Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Restructuring Cost and Reserve [Line Items]
Incremental expense related to acceptance of voluntary early retirement packages	$ 97		$ 97
Enterprise Excellence
Restructuring Cost and Reserve [Line Items]
Charges	90	$ 95	169	$ 231
Accrual adjustments	3	1	5	13
Enterprise Excellence | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Charges	32	32	59	67
Enterprise Excellence | Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Charges	48	$ 35	95	$ 77
Enterprise Excellence | Minimum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	1,600		1,600
Enterprise Excellence | Maximum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	1,800		1,800
Simplification
Restructuring Cost and Reserve [Line Items]
Charges			56
Accrual adjustments	8		8
Charges, including incremental defined benefit pension and post-retirement expenses for employees that accepted voluntary early retirement packages	102		153
Incremental expense related to acceptance of voluntary early retirement packages	97		97
Simplification | Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Charges	2		3
Simplification | Minimum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	400		400
Simplification | Maximum | Pre-tax exit and disposal costs and other
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 450		$ 450