FINANCING ARRANGEMENTS - Senior Secured Notes (Details)	3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]
Redemption price percentage to change in control (as a percent)	101.00%

Debt Instrument, Redemption Price, Percentage, Change in Control

No definition available.

Name:	bhc_DebtInstrumentRedemptionPricePercentageChangeinControl
Namespace Prefix:	bhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration