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Business Combinations Business Combinations (Narrative) (Details) (CardioMEMS, Inc. [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Jan. 01, 2011
CardioMEMS, Inc. [Member]
Business Acquisition Purchase Price Allocation Indefinite-Lived In Process Research And Development	$ 69
Equity Security Ownership Interest And Allocated Value For Purchase Option		60
Equity Security Ownership Interest		19.00%
Additional Payment For Acquisition At Company Option		375
Cost-method Investments, Other than Temporary Impairment	29
Variable Interest Entity, Financial or Other Support, Amount	28
variable interest entity, potential future financial or other support, amount	$ 12

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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