Derivative Instruments and Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended				6 Months Ended				0 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014 Website	Jun. 28, 2014 Software	Jun. 28, 2014 Retail Stores	Jun. 29, 2013 Retail Stores	Jun. 28, 2014 Retail Stores	Jun. 29, 2013 Retail Stores	Jun. 28, 2014 Retail Stores Discounted Cash Flow Analysis Significant Unobservable Inputs (Level 3) Store	Jun. 28, 2014 Retail Stores Stores Reduced to Estimated Salvage Value Significant Unobservable Inputs (Level 3) Store	Jun. 28, 2014 Retail Stores Decrease in Sales Scenario Significant Unobservable Inputs (Level 3)	Jun. 28, 2014 Retail Stores Decrease in Sales Scenario Significant Unobservable Inputs (Level 3) Additional impairment charges	Jun. 28, 2014 Retail Stores Decrease in Gross Margin Scenario Significant Unobservable Inputs (Level 3)	Jun. 28, 2014 Retail Stores Decrease in Gross Margin Scenario Significant Unobservable Inputs (Level 3) Additional impairment charges	Jun. 28, 2014 Real Estate Significant Unobservable Inputs (Level 3)	Jun. 28, 2014 Real Estate Minimum Significant Unobservable Inputs (Level 3) Store
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairment charge	$ 22	$ 4	$ 72	$ 10	$ 12	$ 28	$ 10	$ 4	$ 19	$ 10				$ 1		$ 2
Number of anticipated closing stores																		400
Anticipated stores closing end of year																	2016
Number of stores impaired											36	95
Property and equipment, fair value											4
Percentage used for analysis											13.00%
Property and equipment, salvage value												2
Decrease in sales for scenario													1.00%		0.50%
Written off of capitalized software			$ 13