Fair Value Measurements - Unobservable Input Reconciliation of Contingent Consideration Liability (Details) - Fair Value, Inputs, Level 3 - Contingent Consideration Liabilities - USD ($) $ in Millions	3 Months Ended
	Jul. 04, 2015	Apr. 04, 2015
Contingent Consideration Liability [Roll Forward]
Beginning balance	$ 27	$ 50
Change in fair value of contingent consideration	(18)	(23)
Initial fair value measurement of contingent consideration	155
Ending balance	164	27
Spinal Modulation
Contingent Consideration Liability [Roll Forward]
Beginning balance	0	0
Change in fair value of contingent consideration	5	0
Initial fair value measurement of contingent consideration	155
Ending balance	160	0
Nanostim
Contingent Consideration Liability [Roll Forward]
Beginning balance	27	50
Change in fair value of contingent consideration	(23)	(23)
Initial fair value measurement of contingent consideration	0
Ending balance	$ 4	$ 27