v3.19.3
Document and Entity Information - USD ($)
shares in Millions, $ in Billions
12 Months Ended
Sep. 28, 2019
Nov. 22, 2019
Mar. 29, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Sep. 28, 2019    
Current Fiscal Year End Date --09-28    
Document Transition Report false    
Entity Registrant Name BERRY GLOBAL GROUP, INC.    
Entity Incorporation, State or Country Code DE    
Entity File Number 001-35672    
Entity Tax Identification Number 20-5234618    
Entity Address, Address Line One 101 Oakley Street    
Entity Address, Address Line Two PO BOX 959    
Entity Address, City or Town Evansville    
Entity Address, State or Province IN    
Entity Address, Postal Zip Code 47710    
City Area Code 812    
Local Phone Number 424-2904    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Small Business false    
Entity Public Float     $ 7.1
Entity Common Stock, Shares Outstanding   132.3  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001378992    
Document Annual Report true    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol BERY    
Security Exchange Name NYSE