SEGMENT RESULTS - Schedule of Reportable Segments Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			4
Total net revenues from external customers	$ 772,028	$ 634,860	$ 2,203,777	$ 2,142,853
Total segment adjusted income (loss) from continuing operations before income tax	428,923	308,117	1,166,572	1,089,584
Branded Pharmaceuticals
Segment Reporting Information [Line Items]
Total net revenues from external customers	230,977	223,682	665,652	557,276
Total segment adjusted income (loss) from continuing operations before income tax	105,849	120,368	301,277	267,964
Sterile Injectables
Segment Reporting Information [Line Items]
Total net revenues from external customers	343,653	251,393	946,998	906,997
Total segment adjusted income (loss) from continuing operations before income tax	282,300	190,498	751,922	696,147
Generic Pharmaceuticals
Segment Reporting Information [Line Items]
Total net revenues from external customers	174,306	135,508	522,451	602,670
Total segment adjusted income (loss) from continuing operations before income tax	34,010	(13,428)	89,036	91,293
International Pharmaceuticals
Segment Reporting Information [Line Items]
Total net revenues from external customers	23,092	24,277	68,676	75,910
Total segment adjusted income (loss) from continuing operations before income tax	$ 6,764	$ 10,679	$ 24,337	$ 34,180