COVER - shares	9 Months Ended
	Apr. 02, 2022	Apr. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 02, 2022
Document Transition Report	false
Entity File Number	001-36861
Entity Registrant Name	Lumentum Holdings Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-3108385
Entity Address, Address Line One	1001 Ridder Park Drive
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	546-5483
Title of 12(b) Security	Common Stock, par value of $0.001 per share
Trading Symbol	LITE
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		69,000,000.0
Entity Central Index Key	0001633978
Amendment Flag	false
Current Fiscal Year End Date	--07-02
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3