v2.3.0.15

Financial Instrument (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended		9 Months Ended	12 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2011	Jun. 30, 2009 Swap	Sep. 30, 2011 Year Swap Segment	Dec. 31, 2010	Jun. 30, 2011 5.75% senior notes maturing on June 2011 [Member]	Sep. 30, 2011 6.5% senior notes maturing on November 2013 [Member]
Debt Instrument [Line Items]
Interest rate on notes					5.75%	6.50%
Gain recorded on the swap agreements	$ 25
Repayment of senior notes						500
Repayment of long-term debt			813		250
Financial Instruments (Textuals) [Abstract]
Maturities of US T-bill				May, 2011
Number of terminated interest rate swap agreement			2
Number of interest rate swap agreement		2
Notional amount of interest rate swap		$ 250

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Financial instruments.

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Maturities of investment.

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Notional amount of interest rate swap.

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Number of interest rate swap contracts entered.

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Number of interest rate swap contracts terminated.

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Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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-Subparagraph (SX 210.5-02.22(a)(1))

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph a(1)

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-Name Accounting Standards Codification

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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