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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount of increase (decrease) in other comprehensive income, after tax, from changes classified as other.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Name:	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Total Penske Automotive Group Stockholders' Equity	Voting and Non-voting Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interest
Beginning balance (in shares) at Dec. 31, 2024			66,774,651
Beginning balance at Dec. 31, 2024	$ 5,418.5	$ 5,401.0	$ 0.0	$ 9.1	$ 5,756.4	$ (364.5)	$ 17.5
Increase (decrease) in stockholders' equity
Equity compensation (in shares)			144,590
Equity compensation	8.0	8.0		8.0
Repurchases of common stock (in shares)			(255,228)
Repurchases of common stock	(40.5)	(40.5)		(17.1)	(23.4)
Dividends	(81.8)	(81.8)			(81.8)
PMG distributions to partners	(7.0)	(7.0)			(7.0)
Distributions to non-controlling interest	(0.3)						(0.3)
Foreign currency translation	55.3	55.2				55.2	0.1
Other	(0.3)	(0.3)				(0.3)
Net income	258.4	257.7			257.7		0.7
Ending balance (in shares) at Mar. 31, 2025			66,664,013
Ending balance at Mar. 31, 2025	$ 5,610.3	5,592.3	$ 0.0	0.0	5,901.9	(309.6)	18.0
Beginning balance (in shares) at Dec. 31, 2025	65,760,464		65,760,464
Beginning balance at Dec. 31, 2025	$ 5,580.9	5,562.4			5,750.1	(187.7)	18.5
Increase (decrease) in stockholders' equity
Equity compensation (in shares)			159,184
Equity compensation	8.1	8.1		8.1
Repurchases of common stock (in shares)			(170,393)
Repurchases of common stock	(26.9)	(26.9)		(8.1)	(18.8)
Dividends	(92.6)	(92.6)			(92.6)
Foreign currency translation	(13.5)	(13.4)					(0.1)
Other	(8.4)	(8.4)				(8.4)	0.0
Net income	$ 234.9	234.5			234.5		0.4
Ending balance (in shares) at Mar. 31, 2026	65,749,255		65,749,255
Ending balance at Mar. 31, 2026	$ 5,682.2	$ 5,663.7	$ 0.0	$ 0.0	$ 5,873.2	$ (209.5)	$ 18.5