Auction Rate Securities (Tables)

6 Months Ended

Apr. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Significant Assumptions Used to Determine Fair Value of Auction Rate Securities

Significant Assumptions Used to Determine the Fair Values of Our Auction Rate Securities

Assumption	April 30, 2016	October 31, 2015
Discount rates	L + 0.51% – L + 1.66%	L + 0.38% – L + 2.13%
Yields	2.15%, L + 2.00%	2.15%, L + 2.00%
Average expected lives	4 – 10 years	4 – 10 years

L – One Month LIBOR