Debt Instrument, Annual Principal Payment, Percent of Aggregate Principal

No definition available.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

+ References

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-Paragraph 2
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate amount of interest expense on all borrowings.

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

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-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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+ Details

Name:	us-gaap_ProceedsFromDebtNetOfIssuanceCosts
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

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+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

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Period Type:	duration

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Name:	us-gaap_BusinessAcquisitionAxis=avnt_APMAcquisitionMember
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Period Type:

- Details

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- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=avnt_CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Data Type:	na
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Period Type:

- Details

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Period Type:

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Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=avnt_RevolvingCreditFacilityDue2026Member
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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FINANCING ARRANGEMENTS - Narrative (Details) - USD ($)					12 Months Ended
FINANCING ARRANGEMENTS - Narrative (Details) - USD ($)	Dec. 02, 2022	Nov. 02, 2022	Aug. 29, 2022	Aug. 10, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 01, 2022
Debt Instrument [Line Items]
Prepaying the debt		$ 150,000,000
Write-off of unamortized issuance costs and discounts associated within Interest expense					$ 9,600,000
Fair value of debt instruments					2,153,100,000	$ 1,917,700,000
Borrowings					2,178,900,000	1,858,900,000
Interest income					34,000,000	17,500,000	$ 19,900,000
Total interest paid on debt					69,400,000	72,600,000	$ 61,100,000
APM Acquisition
Debt Instrument [Line Items]
Commitment fees					$ 10,000,000
Senior Notes
Debt Instrument [Line Items]
Prepaying the debt	$ 200,000,000
Annual principal payment percentage					1.00%
7.125% senior notes due 2030 \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal				$ 725,000,000
Proceeds from notes offering, net of issuance costs				$ 715,900,000
Interest rate, stated percentage				7.125%				7.125%
Credit Agreement
Debt Instrument [Line Items]
Aggregate principal			$ 575,000,000
Proceeds from notes offering, net of issuance costs			$ 537,600,000
Credit Agreement \| Base Rate
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate			2.25%
Credit Agreement \| SOFR
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate			3.25%
Senior secured term loan due 2029 \| Secured Debt
Debt Instrument [Line Items]
Borrowings					$ 385,500,000
Senior secured term loan due 2029 \| Secured Debt \| Base Rate
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate			2.06%
Senior secured term loan due 2029 \| Secured Debt \| SOFR
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate			3.06%
5.25% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		5.25%
Prepaying the debt		$ 600,000,000
Redemption price equal percentage		101.00%
Redemption premium					6,000,000
Write-off of unamortized issuance costs and discounts associated within Interest expense					400,000
Senior Secured Revolving Credit Facility due 2022 \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings outstanding					0
Borrowings					0	$ 0
Senior Secured Revolving Credit Facility due 2022 \| Line of Credit
Debt Instrument [Line Items]
Remaining availability on credit line					246,200,000
Senior Secured Revolving Credit Facility due 2022 \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 500,000,000