Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023
Net Periodic Postretirement Benefit Cost
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)	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)	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)	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)	Other Nonoperating Income (Expense)
Non-U.S. Plans
Net Periodic Postretirement Benefit Cost
Service cost	$ 7	$ 6	$ 14	$ 13
Interest cost	15	14	30	28
Expected returns on plan assets	(13)	(11)	(25)	(22)
Amortization of net actuarial loss	1	2	2	3
Amortization of prior service credit	(1)	(1)	(2)	(2)
Net periodic pension benefit cost	9	10	19	20
Defined benefit plan, contributions by employer			23
U.S. Plans
Net Periodic Postretirement Benefit Cost
Service cost	2	2	4	4
Interest cost	9	10	19	19
Expected returns on plan assets	(9)	(10)	(19)	(19)
Amortization of net actuarial loss	1	1	2	2
Net periodic pension benefit cost	$ 3	$ 3	$ 6	$ 6