OTHER COMPREHENSIVE INCOME ITEMS - After-Tax Changes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Accumulated other comprehensive income (loss)
Balance	$ 6,757.6	$ 9,065.5	$ 10,267.7
Period Change	(896.6)	(946.8)	(1,090.2)
Balance	6,530.8	6,757.6	9,065.5
Total Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss)
Balance	(4,729.0)	(3,783.0)	(2,693.0)
Period Change	(897.0)	(946.0)	(1,090.0)
Balance	(5,626.0)	(4,729.0)	(3,783.0)
Retirement Benefits Adjustment
Accumulated other comprehensive income (loss)
Balance	(3,501.0)	(3,493.0)	(2,809.0)
Period Change	(908.0)	(8.0)	(684.0)
Balance	(4,409.0)	(3,501.0)	(3,493.0)
Cumulative Translation Adjustment
Accumulated other comprehensive income (loss)
Balance	(1,238.0)	(303.0)	113.0
Period Change	9.0	(935.0)	(416.0)
Balance	(1,229.0)	(1,238.0)	(303.0)
Unrealized Gain (Loss) on Derivatives
Accumulated other comprehensive income (loss)
Balance	(2.0)		(3.0)
Period Change	3.0	(2.0)	3.0
Balance	1.0	(2.0)
Unrealized Gain (Loss) on Investments
Accumulated other comprehensive income (loss)
Balance	12.0	13.0	6.0
Period Change	(1.0)	(1.0)	7.0
Balance	$ 11.0	$ 12.0	$ 13.0