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Acquisitions (Intangible Assets) (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 05, 2018 | Nov. 17, 2017 | Nov. 03, 2019 | Nov. 04, 2018
Customer contracts and related relationships |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted-average amortization periods (in years) |  |  | 5 years | 5 years
Order backlog |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted-average amortization periods (in years) |  |  | 3 years |
CA Technologies, Inc. |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets | $ 11,853 |  |  |
Total identified intangible assets | 12,045 |  |  |
CA Technologies, Inc. | In-process research and development |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified indefinite-lived intangible assets | 192 |  |  |
CA Technologies, Inc. | Developed technology |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets | $ 4,957 |  |  |
Weighted-average amortization periods (in years) | 6 years |  |  |
CA Technologies, Inc. | Customer contracts and related relationships |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets | $ 4,190 |  |  |
Weighted-average amortization periods (in years) | 6 years |  |  |
CA Technologies, Inc. | Order backlog |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets | $ 2,569 |  |  |
Weighted-average amortization periods (in years) | 3 years |  |  |
CA Technologies, Inc. | Trade name and other |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets | $ 137 |  |  |
Weighted-average amortization periods (in years) | 5 years |  |  |
Brocade Communications Systems, Inc. |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets |  | $ 3,241 |  |
Total identified intangible assets |  | 3,396 |  |
Brocade Communications Systems, Inc. | In-process research and development |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified indefinite-lived intangible assets |  | 155 |  |
Brocade Communications Systems, Inc. | Developed technology |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets |  | $ 2,925 |  |
Weighted-average amortization periods (in years) |  | 10 years |  |
Brocade Communications Systems, Inc. | Customer contracts and related relationships |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets |  | $ 255 |  |
Weighted-average amortization periods (in years) |  | 11 years |  |
Brocade Communications Systems, Inc. | Trade name and other |  |  |  |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Identified finite-lived intangible assets |  | $ 61 |  |
Weighted-average amortization periods (in years) |  | 6 years |  |

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