Other Financial Data (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended			9 Months Ended
	Jul. 24, 2013	Sep. 28, 2013	Jun. 29, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 31, 2012	Dec. 31, 2011
Other Financial Data [Line Items]
Reclassified amount of of cash surrender values of split-dollar value life insurance plans		$ 96,000,000			$ 96,000,000
Cash and cash equivalents		1,721,000,000		1,779,000,000	1,721,000,000	1,779,000,000	1,468,000,000	1,881,000,000
Restricted cash and cash equivalents		63,000,000			63,000,000
Depreciation expense		51,000,000		39,000,000	148,000,000	133,000,000
Stockholders' Equity Note [Abstract]
Repurchase of common shares, value					1,300,000,000	2,100,000,000
Repurchase of common shares					23.0	37.1
Repurchase of common shares, average cost per share					$ 58.05	$ 48.50
Additional funds authorized under share repurchase program	2,000,000,000
Aggregate amount authorized under share repurchase program	7,000,000,000
Share repurchase authority utilized during period					4,900,000,000
Share repurchase program, available for repurchases					2,100,000,000
Payments for Repurchase of Common Stock					1,332,000,000	2,112,000,000
Payment of dividends					$ 212,000,000	$ 197,000,000
Dividends declared per share (US$ per share)	$ 0.31	$ 0.31	$ 0.26	$ 0.26	$ 0.83	$ 0.70
Stock Options [Member]
Other Financial Data [Line Items]
Stock options excluded from computation of dilutive shares due to antidilutive nature		5.6		6.1	4.8	6.0