Debt Instrument, Maximum Redemption Percentage With Equity Offering Proceeds

No definition available.

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

- Definition

Debt Instrument, Redemption Price, Percentage, Change in Control

+ References

No definition available.

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_SeniorSecured5.75NotesDueAugust2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_A8.50SeniorNotesDueJanuary2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_A5.875SeniorNotesdueMay2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_SeniorNotes5.625PercentDueDecember2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_A5.50SeniorNotesdueMarch2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bhc_SeniorSecuredNotesAndSeniorUnsecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FINANCING ARRANGEMENTS - Senior Secured Notes (Details) - USD ($)				1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 23, 2019	Mar. 08, 2019	Mar. 26, 2018	Apr. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Jun. 01, 2018
Debt Instrument [Line Items]
Redemption price percentage to change in control (as a percent)							101.00%
Repayments of long-term debt							$ 3,956,000,000	$ 8,200,000,000
Loss on extinguishment of debt		$ 8,000,000			$ 0	$ 0	$ 40,000,000	$ 75,000,000
Senior Unsecured Notes
Debt Instrument [Line Items]
Redemption price percentage to change in control (as a percent)										101.00%
Loss on extinguishment of debt	$ 32,000,000		$ 26,000,000
5.75% Senior Secured Notes Due August 2027 \| Senior Secured Notes
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)		5.75%
Principal amount		$ 500,000,000
Redemption price percentage (as a percent)									100.00%
Maximum percentage of the aggregate principal amount that may be redeemed with the net proceeds of certain equity offerings									40.00%
8.50% Senior Notes Due January 2027 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)					8.50%		8.50%				8.50%
Principal amount		$ 1,000,000,000
5.875% Senior Notes Due May 2023 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)		5.875%			5.875%		5.875%
Repayments of long-term debt		$ 584,000,000
5.625% Senior Notes Due December 2021 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)		5.625%			5.625%		5.625%
Repayments of long-term debt		$ 518,000,000		$ 182,000,000
5.50% Senior Notes Due March 2023 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)		5.50%			5.50%		5.50%
Repayments of long-term debt		$ 216,000,000
Senior Secured Notes and Senior Unsecured Notes
Debt Instrument [Line Items]
Principal amount				$ 1,500,000,000