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Auction Rate Securities (Tables) | 6 Months Ended
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Apr. 30, 2018
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, 2018 |  | October 31, 2017
Discount rates |  | L + 0.47% and L + 0.74% |  | L + 0.42% and L + 0.79%
Yields |  | 2.15%, L + 2.00% |  | 2.15%, L + 2.00%
Average expected lives |  | 4 – 10 years |  | 4 – 10 years
L – One Month LIBOR

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- Definition Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets. This disclosure may include, but is not limited to, the fair value of the asset, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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