Stock Repurchase Program - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended		182 Months Ended
	Sep. 28, 2012	Feb. 09, 2013	Feb. 09, 2012	Feb. 09, 2013
Stock Repurchase Program [Line Items]
Stock repurchased authorized value	$ 11,900,000,000
Stock repurchased cumulative, shares				132,500,000
Stock repurchased during period, shares		1,367,832
Purchase of treasury stock		502,300,000
Remaining value authorized for share repurchases		603,400,000		603,400,000
Stock repurchase authorized during the period, value	750,000,000
Stock repurchase authorized amended value	12,650,000,000
Treasury stock acquired repurchase authorization		From January 1, 1998 to February 9, 2013, the Company has repurchased a total of 132.5 million shares at an aggregate cost of $12.0 billion, including 1,367,832 shares of its common stock at an aggregate cost of $502.3 million during the twenty-four week period ended February 9, 2013. On September 28, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.90 billion to $12.65 billion. Considering the cumulative repurchases as of February 9, 2013, the Company had $603.4 million remaining under the Board’s authorization to repurchase its common stock. The Company did not repurchase shares of its common stock subsequent to February 9, 2013.
Stock repurchased during period, amount				12,000,000,000
Share of treasury stock retired		3,900,000	4,900,000
Retained deficit [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		1,362,200,000	1,319,600,000
Additional paid-in capital [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		$ 75,700,000	72,500,000