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Derivative Financial Instruments (Narrative) (Details) - Jun. 30, 2015 - USD ($)
$ in Millions
Total
Derivative [Line Items]  
Cash flow hedge losses to be reclassified during the next 12 months, pre-tax $ 131
Fair value of foreign exchange and commodity contracts that have credit-risk-related contingent features that are in a net liability position $ 32
Foreign Exchange Contract [Member] | Maximum [Member]  
Derivative [Line Items]  
Derivative, Maturity Date Dec. 31, 2019
Commodity Contract [Member] | Maximum [Member]  
Derivative [Line Items]  
Derivative, Maturity Date Dec. 31, 2017