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Debt - Recourse Debt (Details) (USD $)	3 Months Ended			1 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 07, 2014 Recourse Debt [Member] 5.50% Senior Notes Due 2024 [Member]	Feb. 28, 2014 Recourse Debt [Member] 7.75% Senior Notes Due 2014 [Member]	Mar. 07, 2014 Recourse Debt [Member] 8.0% Senior Notes Due 2017 [Member]
Debt Instrument [Line Items]
Redeemed notes				$ 110,000,000	$ 625,000,000
Interest rate on senior notes			5.50%	7.75%	8.00%
Issued senior notes			750,000,000
Loss on extinguishment of debt	$ 134,000,000	$ 47,000,000			$ 132,000,000

X

- 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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-Name Accounting Standards Codification

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-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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X

- 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

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X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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