Earnings (Loss) Per Common Share (Impact Of Company's Stock Price On Assuming Dilution Calculation For The Senior Convertible Notes) (Details) (1.00% Senior Convertible Notes Due 2012 [Member], USD $)	9 Months Ended
	Sep. 28, 2012
$83.93 [Member]
Share price	$ 83.93
Incremental common shares attributable to contingently issuable shares	0
$93.93 [Member]
Share price	$ 93.93
Incremental common shares attributable to contingently issuable shares	13,425
$103.93 [Member]
Share price	$ 103.93
Incremental common shares attributable to contingently issuable shares	24,271
$113.93 [Member]
Share price	$ 113.93
Incremental common shares attributable to contingently issuable shares	33,213
$123.93 [Member]
Share price	$ 123.93
Incremental common shares attributable to contingently issuable shares	40,712
$133.93 [Member]
Share price	$ 133.93
Incremental common shares attributable to contingently issuable shares	47,091
Total Treasury Method Incremental Shares [Member] | $83.93 [Member]
Incremental common shares attributable to contingently issuable shares	0	[1]
Total Treasury Method Incremental Shares [Member] | $93.93 [Member]
Incremental common shares attributable to contingently issuable shares	13,425	[1]
Total Treasury Method Incremental Shares [Member] | $103.93 [Member]
Incremental common shares attributable to contingently issuable shares	24,271	[1]
Total Treasury Method Incremental Shares [Member] | $113.93 [Member]
Incremental common shares attributable to contingently issuable shares	33,213	[1]
Total Treasury Method Incremental Shares [Member] | $123.93 [Member]
Incremental common shares attributable to contingently issuable shares	40,712	[1]
Total Treasury Method Incremental Shares [Member] | $133.93 [Member]
Incremental common shares attributable to contingently issuable shares	47,091	[1]

[1] Represents the number of incremental shares that must be included in the calculation of fully diluted shares under GAAP.