CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Shares	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Bausch Health Companies Inc. Shareholders' Equity	Noncontrolling Interest
Beginning Balance (in shares) at Dec. 31, 2017		348,700,000.0
Beginning Balance at Dec. 31, 2017	$ 5,944	$ 10,090	$ 380	$ (2,725)	$ (1,896)	$ 5,849	$ 95
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)		500,000.0
Common shares issued under share-based compensation plans		$ 13	(13)
Share-based compensation	21		21			21
Employee withholding taxes related to share-based awards	(6)		(6)			(6)
Net (loss) income	(2,579)			(2,581)		(2,581)	2
Other comprehensive income	46				44	44	2
Ending Balance (in shares) at Mar. 31, 2018		349,200,000.0
Ending Balance at Mar. 31, 2018	$ 4,635	$ 10,103	382	(4,097)	(1,852)	4,536	99
Beginning Balance (in shares) at Dec. 31, 2018	349,871,102	349,900,000.0
Beginning Balance at Dec. 31, 2018	$ 2,815	$ 10,121	413	(5,664)	(2,137)	2,733	82
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)		2,000,000
Common shares issued under share-based compensation plans	1	$ 30	(29)			1
Share-based compensation	24		24			24
Employee withholding taxes related to share-based awards	(34)		(34)			(34)
Net (loss) income	(48)			(52)		(52)	4
Other comprehensive income	$ 21				21	21
Ending Balance (in shares) at Mar. 31, 2019	351,873,984	351,900,000.0
Ending Balance at Mar. 31, 2019	$ 2,779	$ 10,151	$ 374	$ (5,716)	$ (2,116)	$ 2,693	$ 86