Subsequent Event Subsequent Event (Details) (USD $) In Millions, unless otherwise specified				3 Months Ended		3 Months Ended		3 Months Ended
	May 03, 2013	May 02, 2013	Mar. 30, 2013	Mar. 30, 2013 Three point twenty-five percent Senior Notes Due Two Thousand Twenty-three [Member]	Apr. 02, 2013 Three point twenty-five percent Senior Notes Due Two Thousand Twenty-three [Member] Y	Mar. 30, 2013 Four point seventy-five percent Senior Notes Due Two Thousand Fourty-three [Member] [Member]	Apr. 02, 2013 Four point seventy-five percent Senior Notes Due Two Thousand Fourty-three [Member] [Member] Y	Mar. 30, 2013 3.75% Senior Notes Due 2014 [Member] Y	Mar. 30, 2013 4.875% Senior Notes Due Two Thousand Nineteen [Member] Y
Debt Instrument, Face Amount					$ 900		$ 700	$ 700	$ 500
Debt instrument term, years					10		30	5	10
Debt instrument, stated percentage rate					3.25%		4.75%	3.75%	4.875%
Debt Instrument, Maturity Date Range, End				Apr. 15, 2023		Apr. 15, 2043		Jul. 15, 2014	Jul. 15, 2019
Debt instrument, effective interest rate					3.31%		4.79%	3.78%	5.04%
make-whole redemption payment		160
Expected minimum principal payments in 2013	519		519
Expected minimum principal payments in 2015	900		900
Expected minimum principal payments in 2016	500		500
Expected minimum principal payments in 2017	86		86
Expected minimum principal payments thereafter	$ 1,735		$ 635