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FAIR VALUE MEASUREMENTS, Fair value measures and impairments (Details) - USD ($)	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Long-Lived Assets
Impairment of Long-Lived Assets Held-for-use	$ 0	$ 0
Impairment of non-marketable securities	0
Impairment of long-lived assets held for sale	0	0
Non-marketable equity securities carrying amount	25,000,000	23,000,000
Investments
Impairment of Investments	$ 0	$ 0

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- Definition

Assets Long Lived [Abstract]

+ References

No definition available.

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
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- Definition

Amount of cumulative impairment loss on investment in equity security without readily determinable fair value.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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- References

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