CREDIT FACILITIES - Narrative (Details) - USD ($)	Jun. 30, 2023	May 10, 2022	Aug. 02, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Weighted average interest rate	8.51%			7.84%
XIIDRA® and Certain Other Ophthalmology Assets Acquisition
Debt Instrument [Line Items]
Expected up-front payment	$ 1,750,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Minimum aggregate amount of loans outstanding of total commitments, percent		40.00%
Maximum first lien net leverage ratio		4.50
Maximum total leverage ratio		4.00
Maximum total leverage ratio two, if circumstances met		4.50
Minimum interest coverage ratio		3.00
Term Loan Due May 2027
Debt Instrument [Line Items]
Debt, principal amount		$ 2,500,000,000
Term		5 years
Principal amount outstanding	2,475,000,000			$ 2,488,000,000
Long-term debt	$ 2,429,000,000			$ 2,436,000,000
Debt, interest rate	8.59%
Annual amortization rate (as a percent)		1.00%
Quarterly amortization payments		$ 25,000,000
Remaining quarterly amortization payments	$ 94,000,000
Term Loan Due May 2027 | SOFR, CDOR, EURIBOR and SONIA Rates | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.015%
Term Loan Due May 2027 | SOFR, CDOR, EURIBOR and SONIA Rates | Maximum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.475%
Term Loan Due May 2027 | U.S. Dollar Base Rate and Canadian Dollar Prime Rate | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		0.015%
Term Loan Due May 2027 | U.S. Dollar Base Rate and Canadian Dollar Prime Rate | Maximum
Debt Instrument [Line Items]
Variable rate (as a percent)		0.475%
Term Loan Due May 2027 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Variable rate (as a percent)		3.25%
Credit spread adjustment (as a percent)		0.10%
Term Loan Due May 2027 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		0.50%
Term Loan Due May 2027 | Base Rate
Debt Instrument [Line Items]
Variable rate (as a percent)		2.25%
Term Loan Due May 2027 | Base Rate | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.50%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility
Debt Instrument [Line Items]
Term		5 years
Maximum borrowing capacity		$ 500,000,000
Principal amount outstanding	200,000,000
Remaining borrowings	$ 275,000,000
Facility fee (as a percent)		0.25%
Percentage of net cash proceeds of insurance and condemnation proceeds for property or asset losses		100.00%
Percentage of cash proceeds from incurrence of debt		100.00%
Percentage of annual excess cash flow		50.00%
Percentage of cash proceeds from asset sales outside the ordinary course of business payable as mandatory prepayments		100.00%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Principal amount outstanding			$ 250,000,000
Remaining borrowings			225,000,000
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt, interest rate	7.43%
Commitment fee (as a percent)		0.11%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt, interest rate	7.50%
Commitment fee (as a percent)		0.275%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | SOFR, CDOR, EURIBOR and SONIA Rates
Debt Instrument [Line Items]
Variable rate (as a percent)		0.00%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | SOFR, CDOR, EURIBOR and SONIA Rates | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.75%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | SOFR, CDOR, EURIBOR and SONIA Rates | Maximum
Debt Instrument [Line Items]
Variable rate (as a percent)		2.75%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | U.S. Dollar Base Rate and Canadian Dollar Prime Rate
Debt Instrument [Line Items]
Variable rate (as a percent)		1.00%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | U.S. Dollar Base Rate and Canadian Dollar Prime Rate | Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		0.75%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | U.S. Dollar Base Rate and Canadian Dollar Prime Rate | Maximum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.75%
Revolving Credit Facility Due May 2027 | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Credit spread adjustment (as a percent)		0.10%
Revolving Credit Facility Due May 2027 | Letter of Credit
Debt Instrument [Line Items]
Long-term debt	$ 25,000,000
Revolving Credit Facility Due May 2027 | Letter of Credit | Subsequent Event
Debt Instrument [Line Items]
Long-term debt			$ 25,000,000