2.2.0.25truefalse41201 - Disclosure - CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse12/31/2010
USD ($)
USD ($) / shares
$As_Of_12_31_2010http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit12Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit15Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDfalsefalse9/30/2010
USD ($)
$As_Of_9_30_2010http://www.sec.gov/CIK0000014272instant2010-09-30T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falsefalseUSDfalsefalse6/30/2010
USD ($)
$As_Of_6_30_2010http://www.sec.gov/CIK0000014272instant2010-06-30T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDfalsefalse3/31/2010
USD ($)
$As_Of_3_31_2010http://www.sec.gov/CIK0000014272instant2010-03-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDfalsefalse12/31/2009
USD ($)
USD ($) / shares
$As_Of_12_31_2009http://www.sec.gov/CIK0000014272instant2009-12-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit15Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit12Divide
http://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$6falsefalseUSDfalsefalse9/30/2009
USD ($)
$As_Of_9_30_2009http://www.sec.gov/CIK0000014272instant2009-09-30T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7falsefalseUSDfalsefalse6/30/2009
USD ($)
$As_Of_6_30_2009http://www.sec.gov/CIK0000014272instant2009-06-30T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDfalsefalse3/31/2009
USD ($)
$As_Of_3_31_2009http://www.sec.gov/CIK0000014272instant2009-03-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDfalsefalse12/31/2008
USD ($)
$As_Of_12_31_2008http://www.sec.gov/CIK0000014272instant2008-12-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit15Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$10falsefalseUSDfalsefalse12/31/2007
USD ($)
$As_Of_12_31_2007http://www.sec.gov/CIK0000014272instant2007-12-31T00:00:000001-01-01T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit15Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$11falsefalsetruefalse{us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis} : Non-Current Available for Sale Corporate Debt Securities, U.S. Government Agency Securities, U.S. Treasury Bills, FDIC Insured Debt Securities, Floating Rate Securites [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201014http://www.sec.gov/CIK0000014272duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseNon-Current Available for Sale Corporate Debt Securities, U.S. Government Agency Securities, U.S. Treasury Bills, FDIC Insured Debt Securities, Floating Rate Securites [Member]us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxisxbrldihttp://xbrl.org/2006/xbrldibmy_NonCurrentAvailableForSaleCorporateDebtSecuritiesUSGovernmentAgencySecuritiesUSTreasuryBillsFdicInsuredDebtSecuritiesFloatingRateSecuritesMemberus-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instancepurexbrli012falsefalseUSDtruefals
e{us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis} : Non-Current Available for Sale Corporate Debt Securities, U.S. Government Agency Securities, U.S. Treasury Bills, FDIC Insured Debt Securities, Floating Rate Securites [Member]
{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Other Noncurrent Marketable Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010257http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNon-Current Available for Sale Corporate Debt Securities, U.S. Government Agency Securities, U.S. Treasury Bills, FDIC Insured Debt Securities, Floating Rate Securites [Member]us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxisxbrldihttp://xbrl.org/2006/xbrldibmy_NonCurrentAvailableForSaleCorporateDebtSecuritiesUSGovernmentAgencySecuritiesUSTreasuryBillsFdicInsuredDebtSecuritiesFloatingRateSecuritesMemberus-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxisexplicitMemberfalsefalseOther Noncurrent Marketable Securities [Member]us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibmy_OtherNoncurrentMarketableSecuritiesMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$13falsefalsetruefalse{us-gaap_StatementScenarioAxis} : Maximum [Member]
{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Corporate Debt Securities [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201016http://www.sec.gov/CIK0000014272duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMaximum [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_MaximumMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_ScheduleOfAvailableForSaleSec
uritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instancepurexbrli014falsefalsetruefalse{us-gaap_StatementScenarioAxis} : Minimum [Member]
{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Corporate Debt Securities [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201017http://www.sec.gov/CIK0000014272duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMinimum [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_MinimumMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_ScheduleOfAvailableForSaleSec
uritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instancepurexbrli015falsefalseUSDtruefalse{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010256http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseCorporate Debt Securities [Member]us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$16falsefalsetruefalse{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Auction Rate Securities [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201015http://www.sec.gov/CIK0000014272duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAuction Rate Securities [Member]us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AuctionRateSecuritiesMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberUnit13
Standardhttp://www.xbrl.org/2003/instancepurexbrli02false0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalse<
/IsTuple>falsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalse9falsefalsefalse00falsefalsefalsefalsefalse10falsefalsefalse00falsefalsefalsefalsefalse11falsefalsefalse00falsefalsefalsetruefalse12truefalsefalse25100000002510falsetruefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the fair value of debt securities which are expected to mature after one year and through five years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 20
-Subparagraph b
falsefalse3false0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3fal
sefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalse9false<
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falsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalse<
/IsRatio>false8000000080falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the fair value of debt securities which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 20
-Subparagraph c
falsefalse4false0bmy_AvailableForSaleSecuritiesMaturitiesYearsbmyfalsenadurationThe number of years in which available for sale securities reach maturity.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7fals
efalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalse9falsefalsefalse00falsefalsefalsefalsefalse10falsefalsefalse00falsefalsefalsefalsefalse11truefalsefalse55falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13truefalsefalse1010falsefalsefalsetruefalse14truefalsefalse66falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16truefalsefalse1010falsefalsefalsetruefalseOtherxbrli:integerItemTypeintegerThe number of years in which available for sale securities reach maturity.No authoritative reference available.falsefalse5false0us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantNo definition available.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:monetaryItemTypemonetaryIncludes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of change
s in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7, 26
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7
-Footnote 1
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5
falsefalse164CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Narrative) (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue
