Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 04, 2020
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	1-12297
Entity Registrant Name	Penske Automotive Group, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-3086739
Entity Address, Address Line One	2555 Telegraph Road
Entity Address, City or Town	Bloomfield Hills
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48302-0954
City Area Code	248
Local Phone Number	648-2500
Title of 12(b) Security	Common Stock
Trading Symbol	PAG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		80,461,102
Entity Central Index Key	0001019849
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1