Retirement Benefit Plans , Actuarial Assumptions and Plan Assets Target Allocations (Details)	12 Months Ended
	Apr. 29, 2016	Apr. 24, 2015	Apr. 25, 2014
U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate		4.20%	4.75%
Rate of compensation increase	3.90%	3.90%	3.90%
Critical assumptions – net periodic benefit cost:
Discount rate		4.75%	4.55%
Expected return on plan assets	8.20%	8.25%	8.25%
Rate of compensation increase	3.90%	3.90%	3.90%
Plan Assets Target Allocations
Target allocations	100.00%	100.00%
U.S. Pension Benefits [Member] | Marketable equity securities [Member]
Plan Assets Target Allocations
Target allocations	49.00%	49.00%
U.S. Pension Benefits [Member] | Debt Securities [Member]
Plan Assets Target Allocations
Target allocations	23.00%	23.00%
U.S. Pension Benefits [Member] | Other [Member]
Plan Assets Target Allocations
Target allocations	28.00%	28.00%
Non-U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate		1.88%	3.32%
Rate of compensation increase	2.83%	2.92%	2.80%
Critical assumptions – net periodic benefit cost:
Discount rate		3.32%	3.52%
Expected return on plan assets	4.35%	4.77%	4.76%
Rate of compensation increase	2.92%	2.80%	2.78%
Plan Assets Target Allocations
Target allocations	100.00%	100.00%
Non-U.S. Pension Benefits [Member] | Marketable equity securities [Member]
Plan Assets Target Allocations
Target allocations	34.00%	35.00%
Non-U.S. Pension Benefits [Member] | Debt Securities [Member]
Plan Assets Target Allocations
Target allocations	27.00%	29.00%
Non-U.S. Pension Benefits [Member] | Other [Member]
Plan Assets Target Allocations
Target allocations	39.00%	36.00%
Minimum [Member] | U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate	3.60%
Critical assumptions – net periodic benefit cost:
Discount rate	4.20%
Minimum [Member] | Non-U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate	0.25%
Critical assumptions – net periodic benefit cost:
Expected return on plan assets	0.80%
Maximum [Member] | U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate	4.30%
Critical assumptions – net periodic benefit cost:
Discount rate	4.80%
Maximum [Member] | Non-U.S. Pension Benefits [Member]
Critical assumptions – projected benefit obligation:
Discount rate	10.20%
Critical assumptions – net periodic benefit cost:
Expected return on plan assets	9.00%