Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2020	Jul. 26, 2019
Enterprise Excellence
Restructuring Cost and Reserve [Line Items]
Charges	$ 79	$ 136
Accrual adjustments	2	12
Enterprise Excellence | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Charges	27	35
Enterprise Excellence | Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Charges	47	$ 42
Enterprise Excellence | Minimum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	1,600
Enterprise Excellence | Maximum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	1,800
Simplification
Restructuring Cost and Reserve [Line Items]
Charges	51
Simplification | Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Charges	1
Simplification | Minimum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	400
Simplification | Maximum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 450