Restructuring and Related Costs - Reconciliation Restructuring (Details) $ in Millions	3 Months Ended
	Jan. 31, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	$ 8.0
Cost recognized	(5.0)
Payments	(5.2)
Balance, at end of period	7.9
Cumulative Charges	46.7
External Support Fees
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	1.2
Cost recognized	(1.3)
Payments	(1.7)
Balance, at end of period	0.8
Cumulative Charges	17.2
Employee Severance
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	3.8
Cost recognized	(0.5)
Payments	(1.4)
Balance, at end of period	3.0
Cumulative Charges	13.8
Other Project Fees
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	0.5
Cost recognized	(2.7)
Payments	(1.9)
Balance, at end of period	1.3
Cumulative Charges	7.3
Lease Exit
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	2.5
Cost recognized	(0.5)
Payments	(0.2)
Balance, at end of period	2.7
Cumulative Charges	3.7
Asset Impairment
Restructuring Reserve [Roll Forward]
Cumulative Charges	$ 4.7