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LONG-TERM DEBT - Narrative (Details) - USD ($) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 12, 2019 | Sep. 14, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 08, 2018
Debt Instrument [Line Items] |  |  |  |  |
Total unamortized debt issuance costs |  |  | $ 21,300,000 | $ 26,500,000 |
Maximum borrowing capacity |  |  | $ 1,200,000,000.0 |  |
Interest rate swap agreements |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on notional value (as a percent) |  |  | 3.08% |  |
2018 Refinancing Credit Agreement | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum unrestricted cash |  |  | $ 300,000,000.0 |  |
Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total unamortized debt issuance costs |  | $ 18,000,000.0 |  |  |
Par value |  | 2,500,000,000.0 |  |  |
Discount at issuance |  | 2,900,000 |  |  |
Debt issuance face value (as a percent) |  |  | 101.00% |  |
Interest rate increase | 0.25% |  |  |  |
Senior Notes | Floating Rate Notes Due 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Par value |  | 500,000,000.0 |  |  |
Discount at issuance |  | $ 0 |  |  |
Senior Notes | Floating Rate Notes Due 2021 | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument spread on variable rate |  | 1.05% |  |  |
Senior Notes | 4.150 Percent Senior Notes Due Twenty Thousand and Twenty Four |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Par value |  | $ 750,000,000.0 |  |  |
Discount at issuance |  | $ 1,500,000 |  |  |
Stated interest rate (as a percent) |  | 4.15% | 4.15% | 4.15% |
Senior Notes | 4.70 Percent Senior Notes Due Twenty Thousand and Twenty Six |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Par value |  | $ 1,250,000,000.0 |  |  |
Discount at issuance |  | $ 1,400,000 |  |  |
Stated interest rate (as a percent) |  | 4.70% | 4.70% | 4.70% |
Line of Credit | 2018 Refinancing Credit Agreement | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument spread on variable rate |  |  | 1.375% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Base Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument spread on variable rate |  |  | 0.375% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 1,200,000,000.0
Commitment fee percentage |  |  | 0.15% |  |
Uncommitted accordion feature |  |  |  |  | 600,000,000.0
Line of Credit | 2018 Refinancing Credit Agreement | Revolving Credit Facility | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  | 0.10% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Revolving Credit Facility | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  | 0.30% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 350,000,000.0
Quarterly repayment amount (as a percent) |  |  | 2.50% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Term Loan | Base Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument spread on variable rate |  |  | 0.375% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Term Loan | Eurodollar |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument spread on variable rate |  |  | 1.375% |  |
Line of Credit | 2018 Refinancing Credit Agreement | Delayed Draw Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 400,000,000.0
Line of Credit | 2018 Refinancing Credit Agreement | Letter of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 450,000,000.0
Line of Credit | 2018 Refinancing Credit Agreement | Swing Line Sub Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 75,000,000.0

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