Segment And Geographic Data (Summary Of Selected Information By Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Oct. 01, 2016	Sep. 26, 2015	Sep. 27, 2014
Segment Reporting Information [Line Items]
Net sales	$ 1,618	$ 1,645	$ 1,614	$ 1,612	$ 1,196	$ 1,241	$ 1,224	$ 1,220	$ 6,489	$ 4,881	$ 4,958
Total operating income									581	408	316
Total depreciation and amortization									525	350	358
Consumer Packaging [Member]
Segment Reporting Information [Line Items]
Net sales									2,768	2,870	2,904
Total operating income									225	229	164
Total depreciation and amortization									260	237	239
Health, Hygiene, & Specialities [Member]
Segment Reporting Information [Line Items]
Net sales									2,259	502	450
Total operating income									169	31	20
Total depreciation and amortization									192	35	31
Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales									1,462	1,509	1,604
Total operating income									187	148	132
Total depreciation and amortization									$ 73	$ 78	$ 88