Discontinued Operations - Narrative (Details) - Spinoff $ in Millions	12 Months Ended
Oct. 31, 2017 USD ($)
Everett Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash transfer	$ 711
Seattle SpinCo, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash transfer	$ 227

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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