Stockholders' Equity (Details)					12 Months Ended
	Aug. 07, 2018 USD ($) $ / shares	Feb. 09, 2018 USD ($) $ / shares	Aug. 07, 2017 USD ($) $ / shares	Feb. 09, 2017 USD ($) $ / shares	Oct. 31, 2018 USD ($) $ / shares shares	Oct. 31, 2017 USD ($) $ / shares shares	Oct. 31, 2016 USD ($)	Mar. 01, 2017 USD ($)	Feb. 28, 2017 USD ($)
Equity [Abstract]
Share repurchase program, maximum amount authorized								$ 1,000,000,000.0	$ 500,000,000.0
Number of shares purchased | shares					0	257,500
Cost of common stock repurchased						$ (55,000,000)
Share repurchase program, remaining authorized amount					$ 563,500,000
Dividends on common stock	$ 1,500,000	$ 1,500,000	$ 1,500,000	$ 1,500,000	$ 2,900,000	$ 2,900,000	$ 2,900,000
Cash dividend, per share (usd per share) | $ / shares	$ 0.03	$ 0.03	$ 0.03	$ 0.03	$ 0.03	$ 0.03
Date of record	Jul. 23, 2018	Jan. 23, 2018	Jul. 21, 2017	Jan. 23, 2017
Common stock purchase right versus preferred share purchase right					0.5