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INCOME TAXES - Narrative (Details) € in Millions, $ in Millions, $ in Millions			12 Months Ended
	Nov. 08, 2022 EUR (€)	Aug. 08, 2017 USD ($)	Dec. 31, 2023 USD ($) subsidiary	Dec. 31, 2023 CAD ($) subsidiary	Dec. 31, 2022 USD ($)	Dec. 31, 2023 CAD ($)
Income Tax [Line Items]
Valuation allowance against deferred tax assets			$ 2,254		$ 2,023
Unrecognized tax benefits including interest and penalties			918		881
Portion of unrecognized tax benefits, if recognized, would affect the Company's effective tax rate			414		384
Unrecognized tax benefits, net increase for tax positions of current year			6		156
Unrecognized tax benefits, net increase for tax positions of prior years			31
Unrecognized tax benefits, net decrease for tax positions of prior years					203
Accrued interest and penalties related to unrecognized tax benefits			51		32
Net increase (decrease) recognized in interest and penalties			$ 19		(9)
Number of subsidiaries file federal income tax returns in Canada, U.S., and other foreign jurisdictions (or more) | subsidiary			1	1
Estimate of possible loss, income tax examination (up to)			$ 2,100
Possible decrease in unrecognized tax benefits realized in next twelve months			30
Tax Year 2013
Income Tax [Line Items]
Estimate of possible loss, income tax examination (up to)				$ 90
Canadian Federal and Provincial
Income Tax [Line Items]
Increase (decrease) in valuation allowance			231		(199)
Accumulated losses available for federal and provincial purposes			6,579		5,878
Unclaimed investment tax credits and research and development credits			28		27
Canadian Federal and Provincial | BHCI And Bausch + Lomb Corporate Canada
Income Tax [Line Items]
Valuation allowance against deferred tax assets			2,045
Canadian Federal and Provincial | BHCI
Income Tax [Line Items]
Valuation allowance against deferred tax assets					1,869
Canadian Federal and Provincial | Pooled Scientific Research and Experimental Development
Income Tax [Line Items]
Tax credit carryforward			192		188
United States - Federal
Income Tax [Line Items]
Accumulated losses available for federal and provincial purposes			491		241
Unclaimed investment tax credits and research and development credits			31		75
Ireland | Revenue Commissioners, Ireland
Income Tax [Line Items]
Accumulated losses available for federal and provincial purposes			$ 12,164		$ 10,691
Ireland | Australian Taxation Office
Income Tax [Line Items]
Estimate of possible loss, income tax examination (up to)		$ 117
Ireland | Tax Year 2012 | Canada Revenue Agency
Income Tax [Line Items]
Estimate of possible loss, income tax examination (up to)				$ 85
Ireland | Tax Year 2015 | Canada Revenue Agency
Income Tax [Line Items]
Reduction in NOLs						$ 21
Ireland | Tax Year 2016 | Canada Revenue Agency
Income Tax [Line Items]
Reduction in NOLs						23
Ireland | Tax Year 2017 | Canada Revenue Agency
Income Tax [Line Items]
Reduction in NOLs						26
Ireland | Tax Year 2018 | Canada Revenue Agency
Income Tax [Line Items]
Reduction in NOLs						$ 15
Luxembourg | Tax Year 2018 and 2019
Income Tax [Line Items]
Estimate of possible loss, income tax examination (up to) | €	€ 271.7

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