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Financial Instruments, Derivatives and Hedging Activities (Details 5) (USD $) In Billions, unless otherwise specified	Sep. 30, 2014
Financial Instruments, Derivatives and Hedging Activities
Carrying amount	$ 1.89
Long-term debt, fair value	$ 2.01

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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