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Restructuring and Other Charges - Schedule of Activities Related to Restructuring and Other Charges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | $ 72 | $ 33 | $ 73
Charges | 886 | 481 | 322
Cash payments | (890) | (327) | (299)
Non-cash items | (34) | (115) | (63)
Liability, end of period | 34 | 72 | 33
FISCAL 2020 AND PRIOR PLANS | Employee Severance |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 58 | 22 | 60
Charges | 0 | 353 | 252
Cash payments | (58) | (317) | (289)
Non-cash items | 0 | 0 | (1)
Liability, end of period | 0 | 58 | 22
FISCAL 2020 AND PRIOR PLANS | Other |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 14 | 11 | 13
Charges | 5 | 128 | 70
Cash payments | (6) | (10) | (10)
Non-cash items | (3) | (115) | (62)
Liability, end of period | 10 | 14 | 11
FISCAL 2021 PLAN |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Charges | 881 |  |
FISCAL 2021 PLAN | Employee Severance |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 0 | 0 | 0
Charges | 836 | 0 | 0
Cash payments | (821) | 0 | 0
Non-cash items | 1 | 0 | 0
Liability, end of period | 16 | 0 | 0
FISCAL 2021 PLAN | Other |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 0 | 0 | 0
Charges | 45 | 0 | 0
Cash payments | (5) | 0 | 0
Non-cash items | (32) | 0 | 0
Liability, end of period | $ 8 | $ 0 | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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