Restructuring - Narrative (Details) - USD ($)	3 Months Ended
	Jul. 27, 2018	Jul. 28, 2017
Enterprise Excellence
Restructuring Cost and Reserve [Line Items]
Charges	$ 120,000,000
Accrual (reversal of accrual) for restructuring reserves	(2,000,000)
Cost Synergies
Restructuring Cost and Reserve [Line Items]
Charges	0	$ 19,000,000
Accrual (reversal of accrual) for restructuring reserves	(5,000,000)	(5,000,000)
Cost Synergies | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Charges		5,000,000
Cost Synergies | Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Charges		$ 1,000,000
Minimum | Pre tax exit and disposal costs and other | Enterprise Excellence
Restructuring Cost and Reserve [Line Items]
Expected cost	1,600,000,000
Maximum | Pre tax exit and disposal costs and other | Enterprise Excellence
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 1,800,000,000