Stock Repurchase Program - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended		208 Months Ended	1 Months Ended
	Mar. 24, 2015	May 09, 2015	May 10, 2014	May 09, 2015	Jun. 17, 2015	Mar. 23, 2015
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares		1,376,933		138,300,000
Purchase of treasury stock		$ 840,918,000	$ 911,537,000	$ 14,872,000,000
Increase in authorization of stock repurchase, value	750,000,000
Stock repurchase authorized amended value	15,650,000,000					14,900,000,000
Remaining value authorized for share repurchases		778,300,000		778,300,000
Treasury stock acquired repurchase authorization		From January 1, 1998 to May 9, 2015 the Company has repurchased a total of 138.3 million shares at an aggregate cost of $14.872 billion, including 1,376,933 shares of its common stock at an aggregate cost of $840.9 million during thirty-six week period ended May 9, 2015. On March 24, 2015, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.9 billion to $15.65 billion. Considering the cumulative repurchases as of May 9, 2015 the Company had $778.3 million remaining under the Board’s authorization to repurchase its common stock.
Share of treasury stock retired		2,100,000	3,200,000
Subsequent Event [Member]
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares					453,006
Repurchased shares of common stock at an aggregate cost					308,500,000
Retained Deficit [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		(1,050,000,000)	(1,220,000,000)
Additional Paid-In Capital [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		$ (57,400,000)	$ (74,000,000)