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Investments and Related Matters Investment Segment (Details) (Investment Segment [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2012
Jun. 30, 2013
Hain [Member]
Jun. 30, 2013
Equity Method Investments [Member]
Jun. 30, 2012
Equity Method Investments [Member]
Jun. 30, 2013
Equity Method Investments [Member]
Jun. 30, 2012
Equity Method Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Fair value of equity method investment under fair value option $ 376          
Fair value option, recorded gains (losses)     $ 22 $ 46 $ 62 $ 167
Fair value option investment ownership percentage   15.00%