Equity (Details) (USD $)	1 Months Ended		3 Months Ended
	May 07, 2012	Apr. 24, 2012	Mar. 30, 2012	Apr. 01, 2011	Apr. 26, 2011
Equity (Textual)
Additional amount of shares authorized to be repurchased					$ 1,500,000,000
Number of common shares repurchased	1,030,879		2,000,000
Average price per share of repurchased shares	$ 69.68		$ 69.45
Aggregate amount of repurchased shares	72,000,000		138,000,000	205,000,000
Remaining value under share repurchase program			$ 995,000,000
Cash dividend, declared per share		$ 0.50