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Significant Accounting Policies (Details)	Mar. 31, 2012	Mar. 26, 2011	Mar. 27, 2010
Company's sales mix
Revenue recognition	100.00%	100.00%	100.00%
Brakes [Member]
Company's sales mix
Revenue recognition	18.00%	18.00%	19.00%
Exhaust [Member]
Company's sales mix
Revenue recognition	5.00%	5.00%	6.00%
Steering [Member]
Company's sales mix
Revenue recognition	10.00%	11.00%	11.00%
Tires [Member]
Company's sales mix
Revenue recognition	39.00%	38.00%	34.00%
Maintenance [Member]
Company's sales mix
Revenue recognition	28.00%	28.00%	30.00%

X

- Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

+ References

No definition available.

+ Details

Name:	us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant