Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Subsequent Events (Details) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
Subsequent Events (Details) $ in Millions	Oct. 31, 2020 USD ($) Segment	Sep. 26, 2020 USD ($)	Jun. 27, 2020 USD ($)	Mar. 28, 2020 USD ($)	Dec. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 29, 2018 USD ($)
U.S Flexible Packaging Converting Disposition [Abstract]
Net sales		$ 3,008	$ 2,910	$ 2,975	$ 2,816	$ 3,019	$ 1,937	$ 1,950	$ 1,972	$ 11,709	$ 8,878	$ 7,869
Assets held for sale		162				0				162	0
Liabilities held for sale		25				$ 0				25	$ 0
U.S. Flexible Packaging Converting Business [Member] \| Held for Sale [Member]
U.S Flexible Packaging Converting Disposition [Abstract]
Net sales										200
Assets held for sale		162								162
Liabilities held for sale		$ 25								$ 25
Subsequent Event [Member]
Business Reorganization [Abstract]
Number of operating segments \| Segment	4
Subsequent Event [Member] \| U.S. Flexible Packaging Converting Business [Member] \| Held for Sale [Member]
U.S Flexible Packaging Converting Disposition [Abstract]
Sales price	$ 140