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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Jan. 31, 2021 | Nov. 01, 2020
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Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | $ 36,146 | $ 36,136
Accumulated amortization | (20,752) | (19,379)
Finite-lived intangible assets, net book value | 15,394 | 16,757
Intangible assets, gross | 36,171 | 36,161
Intangible assets, net book value | 15,419 | 16,782
In-process research and development |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
In-process research and development | 25 | 25
Purchased technology |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 24,126 | 24,119
Accumulated amortization | (14,797) | (13,925)
Finite-lived intangible assets, net book value | 9,329 | 10,194
Customer contracts and related relationships |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 8,392 | 8,389
Accumulated amortization | (3,525) | (3,179)
Finite-lived intangible assets, net book value | 4,867 | 5,210
Order backlog |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 2,579 | 2,579
Accumulated amortization | (1,965) | (1,836)
Finite-lived intangible assets, net book value | 614 | 743
Trade names |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 797 | 797
Accumulated amortization | (341) | (322)
Finite-lived intangible assets, net book value | 456 | 475
Other |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 252 | 252
Accumulated amortization | (124) | (117)
Finite-lived intangible assets, net book value | $ 128 | $ 135

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