Stock-Based Compensation - Weighted-Average Fair Value and Assumptions Used to Measure Fair Value of Stock Options (Details) - Stock Options - $ / shares	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value (in dollars per share)	$ 4	$ 8	$ 7
Expected volatility (as a percent)	36.20%	26.80%	33.10%
Risk-free interest rate (as a percent)	1.80%	1.70%	1.80%
Expected dividend yield (percent)	3.50%	1.80%	2.10%
Expected performance period	6 years	5 years 10 months 24 days	5 years 8 months 12 days