Acquisitions, Goodwill, and Acquired Intangible Assets - Acquired Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	$ 5,333	$ 5,270
Accumulated amortization	(1,495)	(1,249)
Acquired finite-lived intangible assets, net	3,838	4,021
Acquired indefinite-lived intangible assets - IPR&D and other	1,143	28
Acquired Intangibles, Gross	6,476	5,298
Acquired Intangibles, Net	$ 4,981	4,049
Weighted Average Life Remaining	14 years 4 months 24 days
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated useful life	1 year
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated useful life	25 years
Marketing-related
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	$ 2,289	2,303
Accumulated amortization	(445)	(340)
Acquired finite-lived intangible assets, net	$ 1,844	1,963
Weighted Average Life Remaining	20 years
Contract-based
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	$ 1,917	1,680
Accumulated amortization	(418)	(302)
Acquired finite-lived intangible assets, net	$ 1,499	1,378
Weighted Average Life Remaining	11 years
Technology- and content-based
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	$ 948	1,005
Accumulated amortization	(555)	(477)
Acquired finite-lived intangible assets, net	$ 393	528
Weighted Average Life Remaining	3 years 3 months 18 days
Customer-related
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	$ 179	282
Accumulated amortization	(77)	(130)
Acquired finite-lived intangible assets, net	$ 102	$ 152
Weighted Average Life Remaining	4 years