Common Stock (Tables)

3 Months Ended

Jan. 31, 2017

Equity [Abstract]

Class of Treasury Stock

Repurchase Activity

	Three Months Ended January 31,
(in millions, except per share amounts)	2017		2016
Total number of shares purchased	0.2		0.4
Average price paid per share	$	40.07	$	28.19
Total cash paid for share repurchases	$	7.9	$	11.3