Contract with the U.K. National Health Service (Details) In Millions, unless otherwise specified	0 Months Ended							3 Months Ended	36 Months Ended
	Mar. 27, 2013 USD ($)	Mar. 27, 2013 GBP (£)	Aug. 31, 2012 USD ($)	Aug. 31, 2012 GBP (£)	Mar. 28, 2014 USD ($)	Oct. 04, 2013 USD ($)	Oct. 04, 2013 GBP (£)	Apr. 01, 2011 NHS contract [Member] Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] USD ($)	Apr. 01, 2011 NHS contract [Member] Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] USD ($)	Oct. 04, 2013 Minimum USD ($)	Oct. 04, 2013 Minimum GBP (£)	Oct. 04, 2013 Maximum USD ($)	Oct. 04, 2013 Maximum GBP (£)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Change in accounting estimate, reduction in operating income								$ 1,158	$ 129
Contract Modification, Total Consideration To Be Received			126	78
Proceeds from Customers to Settle Disputed Amounts, Net of Value Added Tax	15	10	110	68
Contract Modification, Amount Held in Escrow			16	10
Deferred Costs					14
Deferred Revenue					184
U.K. National Health (NHS) current contract value						75.0	47.5
Contract Modification, Aggregate Voluntary Decommision Limit						31.0	19.6
Contract Modification, Voluntary Decommision Limit, Certain Products										$ 0.3	£ 0.2	$ 6.9	£ 4.4