ACQUISITIONS ACQUISITIONS (Details) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Acquisitions [Abstract]
Asset acquisition payment	$ 800
Contingent and regulatory milestone payments	450
Upfront payment allocated to research and development expenses	800	$ 148
Deferred tax assets related to acquisition	$ 14

Acquisitions [Abstract]

No definition available.

Name:	bmy_AcquisitionsAbstract
Namespace Prefix:	bmy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the upfront payment to acquire an asset.

+ References

No definition available.

+ Details

Name:	bmy_Assetacquisitionpayment
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the total contingent approval milestone payments and regulatory of potential payments to alliance partner

+ References

No definition available.

+ Details

Name:	bmy_ContingentandRegulatoryMilestonePayments
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the upfront payment to acquire an entity, net of tax, charged to research and development expense.

+ References

No definition available.

+ Details

Name:	bmy_Upfrontpaymentallocatedtoresearchanddevelopmentexpenses
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred tax asset attributable to deductible temporary differences and carryforwards that are expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant