Stock Repurchase Program - Additional Information (Detail) (USD $)	9 Months Ended		196 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 10, 2014 Subsequent Event [Member]	Dec. 17, 2013 Minimum [Member]	Jun. 17, 2014 Minimum [Member] Subsequent Event [Member]	Dec. 17, 2013 Maximum [Member]	Jun. 17, 2014 Maximum [Member] Subsequent Event [Member]	May 10, 2014 Retained Deficit [Member]	May 04, 2013 Retained Deficit [Member]	May 10, 2014 Additional Paid-In Capital [Member]	May 04, 2013 Additional Paid-In Capital [Member]
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares			136,500,000
Purchase of treasury stock			$ 13,843,000,000
Stock repurchased during period, shares	1,876,659			84,400
Stock repurchased during period, amount	911,500,000			44,400,000
Stock repurchase authorized during the period, value							750,000,000	750,000,000
Stock repurchase authorized amended value					13,400,000,000	14,150,000,000	14,150,000,000	14,900,000,000
Remaining value authorized for share repurchases	306,900,000		306,900,000	1,013,000,000
Treasury stock acquired repurchase authorization	From January 1, 1998 to May 10, 2014, the Company has repurchased a total of 136.5 million shares at an aggregate cost of $13,843 billion, including 1,876,659 shares of its common stock at an aggregate cost of $911.5 million during thirty-six week period ended May 10, 2014. On December 17, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $13.4 billion to $14.15 billion. Considering the cumulative repurchases as of May 10, 2014, the Company had $306.9 million remaining under the Board’s authorization to repurchase its common stock.
Share of treasury stock retired	3,200,000	3,900,000
Treasury stock retired, cost method									$ 1,220,000,000	$ 1,362,000,000	$ 74,000,000	$ 75,700,000