Common Stock (Tables)

9 Months Ended

Jul. 31, 2017

Equity [Abstract]

Schedule of Share Repurchase Activity

Repurchase Activity

	Nine Months Ended July 31,
(in millions, except per share amounts)	2017		2016
Total number of shares purchased	0.2		1.0
Average price paid per share	$	40.07	$	31.42
Total cash paid for share repurchases	$	7.9	$	31.2