Cover page - shares	6 Months Ended
	Dec. 31, 2022	Jan. 31, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	1-5397
Entity Registrant Name	AUTOMATIC DATA PROCESSING, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-1467904
Entity Address, Address Line One	One ADP Boulevard
Entity Address, City or Town	Roseland,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07068
City Area Code	973
Local Phone Number	974-5000
Title of 12(b) Security	Common Stock, $0.10 Par Value(voting)
Trading Symbol	ADP
Security Exchange Name	NASDAQ
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		414,351,542
Entity Central Index Key	0000008670
Current Fiscal Year End Date	--06-30
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false