CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (48)	$ (2,579)
Other comprehensive income
Foreign currency translation adjustment	21	46
Pension and postretirement benefit plan adjustments, net of income taxes	0	0
Other comprehensive income	21	46
Comprehensive loss	(27)	(2,533)
Comprehensive loss (income) attributable to noncontrolling interest	(4)	(4)
Comprehensive loss attributable to Bausch Health Companies Inc.	$ (31)	$ (2,537)