Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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- Definition

The amount that was dedesignated from being a hedging instrument for a net investment hedge relationship.

+ References

No definition available.

+ Details

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Namespace Prefix:	mmm_
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- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1),(2)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Details

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- Definition

Current period adjustment resulting from gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity, gross of tax effect.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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Derivatives (Details 2) In Millions, unless otherwise specified		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended
	Jun. 30, 2014 Eurobond Due 2014 EUR (€)	Jun. 30, 2014 Net Investment Hedges USD ($)	Jun. 30, 2013 Net Investment Hedges USD ($)	Jun. 30, 2014 Net Investment Hedges USD ($)	Jun. 30, 2013 Net Investment Hedges USD ($)	Jun. 30, 2014 Net Investment Hedges Foreign currency forward contracts USD ($)	Jun. 30, 2014 Net Investment Hedges Foreign currency forward contracts USD ($)	Jun. 30, 2014 Net Investment Hedges Foreign currency forward contracts EUR (€)	Nov. 30, 2013 Net Investment Hedges Foreign currency forward contracts EUR (€)	Jun. 30, 2014 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Jun. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Jun. 30, 2014 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Jun. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Jul. 31, 2007 Net Investment Hedges Eurobond Due 2014 EUR (€)	Dec. 31, 2007 Net Investment Hedges Eurobond Due 2014 EUR (€)	Nov. 30, 2013 Net Investment Hedges Eurobond Due 2021 EUR (€)
Net investment hedges
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument		$ (17)	$ (24)	$ (26)	$ 17	$ 1	$ 1			$ (18)	$ (24)	$ (27)	$ 17
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income		0	0	0	0	0	0			0	0	0	0
Term of debt instrument														7 years	7 years	8 years
Face amount	1,025								594					750	275	600
Derivative notional amount								450
Face amount of debt dedesignated from net investment hedge	€ 716