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Condensed Consolidating Financial Information (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument
Long-term Debt	$ 11,342,000,000	$ 9,729,000,000
Recourse Debt [Member]
Debt Instrument
Long-term Debt	8,046,000,000	7,933,000,000
Senior Notes [Member] \| Recourse Debt [Member]
Debt Instrument
Long-term Debt	$ 6,200,000,000

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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