CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 191	$ 70	$ (1,009)	$ (407)
Other comprehensive (loss) income
Foreign currency translation adjustment	(80)	20	(128)	(118)
Pension and postretirement benefit plan adjustments, net of income taxes	(1)	(1)	(1)	(2)
Other comprehensive (loss) income	(81)	19	(129)	(120)
Comprehensive income (loss)	110	89	(1,138)	(527)
Comprehensive income attributable to noncontrolling interest	(3)	(2)	(9)	(1)
Comprehensive income (loss) attributable to Bausch Health Companies Inc.	$ 107	$ 87	$ (1,147)	$ (528)