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DEBT - Narrative (Details) |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 14, 2020 | Feb. 04, 2020 USD ($) $ / shares | Mar. 31, 2020 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jul. 13, 2020 | Feb. 03, 2020 USD ($) | Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Term loan component of senior credit facility |  |  |  |  | $ 11,250,000 |  |  |  | $ 45,000,000
Carrying amount, liability component |  |  |  |  | 465,006,000 |  |  |  | 0
Cost of call transactions |  |  |  |  | 104,248,000 | $ 0 |  |  |
Proceeds from warrant transactions |  |  |  |  | 44,563,000 | $ 0 |  |  |
Securitization program outstanding borrowings, maximum limit |  |  |  | $ 150,000,000.0 |  |  |  |  |
Securitization program, term |  |  |  | 3 years |  |  |  |  |
Long-term borrowings under securitization facility |  |  |  |  | $ 68,700,000 |  |  |  | $ 104,500,000
Weighted average interest rate, accounts receivable securitization revolving loan facility |  |  |  |  | 1.70% |  |  |  | 2.80%
Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Securitization facility, outstanding borrowings, fair value |  |  |  |  | $ 68,500,000 |  |  |  |
Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 2,200,000,000 |
Incremental financing costs capitalized |  |  |  |  |  |  |  | $ 4,600,000 |
Previously capitalized financing costs, written-off |  |  | $ 1,200,000 |  |  |  |  |  |
Senior Credit Facility | First fiscal quarter ending after the Closing Date through June 30, 2022 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio |  |  |  |  |  |  |  | 5.00 |
Senior Credit Facility | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio | 5.0 |  |  |  |  |  |  |  |
Senior Credit Facility | Subsequent Event | First fiscal quarter ending after the Closing Date through June 30, 2022 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio |  |  |  |  |  |  | 5.0 |  |
Senior Credit Facility | Subsequent Event | Four financial quarters beginning July 1, 2020 and ending June 30, 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio | 5.5 |  |  |  |  |  |  |  |
Senior Credit Facility | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit, commitment fee percentage |  |  |  |  | 0.15% |  |  |  |
Senior Credit Facility | Minimum | Subsequent Event | Four financial quarters beginning July 1, 2020 and ending June 30, 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio | 5.0 |  |  |  |  |  |  |  |
Senior Credit Facility | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit, commitment fee percentage |  |  |  |  | 0.30% |  |  |  |
Senior Credit Facility | Maximum | Subsequent Event | Four financial quarters beginning July 1, 2020 and ending June 30, 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio | 5.5 |  |  |  |  |  |  |  |
2025 Notes | Convertible Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Incremental financing costs capitalized |  | $ 13,200,000 |  |  |  |  |  |  |
Convertible notes, maximum borrowing capacity |  | $ 575,000,000.0 |  |  | $ 575,000,000.0 |  |  |  |
Convertible notes, interest rate |  | 0.50% |  |  |  |  |  |  |
Debt proceeds, classified as equity at time of offering |  | $ 104,500,000 |  |  |  |  |  |  |
Effective interest rate |  | 4.20% |  |  |  |  |  |  |
Carrying amount, liability component |  |  |  |  | 477,200,000 |  |  |  |
Unamortized discount |  |  |  |  | 97,800,000 |  |  |  |
Fair value |  |  |  |  | 522,700,000 |  |  |  |
Initial conversion rate |  | 13.5739 |  |  |  |  |  |  |
Initial conversion price (in dollars per share) | $ / shares |  | $ 73.67 |  |  |  |  |  |  |
Maximum selling price of the company's common stock of the conversion price |  | 130.00% |  |  |  |  |  |  |
Maximum average conversion value of notes |  | 98.00% |  |  |  |  |  |  |
Redemption price, percentage |  | 100.00% |  |  |  |  |  |  |
Warrant strike price (in dollars per share) | $ / shares |  | $ 113.34 |  |  |  |  |  |  |
Cash interest |  |  |  |  | 1,200,000 |  |  |  |
Amortization of discount |  |  |  |  | 6,800,000 |  |  |  |
Interest expense |  |  |  |  | 8,000,000.0 |  |  |  |
2025 Notes | Convertible Debt | Call Option |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Cost of call transactions |  |  |  |  | 104,200,000 |  |  |  |
Proceeds from warrant transactions |  |  |  |  | $ 44,500,000 |  |  |  |
Initial strike price (in dollars per share) | $ / shares |  | $ 73.67 |  |  |  |  |  |  |
Eurodollar | Senior Credit Facility | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rates available |  |  |  |  | 1.00% |  |  |  |
Eurodollar | Senior Credit Facility | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rates available |  |  |  |  | 1.75% |  |  |  |
Eurodollar | Senior Credit Facility | Maximum | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rates available | 2.25% |  |  |  |  |  |  |  |
Overnight Federal Funds | Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rates available |  |  |  |  | 0.50% |  |  |  |
One Month Eurodollar Rate | Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rates available |  |  |  |  | 1.00% |  |  |  |
Secured Debt | Term Loan Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 877,500,000 |
Line of credit facility outstanding |  |  |  |  | $ 877,500,000 |  |  |  | $ 877,500,000
Weighted average interest rate on debt |  |  |  |  | 1.60% |  |  |  | 3.20%
Term loan component of senior credit facility |  |  |  |  | $ 11,300,000 |  |  |  |
Secured Debt | Term Loan Facility | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  |  |  | 820,000,000.0 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 1,300,000,000 |
Line of credit facility outstanding |  |  |  |  | $ 150,000,000.0 |  |  |  | $ 375,000,000.0
Weighted average interest rate on debt |  |  |  |  | 1.60% |  |  |  | 3.20%
Revolving Credit Facility | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  |  |  | $ 139,300,000 |  |  |  |
Standby Letters of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 60,000,000 |
Standby Letters of Credit | Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility outstanding |  |  |  |  | 0 |  |  |  |
Letters of credit outstanding |  |  |  |  | $ 800,000 |  |  |  | $ 800,000
Swingline Loans |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 60,000,000 |

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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=120391452&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=120398452&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=120400017&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Exercise or strike price stated in the contract for options indexed to the issuer's equity shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120519210&loc=d3e90205-114008 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879 + Details
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- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: 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(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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