Significant Accounting Policies (Company's sales mix) (Details)	12 Months Ended
	Mar. 25, 2017	Mar. 26, 2016	Mar. 28, 2015
Company's sales mix
Revenue recognition	100.00%	100.00%	100.00%
Brakes [Member]
Company's sales mix
Revenue recognition	13.00%	15.00%	15.00%
Exhaust [Member]
Company's sales mix
Revenue recognition	2.00%	3.00%	3.00%
Steering [Member]
Company's sales mix
Revenue recognition	9.00%	10.00%	10.00%
Tires [Member]
Company's sales mix
Revenue recognition	49.00%	45.00%	44.00%
Maintenance [Member]
Company's sales mix
Revenue recognition	27.00%	27.00%	28.00%