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Debt Recourse Debt (Details) (USD $)	1 Months Ended		3 Months Ended		9 Months Ended									3 Months Ended
	Jun. 30, 2013	May 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	May 17, 2013 4.875% Senior Notes Due 2023 [Member]	Apr. 30, 2013 4.875% Senior Notes Due 2023 [Member]	Jun. 30, 2013 7.75% Senior Notes Due 2014 [Member]	May 31, 2013 7.75% Senior Notes Due 2014 [Member]	May 31, 2013 7.75% Senior Notes Due 2015 [Member]	May 31, 2013 9.75% Senior Notes Due 2016 [Member]	May 31, 2013 8.0% Senior Notes Due 2017 [Member]	Sep. 30, 2013 Revolving Credit Facility [Member]	Sep. 30, 2013 Recourse Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 750,000,000		$ 750,000,000		$ 250,000,000	$ 500,000,000
Debt Instrument, Term			10 years
Debt Instrument, Interest Rate, Stated Percentage							4.875%	4.875%	7.75%	7.75%	7.75%	9.75%	8.00%
Extinguishment of Debt, Amount	122,000,000	928,000,000	300,000,000
Loss on extinguishment of debt			0	0	212,000,000	0									163,000,000
Debt Instrument, Description of Variable Rate Basis														LIBOR
Debt Instrument, Basis Spread on Variable Rate														2.25%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage														0.50%
Line of Credit Facility, Maximum Borrowing Capacity														$ 800,000,000

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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- Definition

Contractual interest rate for funds borrowed, under the 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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-Section S99

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

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Gross amount of debt extinguished.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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-Name Accounting Standards Codification

-Topic 230

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-Paragraph 28

-Subparagraph (b)

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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