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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. 27, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | $ 73 | $ 117 | $ 45
Charges | 322 | 358 | 756
Cash payments | (299) | (372) | (606)
Non-cash items | (63) | (30) | (78)
Liability, end of period | 33 | 73 | 117
FISCAL 2017 AND PRIOR YEAR PLANS | Employee Severance |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 41 | 74 | 21
Charges | 0 | 227 | 625
Cash payments | (41) | (262) | (569)
Non-cash items | 0 | 2 | (3)
Liability, end of period | 0 | 41 | 74
FISCAL 2017 AND PRIOR YEAR PLANS | Other |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 13 | 43 | 24
Charges | (1) | 23 | 131
Cash payments | (7) | (35) | (37)
Non-cash items | 0 | (18) | (75)
Liability, end of period | 5 | 13 | 43
FISCAL 2018 PLAN | Employee Severance |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 19 | 0 | 0
Charges | 252 | 92 | 0
Cash payments | (248) | (73) | 0
Non-cash items | (1) | 0 | 0
Liability, end of period | 22 | 19 | 0
FISCAL 2018 PLAN | Other |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Liability, beginning of period | 0 | 0 | 0
Charges | 71 | 16 | 0
Cash payments | (3) | (2) | 0
Non-cash items | (62) | (14) | 0
Liability, end of period | $ 6 | $ 0 | $ 0

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