Retirement and Post-Retirement Benefit Plans (Details 4) - USD ($)	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Change in benefit obligation:
Settlement	$ 0	$ 0	$ 9,000,000
Defined Benefit Plans
Change in fair value of plan assets:
Fair value—beginning of year	12,167,000,000	12,610,000,000
Transfer to Everett/Seattle plans	(5,000,000)	6,000,000
Addition/deletion of plans	(14,000,000)	181,000,000
Actual return on plan assets	1,542,000,000	93,000,000
Employer contributions	166,000,000	158,000,000
Participant contributions	24,000,000	25,000,000
Benefits paid	(387,000,000)	(450,000,000)
Settlement	(67,000,000)	(104,000,000)
Currency impact	8,000,000	(352,000,000)
Fair value—end of year	13,434,000,000	12,167,000,000	12,610,000,000
Change in benefit obligation:
Projected benefit obligation—beginning of year	12,668,000,000	13,069,000,000
Transfer from Parent	(7,000,000)	5,000,000
Addition/deletion of plans	(12,000,000)	181,000,000
Service cost	85,000,000	105,000,000	139,000,000
Interest cost	215,000,000	225,000,000	213,000,000
Participant contributions	24,000,000	25,000,000
Actuarial (gain) loss	1,710,000,000	(40,000,000)
Benefits paid	(387,000,000)	(450,000,000)
Plan amendments	12,000,000	22,000,000
Curtailment	0	(4,000,000)
Settlement	(67,000,000)	(104,000,000)
Special termination benefits	2,000,000	6,000,000
Currency impact	(18,000,000)	(372,000,000)
Projected benefit obligation—end of year	14,225,000,000	12,668,000,000	13,069,000,000
Funded status at end of year	(791,000,000)	(501,000,000)
Accumulated benefit obligation	$ 13,995,000,000	$ 12,446,000,000
Weighted average assumptions used to calculate the projected benefit obligations for Direct plans:
Discount rate	1.20%	2.10%
Expected increase in compensation levels	2.50%	2.50%
Net amounts recognized for the Direct plans in Combined and Consolidated Balance Sheets:
Non-current assets	$ 864,000,000	$ 829,000,000
Current liabilities	(45,000,000)	(40,000,000)
Non-current liabilities	(1,610,000,000)	(1,290,000,000)
Funded status at end of year	(791,000,000)	(501,000,000)
Pretax net actuarial loss (gain) and prior service benefit recognized in accumulated other comprehensive loss for and prior service benefit recognized in Accumulated other comprehensive loss for the Direct defined benefit plans:
Net actuarial loss	3,300,000,000
Prior service benefit	(40,000,000)
Total recognized in accumulated other comprehensive loss	3,260,000,000
Net actuarial loss and prior service benefit for Direct plans that are expected to be amortized from Accumulated other comprehensive loss and recognized as components of net periodic benefit cost (credit):
Net actuarial loss (gain)	261,000,000
Prior service benefit	(14,000,000)
Total expected to be recognized in net periodic benefit cost (credit)	247,000,000
Direct defined benefit plans with projected benefit obligations exceeding the fair value of plan assets:
Aggregate fair value of plan assets	3,585,000,000	2,314,000,000
Aggregate projected benefit obligation	5,238,000,000	3,644,000,000
Direct defined benefit plans with accumulated benefit obligations exceeding the fair value of plan assets:
Aggregate fair value of plan assets	3,574,000,000	2,291,000,000
Aggregate accumulated benefit obligation	5,088,000,000	3,495,000,000
Defined Benefit Plans | U.S. Plans
Change in fair value of plan assets:
Fair value—beginning of year	0
Fair value—end of year	0	0
Change in benefit obligation:
Projected benefit obligation—beginning of year	5,000,000
Projected benefit obligation—end of year	6,000,000	5,000,000
Defined Benefit Plans | Non-U.S. Plans
Change in fair value of plan assets:
Fair value—beginning of year	12,167,000,000
Fair value—end of year	13,434,000,000	12,167,000,000
Post-Retirement Benefit Plans
Change in fair value of plan assets:
Fair value—beginning of year	52,000,000	50,000,000
Transfer to Everett/Seattle plans	0	0
Addition/deletion of plans	0	0
Actual return on plan assets	1,000,000	1,000,000
Employer contributions	5,000,000	6,000,000
Participant contributions	4,000,000	4,000,000
Benefits paid	(8,000,000)	(9,000,000)
Settlement	0	0
Currency impact	0	0
Fair value—end of year	54,000,000	52,000,000	50,000,000
Change in benefit obligation:
Projected benefit obligation—beginning of year	160,000,000	170,000,000
Transfer from Parent	0	0
Addition/deletion of plans	0	0
Service cost	1,000,000	1,000,000	3,000,000
Interest cost	7,000,000	7,000,000	6,000,000
Participant contributions	4,000,000	4,000,000
Actuarial (gain) loss	17,000,000	(9,000,000)
Benefits paid	(8,000,000)	(9,000,000)
Plan amendments	0	0
Curtailment	0	0
Settlement	0	0
Special termination benefits	0	0
Currency impact	(2,000,000)	(4,000,000)
Projected benefit obligation—end of year	179,000,000	160,000,000	$ 170,000,000
Funded status at end of year	(125,000,000)	(108,000,000)
Accumulated benefit obligation	$ 0	$ 0
Weighted average assumptions used to calculate the projected benefit obligations for Direct plans:
Discount rate	3.40%	4.90%
Expected increase in compensation levels	0.00%	0.00%
Net amounts recognized for the Direct plans in Combined and Consolidated Balance Sheets:
Non-current assets	$ 0	$ 0
Current liabilities	(6,000,000)	(6,000,000)
Non-current liabilities	(119,000,000)	(102,000,000)
Funded status at end of year	(125,000,000)	$ (108,000,000)
Pretax net actuarial loss (gain) and prior service benefit recognized in accumulated other comprehensive loss for and prior service benefit recognized in Accumulated other comprehensive loss for the Direct defined benefit plans:
Net actuarial loss	9,000,000
Prior service benefit	0
Total recognized in accumulated other comprehensive loss	9,000,000
Net actuarial loss and prior service benefit for Direct plans that are expected to be amortized from Accumulated other comprehensive loss and recognized as components of net periodic benefit cost (credit):
Net actuarial loss (gain)	(1,000,000)
Prior service benefit	0
Total expected to be recognized in net periodic benefit cost (credit)	$ (1,000,000)