Business Combinations Business Combination (Schedule of Variable Interest Entities) (Details) (USD $) In Millions, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Jun. 07, 2013
Statement [Line Items]
Goodwill	$ 3,532	$ 3,524	$ 2,961
Spinal Modulation [Member]
Statement [Line Items]
Cash and cash equivalents	9			41
Other current assets	7
Goodwill	46			46
In-Process Research and Development	45			45
Other intangible assets	7			7
Business Combinations Total Assets Acquired, including Goodwill	114
Current liabilities	5			6
Deferred income taxes	19			19
Total liabilities	24
Noncontrolling interest	$ 45