Consolidating Financial Information (Details Textuals) $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($)
Additional Consolidating Financial Information (Textuals)
Parent Company ownership percentage over each guarantor subsidiary	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.
5.125% due 2023
Consolidating Financial Information (Textuals)
Debt instrument, principal amount	$ 1,000
Interest rate, stated percentage	5.125%
Maturity date	Nov. 15, 2023
8.75% due 2020
Consolidating Financial Information (Textuals)
Debt instrument, principal amount	$ 282
Interest rate, stated percentage	8.75%
Maturity date	Aug. 15, 2020
6.5% due 2021
Consolidating Financial Information (Textuals)
Debt instrument, principal amount	$ 900
Interest rate, stated percentage	6.50%
Maturity date	Mar. 01, 2021
7% due 2022
Consolidating Financial Information (Textuals)
Debt instrument, principal amount	$ 700
Interest rate, stated percentage	7.00%
Maturity date	May 15, 2022

Additional consolidating financial information.

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Consolidating financial information.

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Percentage of ownership over guarantor subsidiaries.

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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 55
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Contractual interest rate for funds borrowed, under the debt agreement.

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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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