Special Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 03, 2015	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Restructuring Cost and Reserve [Line Items]
Purchased technology and patents				$ 12
Field Action Costs [Member]
Restructuring Cost and Reserve [Line Items]
Loss Contingency, Loss in Period				27
Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		58	29
Litigation Settlement, Amount		37	22	28
Operating Expense [Member] | Field Action Costs [Member]
Restructuring Cost and Reserve [Line Items]
Legal Fees		31	28	16
Cost of Sales [Member] | Field Action Costs [Member]
Restructuring Cost and Reserve [Line Items]
Loss Contingency, Loss in Period	(4)	23	10	25
Purchased Technology And Patents [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Litigation Settlement, Amount		(48)
Developed Technology Rights [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Intangible asset impairment charges, Finite-lived				31
Customer-Related Intangible Assets [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Intangible asset impairment charges, Finite-lived			13	2
In Process Research and Development [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		50	15
Trade Names [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		8	14
Manuf and Supply Optimization Plan [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		32
Restructuring and Related Cost, Expected Cost Remaining	45	45
Manuf and Supply Optimization Plan [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		25
Manuf and Supply Optimization Plan [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		7
Manuf and Supply Optimization Plan [Member] | Other Restructuring [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		8
Manuf and Supply Optimization Plan [Member] | Other Restructuring [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		0
2012 Business Realignment Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		108	220	185
Restructuring and Related Cost, Expected Cost Remaining	6	6
2012 Business Realignment Restructuring Plan [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		78	185	161
2012 Business Realignment Restructuring Plan [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		30	35	24
2012 Business Realignment Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		36	102	18
2012 Business Realignment Restructuring Plan [Member] | Other Restructuring [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		35	97	16
2012 Business Realignment Restructuring Plan [Member] | Other Restructuring [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		1	5	2
2012 Business Realignment Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		22	64	7
2012 Business Realignment Restructuring Plan [Member] | Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense			38	11
2012 Business Realignment Restructuring Plan [Member] | Research agreement termination cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense			23
2012 Business Realignment Restructuring Plan [Member] | Discontinuation of a clinical trial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		10
2012 Business Realignment Restructuring Plan [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense		4
2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Special charges			24	102
2011 Restructuring Plan [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Special charges			24	58
2011 Restructuring Plan [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Special charges				44
2011 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense				51
2011 Restructuring Plan [Member] | Other Restructuring [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense			18	31
2011 Restructuring Plan [Member] | Other Restructuring [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense				20
2011 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense				8
2011 Restructuring Plan [Member] | Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense				6
2011 Restructuring Plan [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Severance And Benefit Costs Number Of Employees Impacted For Exit and Disposal Activities				650
Severance and benefits costs, number of employees impacted				550
Restructuring reserve period expense				13
2011 Restructuring Plan [Member] | Cardiac rhythm management business and selling organization restructuring initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve period expense				$ 37