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Acquisitions Finite Intangible Assets Acquired (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 17, 2017 | Feb. 01, 2016 | Nov. 04, 2018 | Oct. 29, 2017
Trade names |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Estimated useful life |  |  | 12 years | 13 years
Other |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Estimated useful life |  |  | 10 years | 10 years
BRCM [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 12,858 |  |
Intangible assets, net of assets held for sale |  | 14,808 |  |
Intangible assets acquired included in assets held for sale |  | 15,128 |  |
BRCM [Member] | Developed technology |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 9,010 |  |
Estimated useful life |  | 6 years |  |
BRCM [Member] | Customer Contracts |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 2,703 |  |
Estimated useful life |  | 2 years |  |
BRCM [Member] | Order backlog |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 750 |  |
Estimated useful life |  | 1 year |  |
BRCM [Member] | Trade names |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 350 |  |
Estimated useful life |  | 17 years |  |
BRCM [Member] | Other |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 45 |  |
Estimated useful life |  | 16 years |  |
BRCM [Member] | Discontinued Operations, Held-for-sale [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets |  | $ 320 |  |
Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets | $ 3,241 |  |  |
Intangible assets, net of assets held for sale | 3,396 |  |  |
Brocade Communications Systems, Inc. [Member] | Developed technology |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets | $ 2,925 |  |  |
Estimated useful life | 10 years |  |  |
Brocade Communications Systems, Inc. [Member] | Customer Contracts |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets | $ 255 |  |  |
Estimated useful life | 11 years |  |  |
Brocade Communications Systems, Inc. [Member] | Trade name and other [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total identified finite-lived intangible assets | $ 61 |  |  |
Estimated useful life | 6 years |  |  |
In-process research and development [Member] | BRCM [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired |  | $ 1,950 |  |
In-process research and development [Member] | Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 155 |  |  |
Directors [Member] | In-process research and development [Member] | Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 64 |  |  |
Percentage of completion | 72.00% |  |  |
Estimated costs to complete | $ 45 |  |  |
Year of completion | 2019 |  |  |
Switches [Member] | In-process research and development [Member] | Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 50 |  |  |
Percentage of completion | 81.00% |  |  |
Estimated costs to complete | $ 21 |  |  |
Year of completion | 2018 |  |  |
Embedded [Member] | In-process research and development [Member] | Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 31 |  |  |
Percentage of completion | 74.00% |  |  |
Estimated costs to complete | $ 22 |  |  |
Year of completion | 2019 |  |  |
Networking software [Member] | In-process research and development [Member] | Brocade Communications Systems, Inc. [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 10 |  |  |
Percentage of completion | 73.00% |  |  |
Estimated costs to complete | $ 27 |  |  |
Year of completion | 2018 |  |  |

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