Restructuring - Termination Liability and Restructuring Reserve (Details) - Enterprise Excellence - USD ($) $ in Millions	3 Months Ended
Jul. 26, 2019	Jul. 27, 2018
Restructuring Reserve [Roll Forward]
Beginning balance	$ 122
Charges	136	$ 120
Cash payments	(127)
Settled non-cash	(6)
Accrual adjustments	(12)
Ending balance	113
Employee Termination Benefits
Restructuring Reserve [Roll Forward]
Beginning balance	101
Charges	52
Cash payments	(58)
Settled non-cash	0
Accrual adjustments	(5)
Ending balance	90
Associated Costs
Restructuring Reserve [Roll Forward]
Beginning balance	9
Charges	71
Cash payments	(62)
Settled non-cash	0
Accrual adjustments	0
Ending balance	18
Asset Write-Downs
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charges	6
Cash payments	0
Settled non-cash	(6)
Accrual adjustments	0
Ending balance	0
Other Costs
Restructuring Reserve [Roll Forward]
Beginning balance	12
Charges	7
Cash payments	(7)
Settled non-cash	0
Accrual adjustments	(7)
Ending balance	$ 5

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.

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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.

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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

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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