Collaboration Arrangements Collaboration Arrangements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		6 Months Ended
	Dec. 31, 2010 Phase 1 [Member]	Dec. 31, 2012 Phase 2 [Member]	Dec. 28, 2013 Phase 3 [Member]	Dec. 28, 2013 Maximum [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaboration Agreement Payments Made	$ 9.0	$ 11.0
Milestone Payment No Longer Required To Be Made			25.0
Potential Milestone Payment				$ 93.0