General (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Sep. 30, 2011	Oct. 01, 2010
General
Net earnings	$ 523,428,000	$ 646,435,000	$ 1,601,550,000	$ 1,319,144,000
Change in foreign currency translation adjustment	(490,900,000)	(370,700,000)	(125,200,000)	6,300,000
Change in unrealized (loss) gain on available-for-sale securities, net of income taxes	(61,800,000)	44,300,000	(35,100,000)	18,700,000
Comprehensive (loss) income	$ (29,300,000)	$ 320,000,000	$ 1,441,300,000	$ 1,344,100,000
Qualitative assessment on goodwill impairment, likelihood percentage			more than 50 percent