Cover Page - shares	6 Months Ended
	Nov. 27, 2021	Jan. 01, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Nov. 27, 2021
Document Transition Report	false
Entity File Number	001-15141
Entity Registrant Name	MillerKnoll, Inc.
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-0837640
Entity Address, Address Line One	855 East Main Avenue
Entity Address, City or Town	Zeeland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49464
City Area Code	616
Local Phone Number	654-3000
Title of 12(b) Security	Common Stock, par value $0.20 per share
Trading Symbol	MLKN
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		75,744,162
Entity Central Index Key	0000066382
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--05-28