XML 12 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - shares
shares in Millions
3 Months Ended
Sep. 30, 2017
Oct. 26, 2017
Document and Entity Information    
Entity Registrant Name Lumentum Holdings Inc.  
Entity Central Index Key 0001633978  
Document Type 10-Q  
Document Period End Date Sep. 30, 2017  
Amendment Flag false  
Current Fiscal Year End Date --07-01  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   62
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1