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NORTHERN CALIFORNIA WILDFIRES IMPACT (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018	Oct. 31, 2018	Apr. 30, 2019
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes	$ 0	$ 0	$ 0	$ 7
Insurance Recoveries		$ 32		63
Northern California Wildfires [Member]
Unusual or Infrequent Item, or Both [Line Items]
Insurance Recoveries			22	40	$ 68	$ 90
Property, Plant and Equipment [Member] | Northern California Wildfires [Member]
Unusual or Infrequent Item, or Both [Line Items]
Property, Plant and Equipment purchases			7	$ 9	$ 27	34
Uninsured Risk [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes			10
Minimum | Northern California Wildfires [Member]
Unusual or Infrequent Item, or Both [Line Items]
Insurance Settlements Receivable, Current	30		30			30
Maximum | Northern California Wildfires [Member]
Unusual or Infrequent Item, or Both [Line Items]
Insurance Settlements Receivable, Current	$ 40		$ 40			$ 40

X

- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake).

+ References

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- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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