Retirement Plans - Change in Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 24, 2021	Sep. 25, 2020
Change in benefit obligation:
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Amounts recognized on the Consolidated Balance Sheets:
Other assets	$ 903	$ 783
Long-term pension and postretirement liabilities	(695)	(1,139)
Non-U.S. Plans
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	2,520	2,519
Service cost	38	48	$ 52
Interest cost	32	30	25
Actuarial (gains) losses	(660)	6
Benefits and administrative expenses paid	(82)	(85)
Settlements and Curtailments	(10)	(67)
Currency translation	(353)	63
Other	17	6
Benefit obligation at end of fiscal year	1,502	2,520	2,519
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	1,582	1,537
Actual return on plan assets	(320)	81
Employer contributions	40	43
Benefits and administrative expenses paid	(82)	(85)
Settlements	(10)	(52)
Currency translation	(235)	54
Other	14	4
Fair value of plan assets at end of fiscal year	989	1,582	1,537
Funded status	(513)	(938)
Amounts recognized on the Consolidated Balance Sheets:
Other assets	92	102
Accrued and other current liabilities	(25)	(30)
Long-term pension and postretirement liabilities	(580)	(1,010)
Net amount recognized	(513)	(938)
Pre-tax amounts included in accumulated other comprehensive income (loss) which have not yet been recognized in net periodic benefit cost:
Net actuarial loss	(176)	(547)
Prior service (cost) credit	16	26
Total	$ (160)	$ (521)
Weighted-average assumptions used to determine pension benefit obligation at fiscal year end:
Discount rate (as a percent)	3.80%	1.37%
Rate of compensation increase (as a percent)	2.62%	2.53%
U.S. Plans
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	$ 952	$ 1,219
Service cost	8	12	10
Interest cost	26	30	36
Actuarial (gains) losses	(204)	(46)
Benefits and administrative expenses paid	(65)	(80)
Settlements and Curtailments		(183)
Benefit obligation at end of fiscal year	717	952	1,219
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	833	968
Actual return on plan assets	(158)	110
Employer contributions	2	18
Benefits and administrative expenses paid	(65)	(80)
Settlements		(183)
Fair value of plan assets at end of fiscal year	612	833	$ 968
Funded status	(105)	(119)
Amounts recognized on the Consolidated Balance Sheets:
Accrued and other current liabilities	(4)	(4)
Long-term pension and postretirement liabilities	(101)	(115)
Net amount recognized	(105)	(119)
Pre-tax amounts included in accumulated other comprehensive income (loss) which have not yet been recognized in net periodic benefit cost:
Net actuarial loss	(149)	(151)
Prior service (cost) credit	(1)	(1)
Total	$ (150)	$ (152)
Weighted-average assumptions used to determine pension benefit obligation at fiscal year end:
Discount rate (as a percent)	5.53%	2.84%