Business Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 06, 2014	Nov. 29, 2014 Store
Business Acquisition [Line Items]
Total payment related to acquisition	$ 34
Cash payment related to acquisition	5
Fair value of assets acquired	39us-gaap_FairValueOfAssetsAcquired
Fair value of property, plant and equipment acquired	15
Fair value of goodwill acquired	14
Fair value of inventories acquired	5
Fair value of identifiable finite-lived intangible assets acquired	4
Fair value of other current assets acquired	1
Save-A-Lot Licensee Stores [Member]
Business Acquisition [Line Items]
Cash payment related to acquisition		$ 18
Number of stores		35
Rainbow Foods grocery stores [Member]
Business Acquisition [Line Items]
Number of stores acquired	7
Rainbow Foods grocery stores [Member] \| Minority Interest [Member]
Business Acquisition [Line Items]
Number of stores acquired	2
Rainbow Foods pharmacy locations [Member]
Business Acquisition [Line Items]
Number of stores acquired	11
Rainbow Foods liquor store [Member]
Business Acquisition [Line Items]
Number of stores acquired	1
Cub Foods grocery stores [Member] \| Minority Interest [Member]
Business Acquisition [Line Items]
Number of stores acquired	5
Diamond Lake 1994 L.L.C [Member]
Business Acquisition [Line Items]
Number of stores acquired	3

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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The fair value of assets acquired in noncash investing or financing activities.

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The number of businesses acquired by the entity during the period.

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Represents the number of stores.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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