Stock Repurchase Program (Details) (USD $)	1 Months Ended			6 Months Ended		169 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 07, 2012	Sep. 28, 2011	Feb. 11, 2012	Feb. 12, 2011	Feb. 11, 2012	Feb. 11, 2012 Retained deficit [Member]	Feb. 12, 2011 Retained deficit [Member]	Feb. 11, 2012 Additional Paid-in Capital [Member]	Feb. 12, 2011 Additional Paid-in Capital [Member]
Treasury stock retired, cost method							$ 1,319,600,000	$ 1,247,700,000	$ 72,500,000	$ 82,200,000
Stock Repurchase Program (Textual) [Abstract]
Stock Repurchased Authorized Value		11,150,000,000	10,400,000,000
Stock Repurchased During Period, Shares		26,240		1,455,046		128,800,000
Purchase of treasury stock		10,000,000		482,300,000		10,700,000,000
Remaining Value Authorized For Share Repurchases				486,400,000		486,400,000
Stock repurchase authorized during the period, value		750,000,000	750,000,000
Stock repurchase authorized amended value	$ 11,900,000,000		$ 11,150,000,000
Treasury stock acquired repurchase authorization				From January 1, 1998 to February 11, 2012, the Company has repurchased a total of 128.8 million shares at an aggregate cost of $10.7 billion, including 1,455,046 shares of its common stock at an aggregate cost of $482.3 million during the twenty-four week period ended February 11, 2012. On September 28, 2011, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $10.4 billion to $11.15 billion. Considering cumulative repurchases as of February 11, 2012, the Company had $486.4 million remaining under the Board’s authorization to repurchase its common stock. On March 7, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.15 billion to $11.9 billion. Subsequent to February 11, 2012, the Company has repurchased 26,240 shares of its common stock at an aggregate cost of $10.0 million.
Shares of treasury stock retired				4,900,000	6,600,000