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Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			3 Months Ended		9 Months Ended
	Mar. 31, 2019	Aug. 31, 2018	Feb. 28, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Acquisitions, net of cash acquired						$ 281	$ 770
Acquisition and integration-related charges				$ 32	$ 8	223	$ 49
Goodwill				$ 8,704		$ 8,704		$ 8,563
OrthoSpace, Ltd.
Business Acquisition [Line Items]
Acquisitions, net of cash acquired	$ 110
Future milestone payments	110
Goodwill	$ 114
K2M
Business Acquisition [Line Items]
Acquisitions, net of cash acquired		$ 1,380
Goodwill								794
Consideration transferred (in dollars per share)		$ 27.50
Entellus
Business Acquisition [Line Items]
Acquisitions, net of cash acquired			$ 697
Goodwill								$ 465
Consideration transferred (in dollars per share)			$ 24.00

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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