Subsequent Events (Details) (Subsequent Event [Member], USD $)	0 Months Ended
	Apr. 08, 2015 Store	Feb. 28, 2015
Subsequent Event [Line Items]
Disposal group, including discontinued operation, current asssets held for sale		$ 300,000,000
Disposal group, including discontinued operation, long-term assets available for sale		900,000,000
Disposal group, including discontinued operation, current liabilities held for sale		100,000,000
Restructuring Plan [Member]
Subsequent Event [Line Items]
Term of cost reduction initiative	3 years
Cost reduction initiative	1,000,000,000
Approximate number of store closings	200
Restructuring Plan [Member] | Maximum [Member]
Subsequent Event [Line Items]
Estimated restructuring costs	2,000,000,000
Real estate costs	600,000,000
Write-offs	800,000,000
Employee severance costs	600,000,000
Estimated restructuring charges related to the program	750,000,000
Estimated restructuring charges related to the program in fiscal 2016	700,000,000
Restructuring Plan [Member] | Minimum [Member]
Subsequent Event [Line Items]
Estimated restructuring costs	1,500,000,000
Real estate costs	450,000,000
Write-offs	600,000,000
Employee severance costs	450,000,000
Estimated restructuring charges related to the program	500,000,000
Estimated restructuring charges related to the program in fiscal 2016	$ 400,000,000