Pensions And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost For Pension And Postretirement Benefit Plans Recognized In The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Other Nonoperating Income (Expense)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 2	$ 1	$ 2
Defined Benefit Plan, Interest Cost	1	1	1
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0
Amortization of prior service credit	5	4	(2)
Defined Benefit Plan, Amortization of Gain (Loss)	(5)	(8)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	(34)
Net Periodic Benefit Cost (Credit), Excluding Service Cost	3	(2)	(33)
Defined Benefit Plan, Funded Plan \| Qualified Plan \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	1	1	0
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1)	(1)	0
Amortization of prior service credit	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0
Net Periodic Benefit Cost (Credit), Excluding Service Cost	0	0	0
Defined Benefit Plan, Unfunded Plan \| Nonqualified Plan \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	8	6	6
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0
Amortization of prior service credit	1	1	1
Defined Benefit Plan, Amortization of Gain (Loss)	(3)	3	4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0
Net Periodic Benefit Cost (Credit), Excluding Service Cost	$ 6	$ 10	$ 11

Pensions And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost For Pension And Postretirement Benefit Plans Recognized In The Consolidated Statements Of Income) (Details) - USD ($)
$ in Millions

12 Months Ended

Sep. 30, 2023

Oct. 01, 2022

Oct. 02, 2021

Defined Benefit Plan Disclosure [Line Items]

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Other Nonoperating Income (Expense)

Other Postretirement Benefits Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Defined Benefit Plan, Service Cost

$ 2

$ 1