Retirement and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
U.S. Defined Benefit Plans
Net periodic benefit (credit) cost
Interest cost	$ 136	$ 139	$ 272	$ 278
Expected return on plan assets	(183)	(217)	(366)	(434)
Amortization and deferrals:
Actuarial loss (gain)	14	12	28	25
Net periodic benefit (credit) cost	(33)	(66)	(66)	(131)
Settlement loss	1		1
Total periodic benefit (credit) cost from continuing operations	(32)	(66)	(65)	(131)
Continuing operations	(32)	(66)	(65)	(131)
Discontinued operations		5		10
Total periodic benefit (credit) cost	(32)	(61)	(65)	(121)
Non-U.S. Defined Benefit Plans
Net periodic benefit (credit) cost
Service cost	12	63	23	131
Interest cost	6	89	12	188
Expected return on plan assets	(12)	(189)	(24)	(395)
Amortization and deferrals:
Actuarial loss (gain)	6	70	12	147
Prior service benefit	(1)	(5)	(2)	(10)
Net periodic benefit (credit) cost	11	28	21	61
Settlement loss	1	2	1	2
Special termination benefits		7		8
Plan (credit) expense allocation		(7)		(11)
Total periodic benefit (credit) cost from continuing operations	12	30	22	60
Continuing operations	12	30	22	60
Discontinued operations		26		53
Total periodic benefit (credit) cost	12	56	22	113
Employer Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2016			18
Expected contribution to defined benefit plans during remainder of fiscal year	8		8
Contributions to benefit plans			10
U.S. non-qualified plan participants
Employer Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2016			33
Expected contribution to defined benefit plans during remainder of fiscal year	16		16
Contributions to benefit plans			17
Post-Retirement Benefit Plans
Net periodic benefit (credit) cost
Service cost		1		2
Interest cost	5	7	10	14
Expected return on plan assets	(8)	(9)	(16)	(18)
Amortization and deferrals:
Actuarial loss (gain)	(3)	(3)	(6)	(6)
Prior service benefit	(4)	(5)	(8)	(10)
Net periodic benefit (credit) cost	(10)	(9)	(20)	(18)
Special termination benefits	9		9
Plan (credit) expense allocation		8		16
Total periodic benefit (credit) cost from continuing operations	(1)	(1)	(11)	(2)
Continuing operations	(1)	(1)	(11)	(2)
Discontinued operations		(8)		(16)
Total periodic benefit (credit) cost	(1)	$ (9)	(11)	$ (18)
Employer Contributions and Funding Policy
Reduction in expected contributions	11
Expected contribution to defined benefit plans in fiscal 2016			35
Expected contribution to defined benefit plans during remainder of fiscal year	$ 17		17
Contributions to benefit plans			$ 18