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Acquisitions - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 30, 2020 | Oct. 25, 2019 | Oct. 30, 2020 | Oct. 25, 2019 | Jul. 31, 2020 | Apr. 24, 2020 | Jul. 26, 2019 | Apr. 26, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | $ 41,212 |  | $ 41,212 |  |  | $ 39,841 |  |
Purchase price contingent consideration | 158 | $ 7 | 158 | $ 65 |  |  |  |
Gain related to change in amounts accrued for certain contingent liabilities for recent acquisition | 132 |  | 132 |  |  |  |  |
Contingent consideration liabilities | 461 | 260 | 461 | 260 | $ 297 | 280 | $ 269 | $ 222
Other accrued expenses |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration liabilities | 342 |  | 342 |  |  | 112 |  |
Other liabilities |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration liabilities | 119 |  | 119 |  |  | $ 168 |  |
All Business Acquisitions |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Net assets acquired | 539 | 272 | 539 | 272 |  |  |  |
Total assets acquired | 577 | 324 | 577 | 324 |  |  |  |
Total liabilities assumed | 38 | 52 | 38 | 52 |  |  |  |
Inventory |  | 40 |  | 40 |  |  |  |
Goodwill | 381 | 92 | 381 | 92 |  |  |  |
Purchase price contingent consideration |  |  | 158 | 65 |  |  |  |
All Business Acquisitions | Technology-Based Intangible Assets |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | 156 | 139 | $ 156 | $ 139 |  |  |  |
All Business Acquisitions | Technology-Based Intangible Assets | Minimum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life |  |  | 8 years | 8 years |  |  |  |
All Business Acquisitions | Technology-Based Intangible Assets | Maximum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life |  |  | 15 years | 16 years |  |  |  |
All Business Acquisitions | Customer-Related Intangible Assets |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | $ 13 | $ 26 | $ 13 | $ 26 |  |  |  |
All Business Acquisitions | Customer-Related Intangible Assets | Minimum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life |  |  | 8 years | 8 years |  |  |  |
All Business Acquisitions | Customer-Related Intangible Assets | Maximum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life |  |  | 15 years | 16 years |  |  |  |

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