DEBT - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Debt
Total Debt	$ 5,083	$ 4,977
Less: Current Portion of Long-Term Debt	(5,083)	(100)
Total Long-Term Debt	0	4,877
2014 Revolving Credit Facility (Shared First Priority Lien)
Debt
Total Debt	$ 731	518
2014 Revolving Credit Facility (Shared First Priority Lien) \| Applicable margin on LIBOR loans \| Minimum
Debt
Interest rate added to variable rate basis	3.25%
2014 Revolving Credit Facility (Shared First Priority Lien) \| Applicable margin on LIBOR loans \| Maximum
Debt
Interest rate added to variable rate basis	4.00%
2014 Revolving Credit Facility (Shared First Priority Lien) \| Applicable margin on Alternate Base Rate loans \| Minimum
Debt
Interest rate added to variable rate basis	2.25%
2014 Revolving Credit Facility (Shared First Priority Lien) \| Applicable margin on Alternate Base Rate loans \| Maximum
Debt
Interest rate added to variable rate basis	3.00%
2017 Credit Agreement (Shared First Priority Lien)
Debt
Total Debt	$ 1,300	1,300
2017 Credit Agreement (Shared First Priority Lien) \| Applicable margin on LIBOR loans
Debt
Interest rate added to variable rate basis	4.75%
2017 Credit Agreement (Shared First Priority Lien) \| Applicable margin on Alternate Base Rate loans
Debt
Interest rate added to variable rate basis	3.75%
2016 Credit Agreement (Shared First Priority Lien)
Debt
Total Debt	$ 1,000	1,000
2016 Credit Agreement (Shared First Priority Lien) \| Applicable margin on LIBOR loans
Debt
Interest rate added to variable rate basis	10.375%
2016 Credit Agreement (Shared First Priority Lien) \| Applicable margin on Alternate Base Rate loans
Debt
Interest rate added to variable rate basis	9.375%
Second Lien Notes (Second Priority Lien)
Debt
Total Debt	$ 1,808	1,815
Debt instrument, interest rate, stated percentage	8.00%
Senior Notes (Unsecured) \| 5% Senior Notes due 2020
Debt
Total Debt	$ 0	100
Debt instrument, interest rate, stated percentage	5.00%
Senior Notes (Unsecured) \| 5.5% Senior Notes due 2021
Debt
Total Debt	$ 100	100
Debt instrument, interest rate, stated percentage	5.50%
Senior Notes (Unsecured) \| 6% Senior Notes due 2024
Debt
Total Debt	$ 144	$ 144
Debt instrument, interest rate, stated percentage	6.00%

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

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- Definition

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

+ References

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-Publisher FASB
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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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- References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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