Acquisitions and Strategic Investments (Tables)

3 Months Ended

Mar. 31, 2018

Business Acquisition [Line Items]

Investment [Table Text Block]

The aggregate carrying amount of our strategic investments were comprised of the following categories:

	As of
(in millions)	March 31, 2018		December 31, 2017
Equity method investments	$	304	$	209
Measurement alternative investments	84		81
Publicly-held securities	12		15
Notes receivable	43		47
	$	442	$	353

Rollforward of Fair Value of Contingent Consideration [Table Text Block]

Changes in the fair value of our contingent consideration liabilities were as follows (in millions):

Balance as of December 31, 2017	$	169
Amounts recorded related to prior acquisitions	(22		)
Fair value adjustment	5
Balance as of March 31, 2018	$	152

Description of unobservable inputs used in Level 3 fair value measurements [Table Text Block]

The recurring Level 3 fair value measurements of our contingent consideration liabilities include the following significant unobservable inputs:

Contingent Consideration Liabilities	Fair Value as of March 31, 2018	Valuation Technique	Unobservable Input	Range
R&D and Commercialization-based Milestones	$105 million	Discounted Cash Flow	Discount Rate	3%
			Probability of Payment	17% - 100%
			Projected Year of Payment	2018 - 2022
Revenue-based Payments	$48 million	Discounted Cash Flow	Discount Rate	11% - 15%
			Projected Year of Payment	2018 - 2026