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USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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USD ($)
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1/1/2008 - 12/31/2008
USD ($)
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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1/1/2010 - 12/31/2010
USD ($)
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12/31/2010
EUR (€)
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12/31/2010
USD ($)
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12/31/2010
EUR (€)
€As_Of_12_31_201032http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNotes due 2021 [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_NotesDue2021Memberus-gaap_StatementScenarioAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2003/iso4217EURiso42170EUREUR€14falsefalseUSDtruefalse{us-gaap_StatementScenarioAxis} : Notes due 2021 [Member]
12/31/2010
USD ($)
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12/31/2010
USD ($)
$As_Of_12_31_2010212http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00falsefalse6.80% Debentures Due 2026 [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_SixPointEightZeroPercentDebenturesDueTwoThousandTwentySixMemberus-gaap_StatementScenarioAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/200
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12/31/2010
USD ($)
$As_Of_12_31_2010211http://www.sec.gov/CIK0000014272instant2010-12-31T00:00:000001-01-01T00:00:00falsefalse7.15% Debentures Due 2023 [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_SevenPointOneFivePercentDebenturesDueTwoThousandTwentyThreeMemberus-gaap_StatementScenarioAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2
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12/31/2009
USD ($)
$As_Of_12_31_200963http://www.sec.gov/CIK0000014272instant2009-12-31T00:00:000001-01-01T00:00:00falsefalse5.45% Notes Due 2018 [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldibmy_FivePointFourFivePercentNotesDueTwoThousandEighteenMemberus-gaap_StatementScenarioAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$18falsefalseEURtruefalse{us-gaap_StatementScenarioAxis} : 4.375% 500 Million Notes Due 2016 [Member]
12/31/2010
EUR (€)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Federal Regulation (FR)
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-Publisher SEC
-Name Regulation S-X (SX)
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 17
falsefalse20false0bmy_NotionalAmountOfDebtRepurchasedbmyfalsedebitdurationThe notional amount of debt repurchased during the period.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse750000000750000000falsefalsefalsefalsefalse2truefalsefalse117000000117000000falsefalsefalsefalsefalse3truefalsefalse254000000254000000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsef
alse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe notional amount of debt repurchased during the period.No authoritative reference available.falsefalse21false0bmy_NotionalAmountOfInterestRateSwapsbmyfalsedebitdurationThe notional amount of debt repurchased during the period.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse319000000319000000falsefalsefalsefalsefalse2truefalsefalse5300000053000000falsefalsefalsefalsefalse3truefalsefalse241000000241000000falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe notional amount of debt repurchased during the period.No authoritative reference available.falsefalse22false0bmy_FixedToFloatingInterestRateSwapsExecutedFairValueHedgesbmyfalsecreditin
stantThe amount of fixed rate debt converted to variable rate debt through an interest rate swap fair value hedge during the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefal
sefalsefalsefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15truefalsefalse332000000332000000falsetruefalsetruefalse16truefalsefalse147000000147000000falsetruefalsetruefalse17truefalsefalse797000000797000000falsetruefalsetruefalse18truefalsefalse500000000500000000falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of fixed rate debt converted to variable rate debt through an interest rate swap fair value hedge during the period.No authoritative reference available.falsefalse1816FINANCIAL INSTRUMENTS (Narrative) (Details)NoRoundingUnKnownUnKnownUnKnowntruetrue
