Basis of Presentation (Policies)	9 Months Ended
	Jul. 03, 2021
Basis of Presentation [Abstract]
Basis of Presentation	The accompanying unaudited Condensed Consolidated Financial Statements of Berry Global Group, Inc. (“the Company,” “we,” or “Berry”) have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) pursuant to the rules and regulations of the Securities and Exchange Commission for interim reporting.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements.
Use of Estimates	In preparing financial statements in conformity with GAAP, we must make estimates and assumptions that affect the reported amounts and disclosures at the date of the financial statements and during the reporting period.  Actual results could differ from those estimates.
Reclassifications	The extra week in fiscal 2021 occurred in the first quarter.  In October 2020, the Company reorganized portions of its four operating segments in order to better align our various businesses for future growth.  The Company has recast all prior period amounts to conform to this new reporting structure.