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Acquisitions (Narrative) (Details) $ / shares in Units, $ in Millions			1 Months Ended					12 Months Ended
	Dec. 13, 2019 $ / shares	Dec. 13, 2019 € / shares	Nov. 30, 2019 USD ($) $ / shares	Oct. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Nov. 30, 2018 USD ($) $ / shares	Feb. 28, 2018 USD ($) $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Acquisitions, net of cash acquired								$ 802	$ 2,451	$ 831
Business Combination, Consideration Transferred								$ 1,096
Mobius
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				$ 360
Future regulatory and commercial milestones				$ 130
OrthoSpace, Ltd.
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					$ 110
Future regulatory and commercial milestones					$ 110
K2M
Business Acquisition [Line Items]
Acquisitions, net of cash acquired						$ 1,380
Consideration transfered, price per share (in dollars per share) | $ / shares						$ 27.50
Entellus
Business Acquisition [Line Items]
Acquisitions, net of cash acquired							$ 697
Consideration transfered, price per share (in dollars per share) | $ / shares							$ 24.00
Wright
Business Acquisition [Line Items]
Acquisitions, net of cash acquired			$ 5,400
Consideration transfered, price per share (in dollars per share) | $ / shares	$ 30.75		$ 30.75
Par value of ordinary shares of acquiree (in dollars per share) | € / shares		€ 0.03

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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