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Supplier Finance Programs - Narrative (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Period of termination	30 days
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration]	Accounts payable	Accounts payable

X

- Definition

Supplier Finance Program, Period Of Termination

+ References

No definition available.

+ Details

Name:	asix_SupplierFinanceProgramPeriodOfTermination
Namespace Prefix:	asix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indicates line item in statement of financial position that includes obligation for supplier finance program.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479468/405-50-50-3

+ Details

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