Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Apr. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 3	$ 3	$ 6	$ 7
Interest cost		16	18	32	38
Expected return on plan assets		(14)	(16)	(29)	(33)
Amortization of net actuarial loss		2	2	4	3
Settlement (gain) loss	[1]	2	0	2	(12)
Net periodic cost (credit)		9	7	15	3
Defined Benefit Plan, Settlements, Plan Assets				5	265
Other Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost		1	1	1	2
Amortization of net actuarial loss		0	(9)	0	(9)
Amortization of prior service credit		(6)	(5)	(12)	(9)
Net periodic cost (credit)		$ (5)	$ (13)	$ (11)	$ (16)

[1] We made lump-sum settlement payments using plan assets of $5 million and $265 million for the six months ended April 1, 2017 and April 2, 2016, respectively, to certain deferred vested participants within our qualified pension plans.