Benefit Plans (Details) In Thousands	6 Months Ended
	Jul. 01, 2011
Summary of share-based award activity
Balance at December 31, 2010	10,449
Options granted	(833)
Restricted stock units granted	(2,469)
Options cancelled	384
Restricted stock units cancelled	591
Options expired	40
Balance at July 1, 2011	8,162