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DEBT - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Jun. 30, 2018 | Jun. 30, 2019 | May 03, 2018
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 2,200,000,000
Securitization program outstanding borrowings, maximum limit | $ 150,000,000.0 |  |  |
Securitization program, term | 3 years |  |  |
Long-term borrowings under securitization facility | $ 121,200,000 |  | $ 102,400,000 |
Weighted average interest rate, accounts receivable securitization revolving loan facility |  |  | 3.30% |
Fair Value, Inputs, Level 2 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Securitization facility, outstanding borrowings, fair value |  |  | $ 101,100,000 |
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 1,300,000,000
Line of credit facility outstanding | $ 345,000,000.0 |  | $ 360,000,000.0 |
Weighted average interest rate on debt | 4.00% |  | 3.80% |
Revolving Credit Facility | Fair Value, Inputs, Level 2 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  | $ 349,300,000 |
Standby Letters of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 60,000,000.0
Swingline Loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 60,000,000.0
Term Loan Facility | Secured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 900,000,000.0
Term Loan Facility | Secured Debt | Fair Value, Inputs, Level 2 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  | $ 881,800,000 |
Senior Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Incremental financing costs capitalized |  | $ 4,200,000 |  |
Previously capitalized financing costs, written-off |  | $ 800,000 |  |
Senior Credit Facility | Federal Funds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.50% |
Senior Credit Facility | One Month Eurodollar Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 1.00% |
Senior Credit Facility | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, commitment fee percentage |  |  | 0.15% |
Senior Credit Facility | Minimum | Eurodollar |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 1.00% |
Senior Credit Facility | Minimum | Federal Funds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.00% |
Senior Credit Facility | Minimum | Prime Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.00% |
Senior Credit Facility | Minimum | One Month Eurodollar Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.00% |
Senior Credit Facility | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit, commitment fee percentage |  |  | 0.30% |
Senior Credit Facility | Maximum | Eurodollar |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 1.75% |
Senior Credit Facility | Maximum | Federal Funds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.75% |
Senior Credit Facility | Maximum | Prime Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.75% |
Senior Credit Facility | Maximum | One Month Eurodollar Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rates available to the Company at its option |  |  | 0.75% |
Senior Credit Facility | Standby Letters of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility outstanding |  |  | $ 0 |
Letters of credit outstanding | $ 600,000 |  | 600,000 |
Term Loan A | Secured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility outstanding | $ 900,000,000 |  | $ 900,000,000.0 |
Weighted average interest rate on debt | 3.90% |  | 3.80% |
Term Loan A | Secured Debt | Secured Debt, Current |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility outstanding |  |  | $ 45,000,000.0 |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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