Product And Geographic Information (Revenue from External Customers by Products and Services) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,439	$ 1,372	$ 1,448	$ 1,363	$ 1,422	$ 1,338	$ 1,403	$ 1,338	$ 5,622	$ 5,501	$ 5,503
ICD Systems [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,746	1,741	1,743
Pacemaker Systems [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,047	1,042	1,111
Atrial Fibrillation Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,044	957	898
Vascular Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									709	704	716
Structural Heart Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									639	631	612
Neuromodulation Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 437	$ 426	$ 423