PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 4) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Amounts recognized in balance sheet
Noncurrent asset	$ 215.6	$ 262.0
Pensions
Amounts recognized in balance sheet
Noncurrent asset	216.0	262.0
Current liability	(44.0)	(51.0)
Noncurrent liability	(1,194.0)	(954.0)
Funded status	(1,022.0)	(743.0)
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial loss	4,393.0	4,266.0
Prior service cost (credit)	83.0	42.0
Total	4,476.0	4,308.0
Accumulated Benefit Obligations - Additional Disclosures
Accumulated benefit obligation for pension plans	11,508.0	11,425.0
Accumulated Benefit Obligations in Excess of Plan Assets
Accumulated benefit obligations for pension plans with accumulated benefit obligations in excess of plan assets	7,254.0	1,381.0
Fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets	6,669.0	916.0
Projected Benefit Obligations in Excess of Plan Assets
Projected benefit obligations for pension plans with projected benefit obligations in excess of plan assets	8,196.0	8,213.0
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets	6,958.0	7,208.0
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2016
Net actuarial loss	208.0
Prior service cost (credit)	16.0
Total	224.0
Expected future employer contributions towards defined benefit plans, which are primarily direct benefit payments for unfunded plans	73.0
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2016	697.0
2017	688.0
2018	685.0
2019	690.0
2020	694.0
2021 to 2025	3,484.0
Health Care and Life Insurance
Amounts recognized in balance sheet
Current liability	(20.0)	(21.0)
Noncurrent liability	(5,375.0)	(5,326.0)
Funded status	(5,395.0)	(5,347.0)
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial loss	1,442.0	1,675.0
Prior service cost (credit)	(334.0)	(407.0)
Total	1,108.0	$ 1,268.0
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2016
Net actuarial loss	75.0
Prior service cost (credit)	(78.0)
Total	(3.0)
Expected future employer contributions towards defined benefit plans, which are primarily direct benefit payments for unfunded plans	25.0
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2016	317.0
2017	333.0
2018	339.0
2019	342.0
2020	344.0
2021 to 2025	$ 1,766.0