Income Taxes - Additional Information (Details) $ in Thousands		3 Months Ended		10 Months Ended	12 Months Ended
	Nov. 07, 2023	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Nov. 06, 2023	Dec. 31, 2019 USD ($)	Dec. 31, 2018	Dec. 31, 2023 USD ($)
Income Tax Disclosure [Abstract]
Income tax expense (benefit)		$ 6,156	$ 668
Effective tax rate (percent)		(8.20%)	(7.10%)
Valuation allowance		$ 566,000					$ 566,500
Tax receivable agreement, payment ratio						0.01
Percentage of tax receivable agreement paid to other holders of Amneal common units (percent)	75.00%			85.00%		85.00%
Reversal of accrued tax receivable agreement liability					$ 192,800
Liabilities recorded under tax receivable agreement		185,000					185,000
Tax receivable agreement liability		5,700					$ 3,800
Increase in tax receivable agreement liability		$ 1,948	$ 826