Other Comprehensive Income Items (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Other comprehensive income (loss), before tax
Interest expense	$ (105.6)	$ (77.7)	$ (195.2)	$ (152.3)
Total other comprehensive income (loss), before tax	21.1	4.0	8.5	(45.8)
Other comprehensive income (loss), tax (expense) credit
Total other comprehensive income (loss), tax (expense) credit	(0.5)	(0.5)	(0.5)
Other comprehensive income (loss), after tax
Other comprehensive income (loss), net of income taxes	20.6	3.5	8.0	(45.8)
Cumulative Translation Adjustment
Other comprehensive income (loss), before tax
Total other comprehensive income (loss), before tax	19.7	2.5	7.0	(45.8)
Other comprehensive income (loss), after tax
Unrealized hedging gain (loss), after tax			7.0	(45.8)
Other comprehensive income (loss), net of income taxes	19.7	2.5	7.0	(45.8)
Unrealized Gain (Loss) on Derivatives
Other comprehensive income (loss), before tax
Unrealized hedging gain (loss), before tax	0.3	(0.3)	(1.7)	(3.9)
Total other comprehensive income (loss), before tax	1.4	1.5	1.5
Other comprehensive income (loss), tax (expense) credit
Unrealized hedging gain (loss), tax (expense) credit	(0.1)	0.1	0.6	1.4
Total other comprehensive income (loss), tax (expense) credit	(0.5)	(0.5)	(0.5)
Other comprehensive income (loss), after tax
Unrealized hedging gain (loss), after tax	0.2	(0.2)	(1.1)	(2.5)
Reclassification of realized (gain) loss, after tax			2.1	2.5
Other comprehensive income (loss), net of income taxes	0.9	1.0	1.0
Unrealized Gain (Loss) on Derivatives | Interest rate contracts | Reclassifications of realized gain (loss)
Other comprehensive income (loss), before tax
Interest expense	1.1	1.8	3.2	3.9
Other comprehensive income (loss), tax (expense) credit
Reclassification of realized (gain) loss, tax expense (credit)	(0.4)	(0.6)	(1.1)	(1.4)
Other comprehensive income (loss), after tax
Reclassification of realized (gain) loss, after tax	$ 0.7	$ 1.2	$ 2.1	$ 2.5