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Customer Related Liabilities - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2025
Noncurrent Liability [Member]
Other Liabilities Disclosure [Line Items]
Performance obligation related to customer deposits expected satisfaction period	1 year
Maximum [Member]
Other Liabilities Disclosure [Line Items]
Performance obligation related to customer deposits expected satisfaction period	1 year

X

- Definition

Other liabilities disclosure.

+ References

No definition available.

+ Details

Name:	ap_OtherLiabilitiesDisclosureLineItems
Namespace Prefix:	ap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Performance obligation related to customer deposits expected satisfaction period.

+ References

No definition available.

+ Details

Name:	ap_PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod
Namespace Prefix:	ap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=ap_NoncurrentLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: