Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 26, 2013	Jul. 27, 2012
U.S. Pension Benefits
Net Periodic Benefit Cost
Service cost	$ 27	$ 26
Interest cost	24	23
Expected return on plan assets	(35)	(32)
Amortization of net actuarial loss	21	18
Net periodic benefit cost	37	35
Non-U.S. Pension Benefits
Net Periodic Benefit Cost
Service cost	14	11
Interest cost	7	7
Expected return on plan assets	(9)	(8)
Amortization of net actuarial loss	2	2
Net periodic benefit cost	14	12
Post-Retirement Benefits
Net Periodic Benefit Cost
Service cost	5	5
Interest cost	3	4
Expected return on plan assets	(5)	(4)
Amortization of net actuarial loss	0	1
Net periodic benefit cost	$ 3	$ 6