Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Short-Term Loans and Debentures (Details)

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Commitments and Contingencies Short-Term Loans and Debentures (Details) (Debentures [Member], USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Debentures [Member]
 
Short-term Debt [Line Items]  
All outstanding debentures, including accrued interest, redeemed in full $ 492