Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Sep. 26, 2015
Consolidated Statements of Income [Abstract]
Net sales	$ 1,881	$ 1,906	$ 1,806	$ 1,502	$ 1,618	$ 1,645	$ 1,614	$ 1,612	$ 7,095	$ 6,489	$ 4,881
Costs and expenses:
Cost of goods sold	1,514	1,518	1,453	1,206	1,317	1,296	1,269	1,320	5,691	5,202	4,012
Selling, general and administrative									494	531	357
Amortization of intangibles									154	143	91
Restructuring and impairment charges									24	32	13
Operating income									732	581	408
Debt extinguishment									10	4	94
Other (income) expense, net									4	(22)	1
Interest expense, net									269	291	191
Income before income taxes									449	308	122
Income tax expense									109	72	36
Net income (loss)	$ 110	$ 107	$ 72	$ 51	$ 77	$ 96	$ 59	$ 4	$ 340	$ 236	$ 86
Net income per share:
Basic (see footnote 14) (in dollars per share)	$ 0.84	$ 0.82	$ 0.56	$ 0.42	$ 0.63	$ 0.79	$ 0.49	$ 0.03	$ 2.66	$ 1.95	$ 0.72
Diluted (see footnote 14) (in dollars per share)	$ 0.81	$ 0.79	$ 0.54	$ 0.40	$ 0.61	$ 0.76	$ 0.47	$ 0.03	$ 2.56	$ 1.89	$ 0.70