Long-Term debt obligations - Leverage Ratio on which Spread on Libor Borrowings and Commitment Fee for Unused Balance of Revolving Credit Agreement are Determined (Detail)	12 Months Ended
	Oct. 31, 2019
Greater than 25 percent
Line of Credit Facility [Line Items]
Spread	0.25%
Commitment Fee	0.20%
Greater than or equal to 25 percent less than or equal to 35 percent
Line of Credit Facility [Line Items]
Spread	0.50%
Commitment Fee	0.25%
Greater than or equal to 35 percent less than or equal to 45 percent
Line of Credit Facility [Line Items]
Spread	1.00%
Commitment Fee	0.30%
Greater than or equal to 45 Percent
Line of Credit Facility [Line Items]
Spread	1.50%
Commitment Fee	0.35%