Name:	ap_ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation
Namespace Prefix:	ap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Liability for total costs, including defense costs, for asbestos liability claims pending or projected through 2020.

No definition available.

Name:	ap_LiabilityForAsbestosClaims
Namespace Prefix:	ap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

Percentage attributable to settlement costs for unasserted claims projected to be filed through two thousand twenty and future defense costs.

No definition available.

Name:	ap_PercentageAttributableToSettlementCostsForUnassertedClaimsProjectedToBeFiledThroughTwoThousandTwentyAndFutureDefenseCosts
Namespace Prefix:	ap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Carrying amount as of the balance sheet date of amounts expected to be recovered under the terms of insurance contracts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Name:	us-gaap_EstimatedInsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The total number of new claims filed pertaining to a loss contingency during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.