Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Non-U.S. Plans
Defined Benefit Plan, Net Periodic Pension Benefit Cost
Service cost	$ 12	$ 11	$ 24	$ 23
Interest cost	10	11	21	21
Expected return on plan assets	(16)	(17)	(32)	(34)
Amortization of net actuarial loss	6	5	12	11
Amortization of prior service credit	(2)	(1)	(4)	(3)
Net periodic pension benefit cost	10	9	21	18
Defined Benefit Plan Contributions
Defined benefit plan, contributions by employer			19
U.S. Plans
Defined Benefit Plan, Net Periodic Pension Benefit Cost
Service cost	3	4	6	7
Interest cost	11	11	23	22
Expected return on plan assets	(15)	(15)	(29)	(30)
Amortization of net actuarial loss	5	5	9	11
Net periodic pension benefit cost	$ 4	$ 5	$ 9	$ 10