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SUBSEQUENT EVENTS - Refinancing (Details) - USD ($) |  |  |  |  |  |  | 3 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 02, 2020 | Feb. 07, 2020 | Mar. 17, 2017 | Mar. 01, 2017 | Feb. 09, 2017 | Nov. 30, 2016 | Mar. 31, 2020 | Jan. 01, 2021 | Jun. 30, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | May 31, 2019 | Dec. 31, 2018 | Oct. 17, 2016
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  | $ 3,585,200,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.25%
Repayments of Long-term Debt |  | $ 1,464,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Base Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ 1,200,000,000.0 |  |  |  |  |  |  |  | $ 1,200,000,000.0 |  |  |  |  |
Amended ABL Credit Agreement [Member] | Base Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Spread On Applicable Margin | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Amended ABL Credit Agreement [Member] | Base Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Spread On Applicable Margin | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | One, Two, Three Or Six Month Or 12-Month LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | One Month LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Overnight Federal Funds And Overnight LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount tendered in change of control in business combination repurchased |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |
Proceeds from Issuance of Debt | $ 2,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold additional loan principal amount | $ 325,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated EBITDA | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold consolidated total net leverage ratio | 0.0375 |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold consolidated first lien net leverage ratio | 0.0525 |  |  |  |  |  |  |  |  |  |  |  |  |
Pecentage of principal amount amortized | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Credit Agreement [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Credit Agreement [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan Credit Agreement [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ 1,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount In Next Fiscal Year | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount Until Maturity | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 455,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Increase In Maximum Borrowing Capacity | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 1.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] | One Month LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Spread On Applicable Margin | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] | Overnight Federal Funds And Overnight LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Spread On Applicable Margin | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Amended ABL Credit Agreement [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Spread On Applicable Margin | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | ABL Credit Agreement, Subfacility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | ABL Credit Agreement, Swingline Subfacility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Forecast [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  | $ 1,000,000,000.0 |  |  |  |  |  |
Forecast [Member] | Term Loan Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption premium |  |  |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |
Write-off of deferred debt issuance costs |  |  |  |  |  |  | $ 38,000,000 |  |  |  |  |  |  |
Term Loan due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  | $ 2,245,000,000 |  |  |  |  |  | 2,070,000,000 |  | $ 2,070,000,000 |
Repayments of Long-term Debt |  |  |  | $ 500,000,000 | $ 75,000,000 |  |  |  |  |  |  |  |  |
Term Loan due 2023 | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
9.250% Senior notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  | 750,000,000 |  | 750,000,000 |
12.00%/13.00% PIK notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  | 500,000,000 |  | 500,000,000 |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 13.00% |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |
12.00%/13.00% PIK notes due 2022 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |
ABL Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  | 145,200,000 |  | $ 245,100,000 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 400,000,000 |  |  |  |  | 455,000,000 |  |  |
ABL Revolving Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |
10.00% notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  | $ 120,000,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |

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