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Overview and Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	3 Months Ended
	Jan. 31, 2020 USD ($) segment	Nov. 01, 2019 USD ($)
Accounting Policies [Abstract]
Number of new reportable segments | segment	4
Segment Reporting Information [Line Items]
ROU Assets	$ 1,053
Total lease liability balance	1,143
Accounting Standards Update 2016-02
Segment Reporting Information [Line Items]
ROU Assets		$ 1,000
Total lease liability balance		$ 1,100
Accumulated Other Comprehensive Loss | Accounting Standards Update 2018-02
Segment Reporting Information [Line Items]
Effects of adoption of accounting standard updates	43
Accumulated Deficit | Accounting Standards Update 2018-02
Segment Reporting Information [Line Items]
Effects of adoption of accounting standard updates	$ (43)

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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