Restructuring and Related Costs - Reconciliation Restructuring (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2016
Restructuring Reserve [Roll Forward]
Balance, at beginning of period			$ 6.6	$ 6.6
Cost recognized	[1],[2]	$ 8.8	7.2
Payments				(12.4)
Balance, at end of period		10.3		10.3
External Support Fees
Restructuring Reserve [Roll Forward]
Balance, at beginning of period			2.1	2.1
Cost recognized	[1],[2]	4.5	4.6
Payments				(7.6)
Balance, at end of period		3.6		3.6
Employee Severance
Restructuring Reserve [Roll Forward]
Balance, at beginning of period			4.3	4.3
Cost recognized	[1],[2]	3.7	1.8
Payments				(3.8)
Balance, at end of period		6.0		6.0
Lease Exit and Other
Restructuring Reserve [Roll Forward]
Balance, at beginning of period			0.2	0.2
Cost recognized	[1],[2]	0.6	$ 0.8
Payments				(1.0)
Balance, at end of period		$ 0.6		$ 0.6

[1] From inception of our 2020 Vision in the fourth quarter of 2015, we have incurred cumulative restructuring and related charges of $28.7 million, consisting of external support fees of $13.7 million, employee severance costs of $10.3 million, asset impairment costs of $2.6 million, and lease exit and other costs of $2.2 million.

[2] The results by segment exclude these costs, consistent with the manner in which our management evaluates the performance of each reportable segment based on its respective operating profit results. These costs are included within Corporate expenses. See Note 15, “Segment Information,” for more information.