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DEBT - Schedule of Debt Outstanding (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018 | May 31, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt | $ 2,744.7 | $ 2,654.9 |
Less short-term debt and current maturities | (69.7) | (4.9) |
Less unamortized discounts and debt issuance costs | (18.1) | (19.4) |
Total long-term debt, net | 2,656.9 | 2,630.6 |
Commercial paper |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 65.0 | 0.0 |
Receivables Funding Facility |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 25.0 | 0.0 |
Notes, 2.30%, due June 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 500.0 | 500.0 |
Debt, interest rate | 2.30% |  |
Notes, 3.60%, due Aug 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 300.0 | 300.0 |
Debt, interest rate | 3.60% |  | 3.60%
Notes, Floating Rate, due Aug 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 300.0 | 300.0 |
Notes, 3.30%, due Dec 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 500.0 | 500.0 |
Debt, interest rate | 3.30% |  |
Notes, 3.95%, due May 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 400.0 | 400.0 |
Debt, interest rate | 3.95% |  | 3.95%
Notes, 3.25%, due June 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 275.0 | 275.0 |
Debt, interest rate | 3.25% |  |
Debentures, 6.90%, due July 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 125.0 | 125.0 |
Debt, interest rate | 6.90% |  |
Notes, 7.00%, due July 2037 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 250.0 | 250.0 |
Debt, interest rate | 7.00% |  |
Other |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 4.7 | $ 4.9 |

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