Other Comprehensive Income or Loss - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 12, 2014	Jul. 20, 2013	Jul. 12, 2014	Jul. 20, 2013
Statement Of Income And Comprehensive Income [Abstract]
Income loss reclassified from AOCI	$ 0.1	$ 0.2	$ 0.3	$ 0.3
Increase in selling general and administrative expenses	0.2	0.3	0.5	0.5
Decreased/Increased in income taxes	$ (0.1)	$ (0.1)	$ (0.2)	$ (0.2)

The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets.

No definition available.

Name:	us-gaap_IncreaseDecreaseInIncomeTaxes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration