CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 70	$ (48)	$ (407)	$ (266)
Other comprehensive income (loss)
Foreign currency translation adjustment	20	(97)	(118)	(20)
Pension and postretirement benefit plan adjustments, net of income taxes	(1)	0	(2)	(1)
Other comprehensive income (loss)	19	(97)	(120)	(21)
Comprehensive income (loss)	89	(145)	(527)	(287)
Comprehensive (income) loss attributable to noncontrolling interest	(2)	1	(1)	(4)
Comprehensive income (loss) attributable to Bausch Health Companies Inc.	$ 87	$ (144)	$ (528)	$ (291)