Segment Information (Financial Information By Geographic Area) (Details) (USD $) In Thousands	3 Months Ended												12 Months Ended
	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Jan. 01, 2010	Oct. 02, 2009	Jun. 30, 2009	Mar. 31, 2009	Dec. 31, 2008	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Revenues	$ 2,723,295	$ 2,744,178	$ 2,558,016	$ 2,356,175	$ 2,343,033	$ 2,507,725	$ 2,586,974	$ 2,477,785	$ 2,552,547	$ 2,706,724	$ 2,975,452	$ 3,232,653	$ 10,381,664	$ 9,915,517	$ 11,467,376
Long-Lived Assets	284,633				215,032				240,350				284,633	215,032	240,350
United States [Member]
Revenues													6,435,078	6,969,264	7,362,752
Long-Lived Assets	169,914				122,551				159,451				169,914	122,551	159,451
Europe [Member]
Revenues													1,649,678	1,666,325	2,204,503
Long-Lived Assets	49,372				53,586				40,840				49,372	53,586	40,840
Canada [Member]
Revenues													1,656,487	989,298	1,597,568
Long-Lived Assets	42,496				21,859				23,564				42,496	21,859	23,564
Asia [Member]
Revenues													102,272	98,259	117,164
Long-Lived Assets	1,653				809				1,308				1,653	809	1,308
India [Member]
Revenues													103,842	54,413	64,929
Long-Lived Assets	16,831				13,372				11,821				16,831	13,372	11,821
Australia [Member]
Revenues													194,560	28,589	36,716
Long-Lived Assets	1,040				356				441				1,040	356	441
South America And Mexico [Member]
Revenues													109,520	10,149	12,173
Long-Lived Assets	1,533				821				1,063				1,533	821	1,063
Middle East And Africa [Member]
Revenues													130,227	99,220	71,571
Long-Lived Assets	$ 1,794				$ 1,678				$ 1,862				$ 1,794	$ 1,678	$ 1,862