 2456427 - Disclosure - Net Periodic Pension Expense Benefit (Details) Sheet http://www.pqcorp.com/role/NetPeriodicPensionExpenseBenefitDetails Net Periodic Pension Expense Benefit (Details) Details 72 false false R73.htm 2460428 - Disclosure - Summary Financial Information by Reportable Segment (Details) Sheet http://www.pqcorp.com/role/SummaryFinancialInformationbyReportableSegmentDetails Summary Financial Information by Reportable Segment (Details) Details 73 false false R74.htm 2461429 - Disclosure - Reconciliation of Net Income to Segment Adjusted EBITDA (Details) Sheet http://www.pqcorp.com/role/ReconciliationofNetIncometoSegmentAdjustedEBITDADetails Reconciliation of Net Income to Segment Adjusted EBITDA (Details) Details 74 false false R75.htm 2464430 - Disclosure - Stock-Based Compensation Narrative (Details) Sheet http://www.pqcorp.com/role/StockBasedCompensationNarrativeDetails Stock-Based Compensation Narrative (Details) Details 75 false false R76.htm 2465431 - Disclosure - Performance Stock Units Assumptions and Methodology (Details) Sheet http://www.pqcorp.com/role/PerformanceStockUnitsAssumptionsandMethodologyDetails Performance Stock Units Assumptions and Methodology (Details) Details 76 false false R77.htm 2466432 - Disclosure - Schedule of RSU and PSU Activity (Details) Sheet http://www.pqcorp.com/role/ScheduleofRSUandPSUActivityDetails Schedule of RSU and PSU Activity (Details) Details 77 false false R78.htm 2469433 - Disclosure - Reconciliation from Basic to Diluted Weighted Average Shares Outstanding (Details) Sheet http://www.pqcorp.com/role/ReconciliationfromBasictoDilutedWeightedAverageSharesOutstandingDetails Reconciliation from Basic to Diluted Weighted Average Shares Outstanding (Details) Details 78 false false R79.htm 2470434 - Disclosure - Calculation of Basic and Diluted Earnings per Share (Details) Sheet http://www.pqcorp.com/role/CalculationofBasicandDilutedEarningsperShareDetails Calculation of Basic and Diluted Earnings per Share (Details) Details 79 false false R80.htm 2471435 - Disclosure - Anti-dilutive Shares (Details) Sheet http://www.pqcorp.com/role/AntidilutiveSharesDetails Anti-dilutive Shares (Details) Details 80 false false R81.htm 2474436 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.pqcorp.com/role/SupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.pqcorp.com/role/SupplementalCashFlowInformationTables 81 false false R82.htm 2475437 - Disclosure - Cash and Restricted Cash Reconciliation (Details) Sheet http://www.pqcorp.com/role/CashandRestrictedCashReconciliationDetails Cash and Restricted Cash Reconciliation (Details) Details 82 false false R83.htm 2477438 - Disclosure - Subsequent Events (Details) Sheet http://www.pqcorp.com/role/SubsequentEventsDetails Subsequent Events (Details) Details http://www.pqcorp.com/role/SubsequentEvents 83 false false All Reports Book All Reports pqg-20200930.htm ex311-sec302ceocertx09.htm ex312-sec302cfocertx09.htm ex321-sec906ceocertx09.htm ex322-sec906cfocertx09.htm pqg-20200930.xsd pqg-20200930_cal.xml pqg-20200930_def.xml pqg-20200930_lab.xml pqg-20200930_pre.xml http://fasb.org/srt/2020-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/us-gaap/2020-01-31 http://xbrl.sec.gov/country/2020-01-31 true true