Equity (Narrative) (Details) (USD $) Share data in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Apr. 03, 2010	Apr. 23, 2010	Oct. 01, 2011	Oct. 02, 2010	Jan. 01, 2011
Equity [Abstract]
Anti-dilutive potential common shares excluded from reconciliation	5	9			4	4
Shares issued to employees and directors under various benefit plans and stock purchase programs					0.4
Share repurchase program, authorized amount				$ 2,500,000,000
Common stock repurchases shares					13	18
Common stock repurchases value					688,000,000	907,000,000	1,057,000,000
Decrease of deferred tax asset, included in tax expense			17,000,000
Common stock repurchases paid					$ 693,000,000	$ 907,000,000