Income Taxes - Difference Between U.S. Statutory Tax Rate and Effective Income Tax Rate (Detail)	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefit	6.50%	6.70%	7.00%
Federal and state tax credits	(9.60%)	(2.20%)	(7.30%)
Impact of foreign operations	(3.60%)	(1.10%)	(0.80%)
Changes in uncertain tax positions	(5.20%)	(2.00%)	(1.60%)
Nondeductible expenses and other, net	2.20%	3.10%	4.30%
Annual effective tax rate	25.30%	39.50%	36.60%