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LONG-TERM DEBT - Term Loan Facility due 2026 (Details) - USD ($) |  |  |  |  |  |  |  |  | 3 Months Ended | 4 Months Ended | 8 Months Ended | 12 Months Ended
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Jul. 16, 2021 | Jul. 16, 2020 | Feb. 03, 2020 | Feb. 02, 2020 | Nov. 22, 2019 | Aug. 07, 2019 | May 01, 2019 | Jun. 14, 2018 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | May 01, 2019 | Dec. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  | $ 6,016,930,000 |  |  |  |  |  | $ 5,738,868,000 | $ 6,016,930,000
Payments on credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,294,000 | $ 1,285,408,000 | 352,383,000 | 532,392,000
Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  | 4,600,762,000 |  |  |  |  |  | 4,320,602,000 | 4,600,762,000
Repayments of Secured Debt | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility due 2026 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 3,500,000,000 |  |  |  |  |  |  |  | 3,500,000,000 |  |  |
Payment for debt extinguishment or debt prepayment cost |  |  |  |  |  | $ 740,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  | $ 3,500,000,000 |  |  |  | 2,080,259,000 |  |  |  | $ 3,500,000,000 |  | $ 1,864,032,000 | 2,080,259,000
Payment of principal |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Secured Debt | 205,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly prepayment requirement |  |  |  |  |  |  |  |  | $ 6,400,000 | $ 6,400,000 | 6,400,000 | $ 6,400,000 | $ 5,250,000 | $ 5,250,000 |  |  |  |
Debt instrument, prepayment amount | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, annual excess cash flow |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  | 50.00% |  |  |
Prepayment, cash proceeds from sales |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  | 100.00% |  |  |
Prepayment, cash proceeds from incurrence of debt |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  | 100.00% |  |  |
Term Loan Facility due 2026 | Secured Debt | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, annual excess cash flow, reduction |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  | 0.00% |  |  |
Prepayment, cash proceeds from sales , reduction |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  | 0.00% |  |  |
Term Loan Facility due 2026 | Secured Debt | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, annual excess cash flow, reduction |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  | 25.00% |  |  |
Prepayment, cash proceeds from sales , reduction |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  | 50.00% |  |  |
Term Loan Facility due 2026 | Secured Debt | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 3.25% |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Floor Rate | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility due 2026 | Secured Debt | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Floor Rate | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility due 2026 | Secured Debt | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
5.25% Senior Secured Notes due 2027 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  |  | 5.25% |
Long-term debt |  |  |  |  |  |  |  |  |  |  | 750,000,000 |  |  |  |  |  | $ 750,000,000 | 750,000,000
4.75% Senior Secured Notes due 2028 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 4.75% |  |  |  |  |  |  |  |  |  |  |  | 4.75% |
Long-term debt |  |  |  |  | $ 500,000,000 |  |  |  |  |  | 500,000,000 |  |  |  |  |  | $ 500,000,000 | 500,000,000
Incremental Term Loan Facility due 2026 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  | $ 425,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  | 447,750,000 |  |  |  |  |  | 401,220,000 | 447,750,000
Repayments of Secured Debt | $ 44,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental Term Loan Facility due 2026 | Secured Debt | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Floor Rate | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental Term Loan Facility due 2026 | Secured Debt | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Floor Rate | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental Term Loan Facility due 2026 | Secured Debt | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Floor Rate | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-based Revolving Credit Facility Due 2023 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 |  | 0 | $ 0
Subsidiaries | Term Loan Facility due 2026 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 3,500,000,000 |  |  |  |  |  |  |  | $ 3,500,000,000 |  |  |
Payments on credit facilities |  |  | $ 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries | Term Loan Facility due 2026 | Secured Debt | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 3.00% | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries | Term Loan Facility due 2026 | Secured Debt | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25% |  | 2.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries | Incremental Term Loan Facility due 2026 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 450,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries | Asset-based Revolving Credit Facility Due 2023 | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing base availability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 423,100,000 |
Subsidiaries | Asset-based Revolving Credit Facility Due 2023 | Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments on credit facilities |  | 235,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing base availability |  | $ 190,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries | Asset-based Revolving Credit Facility Due 2023 | Line of Credit | Base Rate | Revolving Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  | 0.25% | 0.25% |  |  |  |  |  |  |  |  |  |
Subsidiaries | Asset-based Revolving Credit Facility Due 2023 | Line of Credit | Base Rate | Revolving Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  | 0.75% | 0.75% |  |  |  |  |  |  |  |  |  |

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