Organization and Summary of Significant Accounting Policies - Penske Transportation Solutions (Details)	12 Months Ended
Dec. 31, 2025
Penske Truck Leasing Co LP \| Penske Corporation
Summary Of Significant Accounting Policies [Line Items]
Ownership interest in Penske Truck Leasing Company	41.10%
Penske Truck Leasing Co LP \| Mitsui and Co
Summary Of Significant Accounting Policies [Line Items]
Ownership interest in Penske Truck Leasing Company	30.00%
Penske Truck Leasing Co LP
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage	28.90%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant