Contract with the U.K. National Health Service (Details) In Millions, unless otherwise specified	0 Months Ended				3 Months Ended
	Mar. 28, 2013 USD ($)	Mar. 28, 2013 GBP (£)	Aug. 31, 2012 USD ($)	Aug. 31, 2012 GBP (£)	Dec. 30, 2011 USD ($)	Jan. 02, 2015 USD ($)	Oct. 04, 2013 USD ($)	Oct. 04, 2013 GBP (£)	Oct. 04, 2013 Minimum [Member] USD ($)	Oct. 04, 2013 Minimum [Member] GBP (£)	Oct. 04, 2013 Maximum [Member] USD ($)	Oct. 04, 2013 Maximum [Member] GBP (£)
Contracts Receivable [Abstract]
U.K. National Health (NHS) current contract							$ 75.0	£ 47.5
Contract Modification, Aggregate Voluntary Decommision Limit							31.0	19.6
Contract Modification, Voluntary Decommission Limit, Certain Products									0.3	0.2	6.9	4.4
Change in accounting estimate, reduction in operating income					1,500
Contract modification, total consideration to be received			120	78
Contract modification, amount held in escrow			15	10
Contract Modification, Deferred Costs						18
Proceed to settle disputed amounts, net of VAT	15	10	105	68
Contract Modification, Deferred Revenues						$ 166