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DEBT - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions		2 Months Ended
	Oct. 27, 2020	Dec. 31, 2020	Oct. 31, 2020	Dec. 31, 2019
Debt
Long-term debt (principal amount)		$ 599	$ 725	$ 5,000
Unamortized debt issuance costs		(2)	(2)
Total long-term debt, net		597	723
Second Lien Term Loan | Line of Credit | LIBOR
Debt
Interest rate added to variable rate basis	1.00%
Second Lien Term Loan | Lien Notes
Debt
Long-term debt (principal amount)		$ 200	200
Second Lien Term Loan | Lien Notes | LIBOR | Minimum
Debt
Interest rate added to variable rate basis		9.00%
Second Lien Term Loan | Lien Notes | LIBOR | Maximum
Debt
Interest rate added to variable rate basis		10.50%
Second Lien Term Loan | Lien Notes | Alternative Base Rate | Minimum
Debt
Interest rate added to variable rate basis		8.00%
Second Lien Term Loan | Lien Notes | Alternative Base Rate | Maximum
Debt
Interest rate added to variable rate basis		9.50%
EHP Notes | Senior Notes (Unsecured)
Debt
Long-term debt (principal amount)		$ 300	300
Interest rate		6.00%
Revolving Credit Facility | Line of Credit
Debt
Long-term debt (principal amount)		$ 99	$ 225
Revolving Credit Facility | Line of Credit | LIBOR
Debt
Interest rate added to variable rate basis	1.00%
Revolving Credit Facility | Line of Credit | LIBOR | Minimum
Debt
Interest rate added to variable rate basis		3.00%
Revolving Credit Facility | Line of Credit | LIBOR | Maximum
Debt
Interest rate added to variable rate basis		4.00%
Revolving Credit Facility | Line of Credit | Alternative Base Rate | Minimum
Debt
Interest rate added to variable rate basis		2.00%
Revolving Credit Facility | Line of Credit | Alternative Base Rate | Maximum
Debt
Interest rate added to variable rate basis		3.00%

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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

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-SubTopic 20
-Section 50
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- Definition

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

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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-Topic 470
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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
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