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Long- Term Debt (Details 1) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Summary of Deferred Finance Cost
Balance as of January 1, 2012			$ (98)
Capitalization of debt finance costs	9
Amortization	22	12
Balance as of June 30, 2012	$ 85

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

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