Name:	pcar_FinanceReceivablesMinimumPaymentsDueAfterYearFive
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of minimum rental payments due in the fifth fiscal year following the latest fiscal year on finance receivables.

No definition available.

Name:	pcar_FinanceReceivablesMinimumPaymentsDueInYearFive
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum rental payments due in the fourth fiscal year following the latest fiscal year on finance receivables.

No definition available.

Name:	pcar_FinanceReceivablesMinimumPaymentsDueInYearFour
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum rental payments due in the third fiscal year following the latest fiscal year on finance receivables.

No definition available.

Name:	pcar_FinanceReceivablesMinimumPaymentsDueInYearThree
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum rental payments due in the second fiscal year following the latest fiscal year on finance receivables.

No definition available.

Name:	pcar_FinanceReceivablesMinimumPaymentsDueInYearTwo
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum rental payments due in the next fiscal year following the latest fiscal year on finance receivables.

No definition available.

Name:	pcar_FinanceReceivablesMinimumPaymentsDueWithinOneYear
Namespace Prefix:	pcar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Subparagraph 3

-Article 9