Retirement Plans - Defined Benefit Pension Plan Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 24, 2021	Sep. 25, 2020
Other (income) expense:
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)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement and Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Non-U.S. Plans
Operating expense:
Service cost	$ 38	$ 48	$ 52
Other (income) expense:
Interest cost	32	30	25
Expected return on plan assets	(55)	(57)	(61)
Amortization of net actuarial loss	24	32	41
Amortization of prior service credit and other	(5)	(6)	(6)
Settlements and curtailment loss (gain)	(3)	(2)
Net periodic pension benefit cost (credit)	$ 31	$ 45	$ 51
Weighted average assumptions used to determine net postretirement benefit cost (credit) during the fiscal year:
Discount rate (as a percent)	1.37%	1.13%	1.01%
Expected return on plan assets (as a percent)	3.77%	3.65%	4.07%
Rate of compensation increase (as a percent)	2.53%	2.50%	2.53%
U.S. Plans
Operating expense:
Service cost	$ 8	$ 12	$ 10
Other (income) expense:
Interest cost	26	30	36
Expected return on plan assets	(47)	(52)	(59)
Amortization of net actuarial loss	3	9	9
Settlements and curtailment loss (gain)		28
Net periodic pension benefit cost (credit)	$ (10)	$ 27	$ (4)
Weighted average assumptions used to determine net postretirement benefit cost (credit) during the fiscal year:
Discount rate (as a percent)	2.84%	2.57%	3.14%
Expected return on plan assets (as a percent)	5.90%	5.60%	6.50%