Retirement Benefit Plans (Details) - Pension plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
U.S.
Net Periodic Benefit Cost
Special termination benefits	$ 80	$ 0	$ 80	$ 0
Service cost	27	26	54	52
Interest cost	27	32	54	64
Expected return on plan assets	(61)	(56)	(122)	(112)
Amortization of net actuarial loss	17	14	35	28
Net periodic benefit cost	90	16	101	32
Non-U.S.
Net Periodic Benefit Cost
Special termination benefits	0	0	0	0
Service cost	17	15	34	30
Interest cost	7	7	13	14
Expected return on plan assets	(14)	(15)	(28)	(30)
Amortization of net actuarial loss	6	4	12	7
Net periodic benefit cost	$ 16	$ 11	$ 31	$ 21