XML 79 R73.htm IDEA: XBRL DOCUMENT
v3.25.3

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract] |  |
Settlement charge, pre-tax | $ 350.0 | $ 600.0
Settlement charge, after-tax | $ 264.5 | $ 446.4

X
- Definition Litigation settlement expense after tax. + References No definition available. + Details
Name: | pcar_LitigationSettlementExpenseAfterTax
Namespace Prefix: | pcar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(6)) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_LitigationSettlementExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration