OTHER COMPREHENSIVE INCOME ITEMS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Accumulated other comprehensive income (loss)
Balance			$ 6,757.6	$ 9,065.5
Net current period other comprehensive income (loss)	$ 341.4	$ (48.6)	210.7	(510.9)
Balance	7,176.7	8,176.0	7,176.7	8,176.0
Total Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss)
Balance			(4,729.0)	(3,783.0)
Other comprehensive income (loss) items before reclassification			134.0	(594.0)
Amounts reclassified from accumulated other comprehensive income (loss)			76.0	83.0
Net current period other comprehensive income (loss)			210.0	(511.0)
Balance	(4,519.0)	(4,294.0)	(4,519.0)	(4,294.0)
Retirement Benefits Adjustment
Accumulated other comprehensive income (loss)
Balance			(3,501.0)	(3,493.0)
Other comprehensive income (loss) items before reclassification			(18.0)	(20.0)
Amounts reclassified from accumulated other comprehensive income (loss)			75.0	83.0
Net current period other comprehensive income (loss)	19.0	21.0	57.0	63.0
Balance	(3,444.0)	(3,430.0)	(3,444.0)	(3,430.0)
Cumulative Translation Adjustment
Accumulated other comprehensive income (loss)
Balance			(1,238.0)	(303.0)
Other comprehensive income (loss) items before reclassification			154.0	(577.0)
Net current period other comprehensive income (loss)	312.0	(67.0)	154.0	(577.0)
Balance	(1,084.0)	(880.0)	(1,084.0)	(880.0)
Unrealized Gain (Loss) on Derivatives
Accumulated other comprehensive income (loss)
Balance			(2.0)
Other comprehensive income (loss) items before reclassification			(1.0)	(2.0)
Amounts reclassified from accumulated other comprehensive income (loss)			2.0	2.0
Net current period other comprehensive income (loss)	1.0	1.0	1.0
Balance	(1.0)		(1.0)
Unrealized Gain (Loss) on Investments
Accumulated other comprehensive income (loss)
Balance			12.0	13.0
Other comprehensive income (loss) items before reclassification	9.0	(3.0)	(1.0)	5.0
Amounts reclassified from accumulated other comprehensive income (loss)			(1.0)	(2.0)
Net current period other comprehensive income (loss)	9.0	(4.0)	(2.0)	3.0
Balance	$ 10.0	$ 16.0	$ 10.0	$ 16.0