Discounted Lease Rentals: (Details)	Mar. 30, 2013
Discounted Lease Rentals:
Weighted average rate on a non-recourse basis (as a percent)	3.00%

Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of debt outstanding by type or by instrument at that time.

No definition available.

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