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LONG-TERM DEBT - Narrative (Detail) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 12, 2019 | Sep. 14, 2018 | Oct. 31, 2016 | Jun. 22, 2016 | Aug. 31, 2013 | Dec. 31, 2018 | Jun. 08, 2018 | Dec. 31, 2017 | Jun. 05, 2014
Interest rate swap agreements |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate swap agreements, notional amount |  |  |  |  |  | $ 150,000,000 |  |  | $ 150,000,000
Interest rate on notional value (as a percent) |  |  |  |  |  |  |  |  | 3.68%
2018 Refinancing Credit Agreement |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Covenant restrictions |  |  |  |  |  | $ 300,000,000 |  |  |
Debt Instrument, Restrictive Covenants, EBITDA to Interest Expense Ratio, Minimum |  |  |  |  |  | 3.00 |  |  |
Debt Instrument, Restrictive Covenants, Leverage Ratio, Maximum |  |  |  |  |  | 3.25 |  |  |
Debt Instrument, Restrictive Covenants, Minimum Cash Consideration Transferred in Acquisition |  |  |  |  |  | $ 500,000,000 |  |  |
Debt Instrument, Restrictive Covenants, Leverage Ratio, Three Quarters Following Acquisition, Maximum |  |  |  |  |  | 3.75 |  |  |
Debt Instrument, Restrictive Covenants, Leverage Ratio, Fourth and Fifth Quarter Following Acquisition, Maximum |  |  |  |  |  | 3.50 |  |  |
2018 Refinancing Credit Agreement | LIBOR | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 1.00% |  |  |
2018 Refinancing Credit Agreement | LIBOR | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 1.875% |  |  |
2018 Refinancing Credit Agreement | Base Rate | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.00% |  |  |
2018 Refinancing Credit Agreement | Base Rate | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.875% |  |  |
2016 Refinancing Credit Agreement |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Deferred financing cost |  |  |  | $ 3,300,000 |  |  |  |  |
2016 Refinancing Credit Agreement | Federal Funds Effective Swap Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.50% |  |  |
2016 Refinancing Credit Agreement | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 1.00% |  |  |
2016 Refinancing Credit Agreement | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.00% |  |  |
2016 Refinancing Credit Agreement | Base Rate | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.00% |  |  |
2016 Refinancing Credit Agreement | Base Rate | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.75% |  |  |
2016 Refinancing Credit Agreement | Alternative Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 1.75% |  |  |
2016 Refinancing Credit Agreement | Alternative Rate | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 0.75% |  |  |
2016 Refinancing Credit Agreement | Alternative Rate | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  |  |  |  |  | 1.75% |  |  |
Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  | $ 2,500,000,000.0 |  |  |  |  |  |  |
Senior Notes | Floating Rate Notes, due 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  | $ 500,000,000.00 |  |  |  |  |  |  |
Debt Instrument, Term |  | 1 year |  |  |  |  |  |  |
Debt issuance face value (as a percent) |  | 100.00% |  |  |  |  |  |  |
Deferred financing cost |  | $ 3,500,000 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 496,796,000 |  | $ 0 |
Senior Notes | Floating Rate Notes, due 2021 | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument basis points spread on variable rate |  | 1.05% |  |  |  |  |  |  |
Senior Notes | 4.150% Senior Notes, due 2024 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  | $ 750,000,000.0 |  |  |  |  |  |  |
Debt issuance face value (as a percent) |  | 99.805% |  |  |  |  |  |  |
Deferred financing cost |  | $ 7,400,000 |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 4.15% |  |  |  | 4.15% |  |  |
Long-term debt |  |  |  |  |  | $ 742,957,000 |  | 0 |
Senior Notes | 4.70% Senior Notes, due 2028 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  | $ 1,250,000,000.0 |  |  |  |  |  |  |
Debt issuance face value (as a percent) |  | 99.889% |  |  |  |  |  |  |
Deferred financing cost |  | $ 10,600,000 |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 4.70% |  |  |  | 4.70% |  |  |
Long-term debt |  |  |  |  |  | $ 1,239,657,000 |  | $ 0 |
Senior Notes | 3.45% Senior Notes, due 2026 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  | $ 750,000,000.0 |  |  |  |  |  |
Debt issuance face value (as a percent) |  |  | 99.965% |  |  |  |  |  |
Deferred financing cost |  |  | $ 2,700,000 |  |  |  |  |  |
Stated interest rate (as a percent) |  |  | 3.45% |  |  | 3.45% |  | 3.45% |
Long-term debt |  |  |  |  |  | $ 748,282,000 |  | $ 747,655,000 |
Senior Notes | 4.375% Senior Notes, due 2023 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  | $ 250,000,000.0 |  |  |  |
Debt issuance face value (as a percent) |  |  |  |  | 99.879% |  |  |  |
Deferred financing cost |  |  |  |  | $ 2,600,000 |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 4.375% | 4.375% |  | 4.375% |
Long-term debt |  |  |  |  |  | $ 248,823,000 |  | $ 248,567,000 |
Senior Notes | 2018 Refinancing Credit Agreement | Letter of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  | 29,200,000 |  |  |
Covenant restrictions |  |  |  |  |  | 1,170,800,000 |  |  |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 338,112,000 |  | $ 853,124,000 |
Line of Credit | 2018 Refinancing Credit Agreement | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | $ 1,200,000,000.0 |  |
Line of Credit Uncommitted Accordion Feature |  |  |  |  |  |  | 600,000,000 |  |
Line of Credit | 2018 Refinancing Credit Agreement | Term Loan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | 350,000,000 |  |
Line of Credit | 2018 Refinancing Credit Agreement | Delayed Draw Term Loan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | 400,000,000 |  |
Line of Credit | 2018 Refinancing Credit Agreement | Letter of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | 450,000,000 |  |
Line of Credit | 2018 Refinancing Credit Agreement | Swing Line Sub Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | 75,000,000 |  |
Line of Credit | 2016 Refinancing Credit Agreement | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  | $ 1,200,000,000.0 |  |  |  |  |
Credit facility loan term, years |  |  |  | 5 years |  |  |  |  |
Line of Credit | 2016 Refinancing Credit Agreement | Term Loan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  | $ 400,000,000 |  |  |  |  |
Bridge Loan | 2018 Refinancing Credit Agreement |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount |  |  |  |  |  |  | $ 2,500,000,000 |  |
Subsequent Event | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate increase | 0.25% |  |  |  |  |  |  |  |

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