Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
U.S. Plans
Defined Benefit Plan, Net Periodic Pension Benefit Cost
Service cost	$ 3	$ 3	$ 10	$ 9
Interest cost	11	11	33	33
Expected return on plan assets	(15)	(13)	(45)	(40)
Amortization of net actuarial loss	6	10	17	30
Net periodic pension benefit cost	5	11	15	32
Non-U.S. Plans
Defined Benefit Plan, Net Periodic Pension Benefit Cost
Service cost	12	13	35	39
Interest cost	10	9	31	27
Expected return on plan assets	(18)	(18)	(52)	(53)
Amortization of net actuarial loss	7	11	18	32
Amortization of prior service credit	(2)	(2)	(5)	(5)
Net periodic pension benefit cost	$ 9	$ 13	27	$ 40
Defined Benefit Plan Contributions
Defined benefit plan, contributions by employer			$ 36