Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	May 04, 2018	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 27, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Income tax expense (benefit)			$ 2,186	$ (5,701)	$ (105,987)	$ (14,129)
Effective tax rate (percent)			(10.00%)	10.10%	1259.70%	7.50%
Valuation allowance								$ 428,000
Net operating loss carryforwards			$ 345,000		$ 345,000
Deferred tax assets, discrete income tax benefit					110,000
Income tax receivable, net operating loss carryback related to the CARES act							$ 110,000
Percentage of tax receivable agreement paid to other holders of Amneal common units (percent)	85.00%
Liabilities under tax receivable agreement			$ 202,000		$ 202,000
Subsequent Event
Subsequent Event [Line Items]
Income tax receivable, amount refunded		$ 106,000
Income tax receivable, net operating loss carryback related to the CARES act		$ 110,000