Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 25, 2014	Jul. 26, 2013
U.S. Pension Benefits
Net Periodic Benefit Cost
Service cost	$ 26	$ 27
Interest cost	26	24
Expected return on plan assets	(39)	(35)
Amortization of net actuarial loss	16	21
Net periodic benefit cost	29	37
Non-U.S. Pension Benefits
Net Periodic Benefit Cost
Service cost	15	14
Interest cost	8	7
Expected return on plan assets	(10)	(9)
Amortization of net actuarial loss	3	2
Net periodic benefit cost	16	14
Post-Retirement Benefits
Net Periodic Benefit Cost
Service cost	5	5
Interest cost	4	3
Expected return on plan assets	(6)	(5)
Amortization of net actuarial loss	0	0
Net periodic benefit cost	$ 3	$ 3