Postretirement Benefit Plans (Weighted-Average Assumptions Used in Net Periodic Benefit Costs) (Details)	12 Months Ended
Mar. 25, 2017	Mar. 26, 2016	Mar. 28, 2015
Postretirement Benefit Plans [Abstract]
Discount rate	3.60%	3.20%	4.00%
Expected long-term return on plan assets	4.93%	4.65%	5.36%

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration