Preferred and Common Stock Preferred and Common Stock - Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Sep. 01, 2015
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased, number of shares		1.0	0.8
Average price paid per share, usd per share		$ 30.72	$ 26.20
Total cash paid for share repurchase	[1]	$ 31.4	$ 20.0
Stock repurchase program, remaining authorized amount				$ 10.0
2015 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized amount		$ 188.6

[1] At October 31, 2015, authorization for $188.6 million of share repurchases remained under our current share repurchase program.