CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (325)	$ (170)	$ (477)	$ (218)
Other comprehensive income (loss)
Foreign currency translation adjustment	54	56	(138)	77
Pension and postretirement benefit plan adjustments, net of income taxes	4	(1)	(1)	(1)
Other comprehensive income (loss)	58	55	(139)	76
Comprehensive loss	(267)	(115)	(616)	(142)
Comprehensive (income) loss attributable to noncontrolling interest	(1)	(1)	1	(5)
Comprehensive loss attributable to Bausch Health Companies Inc.	$ (268)	$ (116)	$ (615)	$ (147)