Stock Compensation (Summary Of Restricted Stock Awards And PSUs Activity During The Period) (Details) (Restricted Stock Awards And PSUs [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended	12 Months Ended
Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2012
Restricted Stock Awards And PSUs [Member]
Restricted Stock Awards and PSU's, Non-vested at beginning of period		3,557
Restricted Stock Awards and PSU's, Granted	1,300	1,396	900	1,200
Restricted Stock Awards, Vested		(1,250)
Restricted Stock Awards and PSU's, Forfeited		(147)
Restricted Stock Awards and PSU's, Non-vested at end of period		3,556	3,557
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Non-vested at beginning of period (in dollars per share)		$ 28.86
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Granted (in dollars per share)	$ 26.34	$ 40.78	$ 32.96	$ 26.75
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Vested (in dollars per share)		$ 27.86
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Forfeited (in dollars per share)		$ 33.68
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Non-vested at end of period (in dollars per share)		$ 34.17	$ 28.86

Stock Compensation (Summary Of Restricted Stock Awards And PSUs Activity During The Period) (Details) (Restricted Stock Awards And PSUs [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified

6 Months Ended

12 Months Ended

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Jun. 30, 2012

Restricted Stock Awards And PSUs [Member]

Restricted Stock Awards and PSU's, Non-vested at beginning of period

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Restricted Stock Awards and PSU's, Granted

1,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
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= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

1,396us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
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= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

900us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

1,200us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
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= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Restricted Stock Awards, Vested

(1,250)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
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= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Restricted Stock Awards and PSU's, Forfeited

(147)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
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Restricted Stock Awards and PSU's, Non-vested at end of period

3,556us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Non-vested at beginning of period (in dollars per share)

$ 28.86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Granted (in dollars per share)

$ 26.34us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

$ 40.78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

$ 32.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

$ 26.75us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Vested (in dollars per share)

$ 27.86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Forfeited (in dollars per share)

$ 33.68us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Non-vested at end of period (in dollars per share)

$ 34.17us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adm_RestrictedStockAwardsAndPerformanceStockUnitsMember

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Balance Type:	na
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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Period Type:	instant

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Period Type:	duration

- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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