Common Stock - Repurchase Activity (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jan. 31, 2016 USD ($) $ / shares shares
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased (in shares) | shares	0.4
Average price of common shares repurchased (in dollars per share) | $ / shares	$ 28.19
Total cash paid for share repurchase	$ 11.3	[1]
2015 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount	$ 177.3

[1] At January 31, 2016, authorization for $177.3 million of share repurchases remained under our current share repurchase program.