$AVNT
AVIENT CORP Stock $avnt

$avnt Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000112297621000014 Filed on February 25, 2021

Income Statement

Concept	2020 Q4	2020	2019 Q4
Revenue	$997.0M	$17.50M	$658.6M
YoY Change	51.38%	-12.06%	-2.73%
Cost Of Revenue	$738.8M	$2.458B	$501.3M
YoY Change	47.38%	11.44%	-2.3%
Gross Profit	$252.9M	$784.3M	$153.3M
YoY Change	64.97%	19.34%	8.8%
Gross Profit Margin	25.37%	4481.71%	23.28%
Selling, General & Admin	$154.8M	$595.0M	$132.8M
YoY Change	16.57%	18.9%	19.96%
% of Gross Profit	61.21%	75.86%	86.63%
Research & Development		$59.80M
YoY Change		18.18%
% of Gross Profit		7.62%
Depreciation & Amortization	$37.00M	$111.8M	$19.10M
YoY Change	93.72%	27.77%	-13.57%
% of Gross Profit	14.63%	14.25%	12.46%
Operating Expenses	$154.8M	$654.8M	$132.8M
YoY Change	16.57%	18.84%	19.96%
Operating Profit	$65.00M	$189.3M	$20.50M
YoY Change	217.07%	20.73%	-32.12%
Interest Expense	-$19.30M	-$74.60M	-$11.90M
YoY Change	62.18%	25.38%	-23.72%
% of Operating Profit	-29.69%	-39.41%	-58.05%
Other Income/Expense, Net	$11.70M	$24.30M	$10.70M
YoY Change	9.35%	100.83%	-171.81%
Pretax Income	$57.40M	$139.0M	$19.30M
YoY Change	197.41%	27.06%	-1584.62%
Income Tax	-$17.30M	$5.200M	$12.80M
% Of Pretax Income	-30.14%	3.74%	66.32%
Net Earnings	$74.30M	$131.6M	$465.3M
YoY Change	-84.03%	-77.64%	3981.58%
Net Earnings / Revenue	7.45%	752.0%	70.65%
Basic Earnings Per Share	$0.81	$1.46	$6.05
Diluted Earnings Per Share	$0.81	$1.45	$6.00
COMMON SHARES
Basic Shares Outstanding	91.48M shares	90.10M shares
Diluted Shares Outstanding		90.60M shares

Balance Sheet

Concept	2020 Q4	2020	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$649.5M	$649.5M	$864.7M
YoY Change	-24.89%	-24.89%	405.97%
Cash & Equivalents	$649.5M	$649.5M	$864.7M
Short-Term Investments
Other Short-Term Assets	$108.5M	$108.5M	$57.70M
YoY Change	88.04%	88.04%	-13.1%
Inventory	$327.5M	$327.5M	$260.9M
Prepaid Expenses
Receivables	$516.6M	$516.6M	$330.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.602B	$1.602B	$1.513B
YoY Change	5.87%	5.87%	51.51%
LONG-TERM ASSETS
Property, Plant & Equipment	$694.9M	$775.8M	$407.4M
YoY Change	70.57%	64.64%	5.96%
Goodwill	$1.308B		$685.7M
YoY Change	90.77%		7.29%
Intangibles	$1.009B		$469.3M
YoY Change	114.89%		11.1%
Long-Term Investments
YoY Change
Other Assets	$176.0M	$176.0M	$133.8M
YoY Change	31.54%	31.54%	-13.12%
Total Long-Term Assets	$3.268B	$3.268B	$1.760B
YoY Change	85.7%	85.7%	2.06%
TOTAL ASSETS
Total Short-Term Assets	$1.602B	$1.602B	$1.513B
Total Long-Term Assets	$3.268B	$3.268B	$1.760B
Total Assets	$4.871B	$4.871B	$3.273B
YoY Change	48.79%	48.79%	20.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$471.7M	$471.7M	$287.7M
YoY Change	63.96%	63.96%	-5.67%
Accrued Expenses	$285.6M	$257.9M	$375.4M
YoY Change	-23.92%	-34.94%	191.69%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$18.60M	$18.60M	$18.40M
YoY Change	1.09%	1.09%	-5.15%
Total Short-Term Liabilities	$801.0M	$801.0M	$702.5M
YoY Change	14.02%	14.02%	25.99%
LONG-TERM LIABILITIES
Long-Term Debt	$1.854B	$1.854B	$1.211B
YoY Change	53.11%	53.11%	-9.38%
Other Long-Term Liabilities	$192.8M	$363.8M	$144.3M
YoY Change	33.61%	49.28%	-11.04%
Total Long-Term Liabilities	$2.358B	$2.218B	$1.518B
YoY Change	55.31%	52.47%	-6.58%
TOTAL LIABILITIES
Total Short-Term Liabilities	$801.0M	$801.0M	$702.5M
Total Long-Term Liabilities	$2.358B	$2.218B	$1.518B
Total Liabilities	$3.159B	$3.173B	$2.221B
YoY Change	42.25%	42.86%	1.74%
SHAREHOLDERS EQUITY
Retained Earnings	$1.057B		$1.001B
YoY Change	5.61%		111.71%
Common Stock	$1.200M		$1.200M
YoY Change	0.0%		0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$901.2M		$1.043B
YoY Change	-13.6%		2.4%
Treasury Stock Shares	30.90M shares		45.30M shares
Shareholders Equity	$1.697B	$1.697B	$1.052B
YoY Change
Total Liabilities & Shareholders Equity	$4.871B	$4.871B	$3.273B
YoY Change	48.79%	48.79%	20.2%

Cashflow Statement

Concept	2020 Q4	2020	2019 Q4
OPERATING ACTIVITIES
Net Income	$74.30M	$131.6M	$465.3M
YoY Change	-84.03%	-77.64%	3981.58%
Depreciation, Depletion And Amortization	$37.00M	$111.8M	$19.10M
YoY Change	93.72%	27.77%	-13.57%
Cash From Operating Activities	$152.9M	$221.6M	$102.2M
YoY Change	49.61%	-26.33%	23.43%
INVESTING ACTIVITIES
Capital Expenditures	-$25.10M	$63.70M	-$33.80M
YoY Change	-25.74%	-22.03%	36.29%
Acquisitions		$1.380B
YoY Change		1054.01%
Other Investing Activities	-$37.50M	-$5.200M	$807.9M
YoY Change	-104.64%	-89.88%	201875.0%
Cash From Investing Activities	-$62.60M	-$1.432B	$774.1M
YoY Change	-108.09%	-333.96%	-3272.54%
FINANCING ACTIVITIES
Cash Dividend Paid		$71.30M
YoY Change		18.24%
Common Stock Issuance & Retirement, Net		-$473.7M
YoY Change		-1860.97%
Debt Paid & Issued, Net		$6.500M
YoY Change		0.0%
Cash From Financing Activities	-29.50M	$982.0M	-212.5M
YoY Change	-86.12%	-549.84%	226.42%
NET CHANGE
Cash From Operating Activities	152.9M	$221.6M	102.2M
Cash From Investing Activities	-62.60M	-$1.432B	774.1M
Cash From Financing Activities	-29.50M	$982.0M	-212.5M
Net Change In Cash	60.80M	-$215.2M	663.8M
YoY Change	-90.84%	-131.02%	-10007.46%
FREE CASH FLOW
Cash From Operating Activities	$152.9M	$221.6M	$102.2M
Capital Expenditures	-$25.10M	$63.70M	-$33.80M
Free Cash Flow	$178.0M	$157.9M	$136.0M
YoY Change	30.88%	-27.93%	26.39%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001122976
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	City Area Code CityAreaCode	440
CY2020	dei	Local Phone Number LocalPhoneNumber	930-1000
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-16091
CY2020	dei	Entity Registrant Name EntityRegistrantName	Avient Corp
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OH
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	34-1730488
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	33587 Walker Road,
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Avon Lake
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	44012
CY2020	dei	Security12b Title Security12bTitle	Common Shares, par value $.01 per share
CY2020	dei	Trading Symbol TradingSymbol	AVNT
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	2400000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	91293388	shares
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3242100000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2862700000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2881000000.0	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2457800000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2205500000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2256200000	USD
CY2020	us-gaap	Gross Profit GrossProfit	784300000	USD
CY2019	us-gaap	Gross Profit GrossProfit	657200000	USD
CY2018	us-gaap	Gross Profit GrossProfit	624800000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	595000000.0	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	500400000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	446200000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	189300000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	156800000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	178600000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-74600000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-59500000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-62800000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1100000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	24300000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	12100000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-12900000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	139000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	109400000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	101800000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33700000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14400000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	133800000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	75700000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	87400000	USD
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-400000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	513100000	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	72100000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	133400000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	588800000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	159500000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1800000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-300000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	131600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	588600000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	159800000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.47
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.98
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.10
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
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CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.46
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.62
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.01
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.46
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.97
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.09
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	6.61
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.90
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.45
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.58
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.99
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	90100000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	77200000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79700000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	500000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	500000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	700000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90600000	shares
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CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	80400000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	800000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	600000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.820
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.788
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.720
CY2020	us-gaap	Profit Loss ProfitLoss	133400000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	588800000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	159500000	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	2200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-27600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-2500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1300000	USD
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CY2020	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	109000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-300000	USD
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CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	242400000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	588500000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	130200000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1800000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	200000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-300000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	240600000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	588300000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	130500000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	649500000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	864700000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	516600000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	330000000.0	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	327500000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	260900000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	108500000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	57700000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1602100000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	1513300000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	694900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	407400000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1308100000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	685700000	USD
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CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	80900000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	63800000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	176000000.0	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	133800000	USD
CY2020Q4	us-gaap	Assets Assets	4870500000	USD
CY2019Q4	us-gaap	Assets Assets	3273300000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	18600000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	18400000	USD
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CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	287700000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	25100000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	21000000.0	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	285600000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	375400000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	801000000.0	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	702500000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1854000000.0	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1210900000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	115000000.0	USD
CY2019Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	56600000	USD
CY2019Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1518100000	USD
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	140000000.0	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	63500000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	56000000.0	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	42800000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	192800000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	144300000	USD
CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	2357800000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000.0	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000.0	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122200000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122200000	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	1200000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	1200000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1043100000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1513300000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1175200000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1057400000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1001200000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	30900000	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	45300000	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	901200000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	26400000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-82600000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1697100000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1051900000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	14600000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	800000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1711700000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1052700000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	88500000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	3200000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	USD
CY2018	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	3000000.0	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4870500000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3273300000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	133400000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	588800000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	159500000	USD
CY2020	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2019	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	457700000	USD
CY2018	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111800000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	87500000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1700000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3200000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4800000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1100000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	11300000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	11600000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	10900000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4600000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-29700000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	11300000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-40200000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-40200000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	10600000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	78400000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-22700000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7900000	USD
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	30700000	USD
CY2019	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-19700000	USD
CY2018	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	4800000	USD
CY2020	avnt	Increase Decrease In Contingent Consideration IncreaseDecreaseInContingentConsideration	1000000.0	USD
CY2019	avnt	Increase Decrease In Contingent Consideration IncreaseDecreaseInContingentConsideration	36400000	USD
CY2018	avnt	Increase Decrease In Contingent Consideration IncreaseDecreaseInContingentConsideration	700000	USD
CY2020	avnt	Increase Decrease In Accrued Liabilities And Other Assets IncreaseDecreaseInAccruedLiabilitiesAndOtherAssets	-2000000.0	USD
CY2019	avnt	Increase Decrease In Accrued Liabilities And Other Assets IncreaseDecreaseInAccruedLiabilitiesAndOtherAssets	9900000	USD
CY2018	avnt	Increase Decrease In Accrued Liabilities And Other Assets IncreaseDecreaseInAccruedLiabilitiesAndOtherAssets	4000000.0	USD
CY2020	avnt	Payment Of Taxes On Gain On Divestiture PaymentOfTaxesOnGainOnDivestiture	142000000.0	USD
CY2019	avnt	Payment Of Taxes On Gain On Divestiture PaymentOfTaxesOnGainOnDivestiture	0	USD
CY2018	avnt	Payment Of Taxes On Gain On Divestiture PaymentOfTaxesOnGainOnDivestiture	0	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	38100000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	221600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	300800000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	253700000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	63700000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	81700000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	76000000.0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1380200000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	119600000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	98600000	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	7100000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	761800000	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2020	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	5200000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	51400000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	4300000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1431600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	611900000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-170300000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	650000000.0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	963400000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1152900000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1083900000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1090300000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	22400000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	26900000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	123000000.0	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	71300000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	60300000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	56100000	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1800000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	16400000	USD
CY2020	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	7800000	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	6500000	USD
CY2018	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	6500000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2300000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2100000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4100000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	9500000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	200000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4600000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	496100000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	50800000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	982000000.0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-218300000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-148100000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12800000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-600000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-8000000.0	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-215200000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	693800000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-72700000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	864700000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	170900000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	243600000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	649500000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	864700000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	170900000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	599400000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	159500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29300000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	57500000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	123000000.0	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	8000000.0	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	16500000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	540600000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	588800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-300000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	60300000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	26900000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	10800000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1052700000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	133400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	109000000.0	USD
CY2020	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	800000	USD
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	75100000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	22400000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	496100000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6300000	USD
CY2020	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	12500000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1711700000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.820
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.788
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.720
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions in certain circumstances that affect amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from these estimates.</span></div>
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	22500000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	18200000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	50600000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	49600000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-25600000	USD
CY2018	avnt	Other Comprehensive Income Loss Net Investment Hedge And Cash Flow Hedge Gain Loss OtherComprehensiveIncomeLossNetInvestmentHedgeAndCashFlowHedgeGainLoss	-3300000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-400000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-6900000	USD
CY2019	avnt	Other Comprehensive Income Loss Net Investment Hedge And Cash Flow Hedge Gain Loss OtherComprehensiveIncomeLossNetInvestmentHedgeAndCashFlowHedgeGainLoss	6600000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	110600000	USD
CY2020	avnt	Other Comprehensive Income Loss Net Investment Hedge And Cash Flow Hedge Gain Loss OtherComprehensiveIncomeLossNetInvestmentHedgeAndCashFlowHedgeGainLoss	-1600000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	59800000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	640500000	USD
	us-gaap	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual	32700000	USD
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	1000000.0	USD
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	36400000	USD
CY2020	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	0	USD
CY2019	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	9400000	USD
CY2018	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	15900000	USD
CY2020	us-gaap	Capital Expenditure Discontinued Operations CapitalExpenditureDiscontinuedOperations	0	USD
CY2019	us-gaap	Capital Expenditure Discontinued Operations CapitalExpenditureDiscontinuedOperations	14100000	USD
CY2018	us-gaap	Capital Expenditure Discontinued Operations CapitalExpenditureDiscontinuedOperations	19500000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	639100000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	47900000	USD
CY2019	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-1300000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	685700000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	569000000.0	USD
CY2020	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	53400000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1308100000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	1168100000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	212200000	USD
CY2020Q4	avnt	Finite Lived Intangible Assets Currency Translation FiniteLivedIntangibleAssetsCurrencyTranslation	-52600000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1008500000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	640300000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	168700000	USD
CY2019Q4	avnt	Finite Lived Intangible Assets Currency Translation FiniteLivedIntangibleAssetsCurrencyTranslation	2300000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	469300000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	43500000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29500000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	25500000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	56400000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	54300000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	52000000.0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	51900000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	51600000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	19600000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1891900000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	19300000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1872600000	USD
CY2020Q4	avnt	Long Term Debt Current Maturities Principal Amount LongTermDebtCurrentMaturitiesPrincipalAmount	18600000	USD
CY2020Q4	avnt	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Current DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsCurrent	0	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	18600000	USD
CY2020Q4	avnt	Long Term Debt Excluding Current Maturities Principal Amount LongTermDebtExcludingCurrentMaturitiesPrincipalAmount	1873300000	USD
CY2020Q4	avnt	Debt Instrument Unamortized Discount Premiumand Debt Issuance Costs Noncurrent DebtInstrumentUnamortizedDiscountPremiumandDebtIssuanceCostsNoncurrent	19300000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1854000000.0	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1242800000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	13500000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1229300000	USD
CY2019Q4	avnt	Long Term Debt Current Maturities Principal Amount LongTermDebtCurrentMaturitiesPrincipalAmount	18400000	USD
CY2019Q4	avnt	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Current DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsCurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	18400000	USD
CY2019Q4	avnt	Long Term Debt Excluding Current Maturities Principal Amount LongTermDebtExcludingCurrentMaturitiesPrincipalAmount	1224400000	USD
CY2019Q4	avnt	Debt Instrument Unamortized Discount Premiumand Debt Issuance Costs Noncurrent DebtInstrumentUnamortizedDiscountPremiumandDebtIssuanceCostsNoncurrent	13500000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1210900000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	6500000	USD
CY2020Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1955900000	USD
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1271800000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1872600000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1229300000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	18600000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	8500000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	608700000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	8600000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	658700000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	588800000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1891900000	USD
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	19900000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11000000.0	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	3100000	USD
CY2020	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	70800000	USD
CY2019	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	67000000.0	USD
CY2018	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	61000000.0	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	31000000.0	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	24000000.0	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y4M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	10500000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11300000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.039
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.079
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	28000000.0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	16000000.0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	21400000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	15000000.0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	8700000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4700000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	13300000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	91100000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	10000000.0	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	81100000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	24000000.0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	11300000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	8100000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4500000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	7800000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	71700000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	7900000	USD
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	8000000.0	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	63800000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	171700000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	157600000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	16600000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	139200000	USD
CY2019Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	95300000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	327500000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	260900000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1377400000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1013500000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	682500000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	606100000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	694900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	407400000	USD
CY2020	us-gaap	Depreciation Depreciation	68200000	USD
CY2019	us-gaap	Depreciation Depreciation	48600000	USD
CY2018	us-gaap	Depreciation Depreciation	47100000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	192800000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	144300000	USD
CY2020Q4	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	-17200000	USD
CY2019Q4	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	9600000	USD
CY2018Q4	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	15600000	USD
CY2020	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	17200000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0319
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0295
CY2020	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	17200000	USD
CY2020	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	1100000	USD
CY2019	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	9600000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0411
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0319
CY2018	avnt	Remeasurement Gain Loss Net On Pension Plans RemeasurementGainLossNetOnPensionPlans	15600000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0362
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0411
CY2020Q4	avnt	Defined Benefit Plan Plan Assets Not Transferred Plan Receivable DefinedBenefitPlanPlanAssetsNotTransferredPlanReceivable	16800000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	112000000.0	USD
CY2020	avnt	Defined Contribution Plan Employer Matching Contributions DefinedContributionPlanEmployerMatchingContributions	9900000	USD
CY2019	avnt	Defined Contribution Plan Employer Matching Contributions DefinedContributionPlanEmployerMatchingContributions	10400000	USD
CY2018	avnt	Defined Contribution Plan Employer Matching Contributions DefinedContributionPlanEmployerMatchingContributions	10100000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	600000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	10500000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	10400000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	10100000	USD
CY2020Q1	avnt	Accrual For Environmental Loss Contingencies Number Of Companies Negotiating Consent Decree AccrualForEnvironmentalLossContingenciesNumberOfCompaniesNegotiatingConsentDecree	3	company
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	119700000	USD
CY2020	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	12700000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	10300000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	112000000.0	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	111900000	USD
CY2017Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	114800000	USD
CY2020	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	20400000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	10200000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	23100000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	26000000.0	USD
CY2020	us-gaap	Accrual For Environmental Loss Contingencies Foreign Currency Translation Gain Loss AccrualForEnvironmentalLossContingenciesForeignCurrencyTranslationGainLoss	0	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Foreign Currency Translation Gain Loss AccrualForEnvironmentalLossContingenciesForeignCurrencyTranslationGainLoss	200000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Foreign Currency Translation Gain Loss AccrualForEnvironmentalLossContingenciesForeignCurrencyTranslationGainLoss	0	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	119700000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	139000000.0	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	112000000.0	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	111900000	USD
CY2020	us-gaap	Insurance Recoveries InsuranceRecoveries	8700000	USD
CY2019	us-gaap	Insurance Recoveries InsuranceRecoveries	4500000	USD
CY2018	us-gaap	Insurance Recoveries InsuranceRecoveries	4300000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	19600000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	41200000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	4100000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	119400000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	68200000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	97700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	109400000	USD
CY2019	avnt	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income And Fdii Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAndFDIIPercent	-0.001
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	22000000.0	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6900000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	46700000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	21600000	USD
CY2020	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	17200000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	101800000	USD
CY2020	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	-25800000	USD
CY2019	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	24800000	USD
CY2018	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	-400000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	32700000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	21900000	USD
CY2019	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-12500000	USD
CY2018	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	11100000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-18900000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-500000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-18300000	USD
CY2020	avnt	Deferred Income Expensefrom Continuing Operations DeferredIncomeExpensefromContinuingOperations	-1700000	USD
CY2019	avnt	Deferred Income Expensefrom Continuing Operations DeferredIncomeExpensefromContinuingOperations	-13000000.0	USD
CY2018	avnt	Deferred Income Expensefrom Continuing Operations DeferredIncomeExpensefromContinuingOperations	-7200000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33700000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14400000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.027
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.089
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.121
CY2020	avnt	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income And Fdii Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAndFDIIPercent	0.031
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.060
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	-0.033
CY2018	avnt	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income And Fdii Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAndFDIIPercent	0.029
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.020
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.016
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.094
CY2020	avnt	Effective Income Tax Rate Reconciliation Nondeductible Expense Contingent Consideration Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseContingentConsiderationPercent	0.018
CY2019	avnt	Effective Income Tax Rate Reconciliation Nondeductible Expense Contingent Consideration Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseContingentConsiderationPercent	0.028
CY2018	avnt	Effective Income Tax Rate Reconciliation Nondeductible Expense Contingent Consideration Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseContingentConsiderationPercent	0.002
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.021
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.028
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.008
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.011
CY2020	avnt	Effective Income Tax Rate Reconciliation Investments In Foreign Subsidiaries Percent EffectiveIncomeTaxRateReconciliationInvestmentsInForeignSubsidiariesPercent	-0.131
CY2019	avnt	Effective Income Tax Rate Reconciliation Investments In Foreign Subsidiaries Percent EffectiveIncomeTaxRateReconciliationInvestmentsInForeignSubsidiariesPercent	0
CY2018	avnt	Effective Income Tax Rate Reconciliation Investments In Foreign Subsidiaries Percent EffectiveIncomeTaxRateReconciliationInvestmentsInForeignSubsidiariesPercent	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.034
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.042
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023
CY2020	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsPercent	-0.052
CY2019	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsPercent	0.075
CY2018	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsPercent	-0.016
CY2020	avnt	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsPercent	0.010
CY2019	avnt	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsPercent	-0.024
CY2018	avnt	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsPercent	-0.006
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.005
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.017
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.034
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.008
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.012
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.037
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.308
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.141
CY2020	avnt	Effective Income Tax Rate Reconciliation Investments In Foreign Subsidiaries Tax Benefit Amount EffectiveIncomeTaxRateReconciliationInvestmentsInForeignSubsidiariesTaxBenefitAmount	18200000	USD
CY2020	avnt	Effective Income Tax Rate Reconciliation Investments In Foreign Subsidiaries Percent EffectiveIncomeTaxRateReconciliationInvestmentsInForeignSubsidiariesPercent	-0.131
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4700000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.034
CY2020	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Favorable Amount EffectiveIncomeTaxRateReconciliationForeignPermanentItemsFavorableAmount	7200000	USD
CY2020	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Favorable Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsFavorablePercent	0.052
CY2019	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Unfavorable Amount EffectiveIncomeTaxRateReconciliationForeignPermanentItemsUnfavorableAmount	10300000	USD
CY2019	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Unfavorable Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsUnfavorablePercent	0.094
CY2019	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Favorable Amount EffectiveIncomeTaxRateReconciliationForeignPermanentItemsFavorableAmount	2000000.0	USD
CY2019	avnt	Effective Income Tax Rate Reconciliation Foreign Permanent Items Favorable Percent EffectiveIncomeTaxRateReconciliationForeignPermanentItemsFavorablePercent	0.019
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	24900000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	25900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	20500000	USD
CY2020Q4	avnt	Deferred Tax Assets Environmental DeferredTaxAssetsEnvironmental	29700000	USD
CY2019Q4	avnt	Deferred Tax Assets Environmental DeferredTaxAssetsEnvironmental	27900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	55600000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	45300000	USD
CY2020Q4	avnt	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Operating Lease Liability DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOperatingLeaseLiability	16600000	USD
CY2019Q4	avnt	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Operating Lease Liability DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOperatingLeaseLiability	18000000.0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	43900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	40100000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	170700000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	151800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	20700000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	16200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	150000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	135600000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	47600000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	144900000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	95100000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	17000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	18000000.0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2400000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	9200000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	211900000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	148200000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	61900000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	12600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	38600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	208300000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	4500000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	0	USD
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	456000000	USD
CY2020Q4	avnt	Deferred Tax Liabilities Repatriation Of Foreign Earnings DeferredTaxLiabilitiesRepatriationOfForeignEarnings	9200000	USD
CY2019Q4	avnt	Deferred Tax Liabilities Repatriation Of Foreign Earnings DeferredTaxLiabilitiesRepatriationOfForeignEarnings	6700000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	188800000	USD
CY2020	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	9900000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	45700000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	40500000	USD
CY2019	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	20000000.0	USD
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	29900000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11200000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16400000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17800000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	600000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1100000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1300000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	600000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	400000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1100000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	700000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2600000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	500000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5000000.0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	200000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2800000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	500000	USD
CY2020	avnt	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	-400000	USD
CY2019	avnt	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	1000000.0	USD
CY2018	avnt	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	500000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9500000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11200000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1400000	USD
CY2020	avnt	Unrecognized Tax Benefits Reasonably Possible Reduction Resulting From Lapse Of Applicable Statuteof Limitations And Outcome Of Tax Examinations UnrecognizedTaxBenefitsReasonablyPossibleReductionResultingFromLapseOfApplicableStatuteofLimitationsAndOutcomeOfTaxExaminations	1700000	USD
CY2020	avnt	Unrecognized Tax Benefits Income Tax Expense Impact If Recognized UnrecognizedTaxBenefitsIncomeTaxExpenseImpactIfRecognized	8700000	USD
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2500000	shares
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11300000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11600000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10200000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	avnt	Number Of Gradesof Resins Soldby Company Distribution NumberOfGradesofResinsSoldbyCompanyDistribution	4000	grade_resin
CY2020	avnt	Company Distribution Numberof Customers CompanyDistributionNumberofCustomers	6500	injection_molder_extruder
CY2020	avnt	Number Of Suppliers Representedby Company Distribution NumberOfSuppliersRepresentedbyCompanyDistribution	25	supplier
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3242100000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3242100000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	189300000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2862700000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2862700000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	156800000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2881000000.0	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2881000000.0	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	178600000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3242100000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2862700000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2881000000.0	USD
CY2020Q4	us-gaap	Assets Assets	4870500000	USD
CY2019Q4	us-gaap	Assets Assets	3273300000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	694900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	407400000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	997000000.0	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	924500000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	609100000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	711500000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	658600000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	168100000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	65000000.0	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	705300000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	748200000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	750600000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	252900000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	210200000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	149700000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	171500000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	153300000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	160500000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	175300000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	33500000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	38000000.0	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	52800000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	20500000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	1700000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	23000000.0	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	43100000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	46100000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	47100000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	74700000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	2600000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	23400000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	33100000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	6400000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	23600000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	23200000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	22500000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	74200000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	33100000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	6400000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	23500000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	23200000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	22400000	USD
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	100000	USD
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-200000	USD
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-300000	USD
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	458900000	USD
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	19500000	USD
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	18900000	USD
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	15800000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	74300000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1700000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	22800000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	32800000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	465300000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	43000000.0	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	42100000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	38200000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.81
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.02
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.25
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.38
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.08
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.31
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.30
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.29
CY2020Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.81
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.02
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.25
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.38
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.08
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.30
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.30
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.29
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	5.97
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.25
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.24
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.20
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	5.92
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.25
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.24
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.20
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.02
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.05
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.81
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.02
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.00
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49

Files In Submission

Name	View Source	Status
0001122976-21-000014-index-headers.html	Edgar Link	pending
0001122976-21-000014-index.html	Edgar Link	pending
0001122976-21-000014.txt	Edgar Link	pending
0001122976-21-000014-xbrl.zip	Edgar Link	pending
avientlogo1.jpg	Edgar Link	pending
avnt-20201231.htm	Edgar Link	pending
avnt-20201231.xsd	Edgar Link	pending
avnt-20201231_cal.xml	Edgar Link	unprocessable
avnt-20201231_def.xml	Edgar Link	unprocessable
avnt-20201231_htm.xml	Edgar Link	completed
avnt-20201231_lab.xml	Edgar Link	unprocessable
avnt-20201231_pre.xml	Edgar Link	unprocessable
avnt-ex1016_20201231.htm	Edgar Link	pending
avnt-ex1025_20201231.htm	Edgar Link	pending
avnt-ex211_20201231.htm	Edgar Link	pending
avnt-ex231_20201231.htm	Edgar Link	pending
avnt-ex311_20201231.htm	Edgar Link	pending
avnt-ex312_20201231.htm	Edgar Link	pending
avnt-ex31_20201231.htm	Edgar Link	pending
avnt-ex321_20201231.htm	Edgar Link	pending
avnt-ex322_20201231.htm	Edgar Link	pending
avnt-ex32_20201231.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
sig1.jpg	Edgar Link	pending

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$AVNT
AVIENT CORP Stock $avnt

2020 Q4 Form 10-K Financial Statement

#000112297621000014 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVNT AVIENT CORP Stock $avnt

2020 Q4 Form 10-K Financial Statement

#000112297621000014 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVNT
AVIENT CORP Stock $avnt