Pension and Other Postretirement Benefit Plans 5 (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	11 Months Ended	12 Months Ended
Jun. 07, 2013	Dec. 29, 2013	Apr. 28, 2013	Apr. 29, 2012	Apr. 27, 2011
Pension Plan, Defined Benefit [Member]
Weighted-average rates used for determining the projected benefit obligations
Discount rate	4.10%	4.50%	4.00%	4.80%
Compensation increase rate	3.40%	3.70%	3.50%	3.40%
Weighted-average rates used for determining the defined benefit plans
Expected rate of return	8.10%	6.20%	8.10%	8.20%	8.20%
Discount rate	4.00%	4.10%	4.00%	4.80%	5.60%
Compensation increase rate	3.50%	3.50%	3.50%	3.40%	4.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Weighted-average rates used for determining the projected benefit obligations
Discount rate	3.70%	4.30%	3.40%	4.10%
Compensation increase rate	0.00%	0.00%	0.00%	0.00%
Weighted-average rates used for determining the defined benefit plans
Expected rate of return	0.00%	0.00%	0.00%	0.00%	0.00%
Discount rate	3.40%	3.70%	3.40%	4.10%	5.50%
Compensation increase rate	0.00%	0.00%	0.00%	0.00%	0.00%
One-percentage-point-change
Effect on total service and interest cost components, 1% Increase		863
Effect on total service and interest cost components, 1% Decrease		(763)
Effect on postretirement benefit obligations, 1% Increase		15,697
Effect on postretirement benefit obligations, 1% Decrease		(14,209)

The interest rate used to adjust for the time value of money for the plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

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Expected rate of compensation increases (for pay-related plans).

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

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-Subparagraph (k)(2)

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The interest rate used to adjust for the time value of money.

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512013

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-Publisher FASB

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Expected rate of compensation increases (for pay-related plans).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

+ References

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-Publisher FASB

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

+ References

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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-Publisher FASB

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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