Postretirement Benefit Plans (Schedule of Allocation of Plan Assets) (Details)	Mar. 31, 2018	Mar. 25, 2017
Defined Benefit Plan Disclosure [Line Items]
Plan assets	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.00%	33.00%
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.00%	48.00%
Diversified growth
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.00%	19.00%
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Plan assets	100.00%	0.00%