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Auction Rate Securities | 12 Months Ended
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Oct. 31, 2019
Investments, Debt and Equity Securities [Abstract] |
Auction Rate Securities | AUCTION RATE SECURITIES
At October 31, 2019 and 2018, we held an investment in one auction rate security that had an aggregate original principal amount, amortized cost, and fair value of $5.0 million. This auction rate security is a debt instrument with a stated maturity in 2050. The interest rate for this security is designed to be reset through Dutch auctions approximately every thirty days; however, auctions for this security have not occurred since August 2007. At October 31, 2019 and 2018, there were no unrealized gains or losses on our auction rate security included in AOCI. Significant Assumptions Used to Determine the Fair Value of Our Auction Rate Security
Assumption |  | October 31, 2019 |  | October 31, 2018
Discount rates |  | L + 0.34% |  | L + 0.37%
Yields |  | L + 2.00% |  | L + 2.00%
Average expected lives |  | 4 years |  | 4 years
L – One Month LIBOR

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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