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, 2018		349,900,000
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)		2,000,000.0
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 (loss)	21				21	21	0
Ending Balance (in shares) at Mar. 31, 2019		351,900,000
Ending Balance at Mar. 31, 2019	$ 2,779	$ 10,151	374	(5,716)	(2,116)	2,693	86
Beginning Balance (in shares) at Dec. 31, 2019	352,562,636	352,600,000
Beginning Balance at Dec. 31, 2019	$ 1,136	$ 10,172	429	(7,452)	(2,086)	1,063	73
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)		2,000,000.0
Common shares issued under share-based compensation plans	1	$ 37	(36)			1
Share-based compensation	27		27			27
Employee withholding taxes related to share-based awards	(24)		(24)			(24)
Net (loss) income	(152)			(152)		(152)	0
Other comprehensive Income (loss)	$ (197)				(195)	(195)	(2)
Ending Balance (in shares) at Mar. 31, 2020	354,579,990	354,600,000
Ending Balance at Mar. 31, 2020	$ 790	$ 10,209	$ 396	$ (7,605)	$ (2,281)	$ 719	$ 71