Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				12 Months Ended
	Jan. 31, 2022	Sep. 30, 2021	Dec. 31, 2020	Nov. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Aggregate purchase price of acquisitions					$ 393	$ 4,304
Repayments of long-term debt					$ 1,151	$ 2,297	$ 1,342
1.625% Convertible Notes
Business Acquisition [Line Items]
Stated interest rate				1.625%
Repayments of long-term debt				$ 864
2.25% Convertible Notes
Business Acquisition [Line Items]
Stated interest rate			2.25%			2.25%
Repayments of long-term debt			$ 576
Gauss
Business Acquisition [Line Items]
Aggregate purchase price of acquisitions		$ 120
Future regulatory and commercial milestones		$ 40
Wright
Business Acquisition [Line Items]
Aggregate purchase price of acquisitions				$ 4,100
Consideration transferred, price per share (in dollars per share)				$ 30.75
Purchase price of acquisitions, including convertible notes				$ 5,600
Vocera | Subsequent Event
Business Acquisition [Line Items]
Aggregate purchase price of acquisitions	$ 3,100
Consideration transferred, price per share (in dollars per share)	$ 79.25