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Long-Term Debt (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Summary showing division of total long term debt
Unsecured obligations	$ 852	$ 852
Obligations secured by real estate	61	61
Long-term debt	$ 913	$ 913

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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