Employee Benefit Plans (Details 2) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010
Common stock - ADM common stock | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value		$ 19
Common stock - ADM common stock | Total Fair Value
Assets
Total assets at fair value		19
Common stock - U.S. companies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	180	64
Common stock - U.S. companies | Total Fair Value
Assets
Total assets at fair value	180	64
Common stock - International companies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	5	3
Common stock - International companies | Total Fair Value
Assets
Total assets at fair value	5	3
Equity mutual funds - Emerging markets | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	70	53
Equity mutual funds - Emerging markets | Total Fair Value
Assets
Total assets at fair value	70	53
Equity mutual funds - International | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	99	70
Equity mutual funds - International | Total Fair Value
Assets
Total assets at fair value	99	70
Equity mutual funds - Large cap U.S. | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	378	230
Equity mutual funds - Large cap U.S. | Total Fair Value
Assets
Total assets at fair value	378	230
Equity mutual funds - Other | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	1	1
Equity mutual funds - Other | Total Fair Value
Assets
Total assets at fair value	1	1
Common collective trust funds - International equity | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	341	365
Common collective trust funds - International equity | Total Fair Value
Assets
Total assets at fair value	341	365
Common collective trust funds - Small cap U.S. equity | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value		76
Common collective trust funds - Small cap U.S. equity | Total Fair Value
Assets
Total assets at fair value		76
Common collective trust funds - Large cap U.S. equity | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	24	52
Common collective trust funds - Large cap U.S. equity | Total Fair Value
Assets
Total assets at fair value	24	52
Common collective trust funds - Fixed income | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	444	252
Common collective trust funds - Fixed income | Total Fair Value
Assets
Total assets at fair value	444	252
Common collective trust funds - Other | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	60	32
Common collective trust funds - Other | Total Fair Value
Assets
Total assets at fair value	60	32
Debt instruments - Corporate bonds | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	442	383
Debt instruments - Corporate bonds | Total Fair Value
Assets
Total assets at fair value	442	383
Debt instruments - U.S. Treasury instruments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	49	84
Debt instruments - U.S. Treasury instruments | Total Fair Value
Assets
Total assets at fair value	49	84
Debt instruments - U.S. government agency, state and local government bonds | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	35	16
Debt instruments - U.S. government agency, state and local government bonds | Total Fair Value
Assets
Total assets at fair value	35	16
Debt instruments - Other | Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	6	21
Debt instruments - Other | Total Fair Value
Assets
Total assets at fair value	6	21
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets at fair value	782	524
Significant Other Observable Inputs (Level 2)
Assets
Total assets at fair value	1,352	1,197
Total Fair Value
Assets
Total assets at fair value	$ 2,134	$ 1,721