Goodwill and Intangible Assets - Gross Carrying Amounts and Net Book Values of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,167,245	$ 3,292,501
Accumulated Amortization	(928,587)	(990,850)
Total	2,238,658	2,301,651
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount - Total Intangible Assets	3,167,245	3,431,827
Net Book Value - Total Intangible Assets	2,238,658	2,440,977
Acquired IPR&D assets
Indefinite-lived Intangible Assets [Line Items]
In-process research and development	0	139,326
Impairment of intangible assets	$ 136,100
Acquired developed technologies
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted- Average Useful Life (In years)	13 years 2 months 12 days
Gross Carrying Amount	$ 3,152,634	3,166,485
Accumulated Amortization	(913,976)	(864,834)
Total	$ 2,238,658	2,301,651
Manufacturing contracts
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted- Average Useful Life (In years)	0 years
Gross Carrying Amount	$ 11,728	12,025
Accumulated Amortization	(11,728)	(12,025)
Total	$ 0	0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted- Average Useful Life (In years)	0 years
Gross Carrying Amount	$ 2,883	2,890
Accumulated Amortization	(2,883)	(2,890)
Total	$ 0	0
Priority review voucher
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted- Average Useful Life (In years)	0 years
Gross Carrying Amount	$ 0	111,101
Accumulated Amortization	0	(111,101)
Total	0	$ 0
EU Marketing Authorization Of Sunosi
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 13,000