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Stockholders' Equity Stockholders' Equity (Noncontrolling Interest) (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Solae LLC Joint Venture [Member]
May 01, 2012
Solae LLC Joint Venture [Member]
Noncontrolling Interest [Line Items]          
Noncontrolling interest, ownership percentage by noncontrolling owners         28.00%
Payments for noncontrolling interests $ 470 $ 0 $ 0 $ 447  
Carrying value of noncontrolling interest in joint venture         362
Deferred tax liability 4,200 4,398     74
Reduction to parent additional paid-in capital       $ 11