INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Amount of Goodwill (Details) - USD ($)		3 Months Ended	12 Months Ended
Mar. 01, 2021	Mar. 31, 2021	Dec. 31, 2020
Change in the carrying amount of goodwill
Balance at the beginning of the period		$ 13,044,000,000	$ 13,126,000,000
Assets held for sale reclassified to goodwill			18,000,000
Goodwill reclassified to assets held for sale (Note 4)			(217,000,000)
Realignment of segment goodwill		0
Impairment	$ 0	(469,000,000)
Foreign exchange and other		(90,000,000)	117,000,000
Balance at the end of the period		12,485,000,000	13,044,000,000
Bausch + Lomb/ International
Change in the carrying amount of goodwill
Balance at the beginning of the period		5,704,000,000	5,786,000,000
Assets held for sale reclassified to goodwill			18,000,000
Goodwill reclassified to assets held for sale (Note 4)			(217,000,000)
Realignment of segment goodwill		(5,704,000,000)
Impairment		0
Foreign exchange and other		0	117,000,000
Balance at the end of the period		0	5,704,000,000
Bausch + Lomb
Change in the carrying amount of goodwill
Realignment of segment goodwill		5,395,000,000
Foreign exchange and other		(47,000,000)
Balance at the end of the period		5,348,000,000
Salix
Change in the carrying amount of goodwill
Balance at the beginning of the period		3,159,000,000	3,159,000,000
Balance at the end of the period		3,159,000,000	3,159,000,000
International Rx
Change in the carrying amount of goodwill
Balance at the beginning of the period		0	0
Realignment of segment goodwill		887,000,000
Foreign exchange and other		(43,000,000)
Balance at the end of the period		844,000,000	0
Ortho Dermatologics
Change in the carrying amount of goodwill
Balance at the beginning of the period		1,267,000,000	1,267,000,000
Impairment		(469,000,000)
Balance at the end of the period		798,000,000	1,267,000,000
Diversified Products
Change in the carrying amount of goodwill
Balance at the beginning of the period		2,914,000,000	2,914,000,000
Realignment of segment goodwill		(578,000,000)
Balance at the end of the period		$ 2,336,000,000	$ 2,914,000,000

Goodwill, Transfers Related To Sale of Business Unit

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(10)(1))
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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