Business Combinations and Divestitures - Purchase Price Allocation of Identifiable Intangible Assets (Details) - Actelion $ in Millions	Jun. 16, 2017 USD ($)
Business Acquisition [Line Items]
Finite-lived and Indefinite-lived Intangible Assets Acquired	$ 25,010
In Process Research and Development [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired	780
Intellectual Property [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 24,230