Pensions And Other Postretirement Benefits (Reconciliation Of Changes In Plans' Benefit Obligations, Assets And Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions	$ 19	$ 13	$ 29
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	77	28
Service cost	2	2	1
Interest cost	1	1	1
Plan Amendments	(6)	4
Actuarial (gain) loss	4	6
Benefits paid	(4)	(4)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	13
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	0	27
Benefit obligation at end of year	74	77	28
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	4	4
Benefits paid	(4)	(4)
Defined Benefit Plan, Plan Assets, Business Combination	0	0
Defined Benefit Plan, Plan Assets, (Increase) Decrease for Settlement	0	0
Fair value of plan assets at end of year	0	0	0
Funded status	(74)	(77)
Defined Benefit Plan, Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	1,478	1,392
Service cost	0	0	0
Interest cost	14	56	55
Plan Amendments	0	0
Actuarial (gain) loss	0	154
Benefits paid	(38)	(77)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	2
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(1,423)	(49)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	0	0
Benefit obligation at end of year	31	1,478	1,392
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	1,477	1,450
Actual return on plan assets	(14)	146
Employer contributions	7	1
Benefits paid	(38)	(77)
Defined Benefit Plan, Plan Assets, Business Combination	0	2
Defined Benefit Plan, Plan Assets, (Increase) Decrease for Settlement	(1,397)	(45)
Fair value of plan assets at end of year	35	1,477	1,450
Funded status	4	(1)
Defined Benefit Plan, Funded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	0	0
Defined Benefit Plan, Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	239	220
Service cost	0	1	7
Interest cost	8	9	8
Plan Amendments	0	0
Actuarial (gain) loss	5	17
Benefits paid	(14)	(12)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	4
Benefit obligation at end of year	238	239	220
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	12	12
Benefits paid	(12)	(12)
Defined Benefit Plan, Plan Assets, Business Combination	0	0
Defined Benefit Plan, Plan Assets, (Increase) Decrease for Settlement	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status	$ (238)	$ (239)