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DEBT - Debt Outstanding (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 | May 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |
Total debt | $ 2,654,000,000 |  | $ 2,715,300,000
Less short-term debt and current maturities | (4,000,000) |  | (965,300,000)
Less unamortized discounts and debt issuance costs | (21,600,000) |  | (11,000,000)
Total long-term debt, net | 2,628,400,000 |  | 1,739,000,000
Commercial paper |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 0 |  | 562,600,000
Revolver |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 0 |  | 100,000,000
Term Loan, due Nov 2018 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 0 |  | 400,000,000
Notes, 2.30%, due June 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 500,000,000 |  | 500,000,000
Debt, interest rate | 2.30% |  |
Debt, maturity date | 2021-06 |  |
Notes, 3.60%, due Aug 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 300,000,000 | $ 300,000,000.0 | 0
Debt, interest rate | 3.60% | 3.60% |
Notes, Floating Rate, due Aug 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 300,000,000 | $ 300,000,000.0 | 0
Notes, 3.30%, due Dec 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 500,000,000 |  | 500,000,000
Debt, interest rate | 3.30% |  |
Debt, maturity date | 2022-12 |  |
Notes, 3.95%, due May 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 400,000,000 | $ 400,000,000.0 | 0
Debt, interest rate | 3.95% | 3.95% |
Notes, 3.25%, due June 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 275,000,000 |  | 275,000,000
Debt, interest rate | 3.25% |  |
Debt, maturity date | 2026-06 |  |
Debentures, 6.90%, due July 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 125,000,000 |  | 125,000,000
Debt, interest rate | 6.90% |  |
Debt, maturity date | 2028-07 |  |
Notes, 7.00%, due July 2037 |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 250,000,000 |  | 250,000,000
Debt, interest rate | 7.00% |  |
Debt, maturity date | 2037-07 |  |
Other |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 4,000,000 |  | $ 2,700,000

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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