Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 31, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	001-38485
Entity Registrant Name	Amneal Pharmaceuticals, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	32-0546926
Entity Address, Address Line One	Amneal Pharmaceuticals, Inc.
Entity Address, Address Line Two	400 Crossing Boulevard,
Entity Address, City or Town	Bridgewater
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08807
City Area Code	908
Local Phone Number	947-3120
Title of 12(b) Security	Class A Common Stock, par value $0.01 per share
Trading Symbol	AMRX
Security Exchange Name	NYSE
Entity Current Reporting	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001723128
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		147,539,347
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		152,116,890