Consolidating Financial Information (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Additional Consolidating Financial Information (Textuals)
Percentage Of Ownership Over Guarantor Subsidiaries	100.00%
Guarantor Obligations, Related Party Disclosure	The notes are fully and unconditionally guaranteed on a joint and several basis by each guarantor subsidiary.
Consolidating Financial Information Restrictions on Remittance of Funds	Certain non-guarantor subsidiaries of the Parent Company are limited in their ability to remit funds to it by means of dividends, advances or loans due to required foreign government and/or currency exchange board approvals or limitations in credit agreements or other debt instruments of those subsidiaries.
8.25% senior notes
Consolidating Financial Information (Textuals)
Issuance of aggregate principal amount of senior notes	1,000
Debt Instrument, Interest Rate, Stated Percentage	8.25%
Debt Instrument, Maturity Date	Aug. 15, 2020
8.75% Notes due 2020
Consolidating Financial Information (Textuals)
Issuance of aggregate principal amount of senior notes	282
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Debt Instrument, Maturity Date	Aug. 15, 2020
6.5% Notes due 2021
Consolidating Financial Information (Textuals)
Issuance of aggregate principal amount of senior notes	900
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Debt Instrument, Maturity Date	Mar. 01, 2021
7% Notes due 2022
Consolidating Financial Information (Textuals)
Issuance of aggregate principal amount of senior notes	700
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Debt Instrument, Maturity Date	May 15, 2022

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Percentage of ownership over guarantor subsidiaries.

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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher SEC

-Name Regulation S-X (SX)

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-Section 02

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Describes certain required disclosures for those guarantees that are issued to benefit entities meeting the definition of a related party.

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The description of the nature of any restrictions on the ability of consolidated and unconsolidated subsidiaries to transfer funds to the parent in the form of cash dividends, loans and advances.

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