CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ (DEFICIT) EQUITY - USD ($) $ in Millions	Total	Bausch Health Companies Inc. Shareholders’ Deficit	Common Shares	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Non- controlling Interest
Beginning Balance (in shares) at Dec. 31, 2021			359,400,000
Beginning Balance at Dec. 31, 2021	$ (34)	$ (106)	$ 10,317	$ 462	$ (8,961)	$ (1,924)	$ 72
Increase (Decrease) in Shareholders' Equity
Proceeds from B+L initial public offering, net of costs (Note 2)	675	(190)		(327)		137	865
Common shares issued under share-based compensation plans (in shares)			2,400,000
Common shares issued under share-based compensation plans	3	3	$ 70	(67)
Share-based compensation	91	91		91
Employee withholding taxes related to share-based awards	(30)	(30)		(30)
Noncontrolling interest distributions	(11)						(11)
Net (loss) income	198	185			185		13
Other comprehensive (loss) income	(459)	(478)				(478)	19
Ending Balance (in shares) at Sep. 30, 2022			361,800,000
Ending Balance at Sep. 30, 2022	433	(525)	$ 10,387	129	(8,776)	(2,265)	958
Beginning Balance (in shares) at Jun. 30, 2022			361,600,000
Beginning Balance at Jun. 30, 2022	253	(693)	$ 10,380	104	(9,175)	(2,002)	946
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)			200,000
Common shares issued under share-based compensation plans	0		$ 7	(7)
Share-based compensation	33	33		33
Employee withholding taxes related to share-based awards	(1)	(1)		(1)
Noncontrolling interest distributions	(11)						(11)
Net (loss) income	403	399			399		4
Other comprehensive (loss) income	(244)	(263)				(263)	19
Ending Balance (in shares) at Sep. 30, 2022			361,800,000
Ending Balance at Sep. 30, 2022	$ 433	(525)	$ 10,387	129	(8,776)	(2,265)	958
Beginning Balance (in shares) at Dec. 31, 2022	361,898,846		361,900,000
Beginning Balance at Dec. 31, 2022	$ 260	(692)	$ 10,391	159	(9,186)	(2,056)	952
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)			3,100,000
Common shares issued under share-based compensation plans	0		$ 29	(29)
Share-based compensation	103	103		103
Employee withholding taxes related to share-based awards	(23)	(23)		(23)
Vesting of B+L equity compensation	0	(20)		(20)			20
Noncontrolling interest distributions	(9)						(9)
Net (loss) income	(564)	(553)			(553)		(11)
Other comprehensive (loss) income	$ (2)	5				5	(7)
Ending Balance (in shares) at Sep. 30, 2023	365,043,317		365,000,000.0
Ending Balance at Sep. 30, 2023	$ (235)	(1,180)	$ 10,420	190	(9,739)	(2,051)	945
Beginning Balance (in shares) at Jun. 30, 2023			364,000,000.0
Beginning Balance at Jun. 30, 2023	271	(663)	$ 10,412	188	(9,361)	(1,902)	934
Increase (Decrease) in Shareholders' Equity
Common shares issued under share-based compensation plans (in shares)			1,000,000.0
Common shares issued under share-based compensation plans	0		$ 8	(8)
Share-based compensation	29	29		29
Employee withholding taxes related to share-based awards	(8)	(8)		(8)
Vesting of B+L equity compensation	0	(11)		(11)			11
Noncontrolling interest distributions	(9)						(9)
Net (loss) income	(382)	(378)			(378)		(4)
Other comprehensive (loss) income	$ (136)	(149)				(149)	13
Ending Balance (in shares) at Sep. 30, 2023	365,043,317		365,000,000.0
Ending Balance at Sep. 30, 2023	$ (235)	$ (1,180)	$ 10,420	$ 190	$ (9,739)	$ (2,051)	$ 945