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LONG-TERM DEBT - Notes (Details) - USD ($) | Sep. 14, 2018 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total |  | $ 4,429,300,000 | $ 3,856,900,000
Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Par Value | $ 2,500,000,000.0 |  |
Discount at Issuance | 2,900,000 |  |
Total | 2,497,100,000 |  |
Issuance Cost | 21,500,000 |  |
Net Proceeds | 2,475,600,000 |  |
Senior Notes | Floating Rate Notes Due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Par Value | 500,000,000.0 |  |
Discount at Issuance | 0 |  |
Total | 500,000,000.0 | 498,000,000.0 | 496,800,000
Issuance Cost | 3,500,000 |  |
Net Proceeds | 496,500,000 |  |
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 |  |
Total | 748,500,000 | 744,300,000 | 743,000,000.0
Issuance Cost | 7,400,000 |  |
Net Proceeds | 741,100,000 |  |
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 |  |
Total | 1,248,600,000 | $ 1,240,800,000 | $ 1,239,700,000
Issuance Cost | 10,600,000 |  |
Net Proceeds | $ 1,238,000,000.0 |  |

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