GTT Communications (GTTNQ) 10-Q 8 May 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2020	May 06, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-35965
Entity Registrant Name	GTT Communications, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-2096338
Entity Address, Address Line One	7900 Tysons One Place
Entity Address, Address Line Two	Suite 1450
Entity Address, City or Town	McLean
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22102
City Area Code	703
Local Phone Number	442-5500
Title of 12(b) Security	Common stock, par value $.0001 per share
Trading Symbol	GTT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		58,819,538
Entity Central Index Key	0001315255
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 106.4	$ 41.8
Accounts receivable, net of allowances of $23.0 and $14.3, respectively	149.9	162.1
Prepaid expenses and other current assets	82.1	50.4
Total current assets	338.4	254.3
Property and equipment, net	1,765.4	1,817.4
Operating lease right of use assets	335.9	357.5
Intangible assets, net	465.4	490.7
Goodwill	1,763.7	1,768.6
Other long-term assets	70.2	69.2
Total assets	4,739	4,757.7
Current liabilities:
Accounts payable	101.4	69.4
Accrued expenses and other current liabilities	273.4	240.8
Operating lease liabilities	72.6	74.9
Finance lease liabilities	5.4	4.6
Long-term debt, current portion	29.6	30.2
Deferred revenue	83.8	67
Total current liabilities	566.2	486.9
Operating lease liabilities, long-term portion	254.7	272.9
Finance lease liabilities, long-term portion	36.4	37.3
Long-term debt, long-term portion	3,228.4	3,192.6
Deferred revenue, long-term portion	255.2	266.5
Deferred tax liabilities	167.7	171.3
Other long-term liabilities	33.6	39.1
Total liabilities	4,542.2	4,466.6
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $.0001 per share, 80,000,000 shares authorized, 58,451,083 and 56,686,459 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively	0	0
Additional paid-in capital	850.4	842.4
Accumulated deficit	(566.6)	(474.2)
Accumulated other comprehensive loss	(87)	(77.1)
Total stockholders’ equity	196.8	291.1
Total liabilities and stockholders’ equity	$ 4,739	$ 4,757.7

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 23	$ 14.3
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares, issued (in shares)	58,451,083	56,686,459
Common stock, shares, outstanding (in shares)	58,451,083	56,686,459

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Telecommunications services	$ 424.7	$ 450.2
Operating expenses:
Cost of telecommunications services	237.7	241.8
Selling, general and administrative expenses	108.2	104.1
Severance, restructuring and other exit costs	2.1	2.8
Depreciation and amortization	67.5	62.8
Operating Costs and Expenses, Total	415.5	411.5
Operating income	9.2	38.7
Other expenses:
Interest expense, net	(48.8)	(48.2)
Loss on debt extinguishment	(2.3)	0
Other expenses, net	(43.3)	(16)
Total other expenses	(94.4)	(64.2)
Loss before income taxes	(85.2)	(25.5)
(Benefit from) provision for income taxes	(1.9)	1.8
Net loss	$ (83.3)	$ (27.3)
Loss per share:
Basic (in dollars per share)	$ (1.45)	$ (0.49)
Diluted (in dollars per share)	$ (1.45)	$ (0.49)
Weighted average shares:
Basic (in shares)	57,259,699	55,839,212
Diluted (in shares)	57,259,699	55,839,212

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (83.3)	$ (27.3)
Other comprehensive loss:
Foreign currency translation adjustment	(9.9)	(35.9)
Comprehensive loss	$ (93.2)	$ (63.2)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2018		55,625,149
Balance at Dec. 31, 2018	$ 414.7	$ 0	$ 809.9	$ (368.3)	$ (26.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation for options issued	0.2		0.2
Share-based compensation for restricted stock issued (in shares)		562,385
Share-based compensation for restricted stock issued	8.5		8.5
Tax withholding related to the vesting of restricted stock (in shares)		(9,307)
Tax withholding related to the vesting of restricted stock	(0.3)		(0.3)
Stock issued in connection with employee stock purchase plan (in shares)		14,061
Stock issued in connection with employee stock purchase plan	0.1		0.1
Stock issued in connection with acquisitions (in shares)		(6,954)
Stock issued in connection with acquisitions	(0.3)		(0.3)
Stock options exercised (in shares)		41,704
Stock options exercised	0.4		0.4
Net loss	(27.3)			(27.3)
Foreign currency translation	(35.9)				(35.9)
Balance (in shares) at Mar. 31, 2019		56,227,038
Balance at Mar. 31, 2019	360.1	$ 0	818.5	(395.6)	(62.8)
Balance (in shares) at Dec. 31, 2019		56,686,459
Balance at Dec. 31, 2019	291.1	$ 0	842.4	(474.2)	(77.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation for restricted stock issued (in shares)		1,764,788
Share-based compensation for restricted stock issued	8.2		8.2
Tax withholding related to the vesting of restricted stock (in shares)		(23,783)
Tax withholding related to the vesting of restricted stock	(0.3)		(0.3)
Stock issued in connection with employee stock purchase plan (in shares)		23,619
Stock issued in connection with employee stock purchase plan	0.1		0.1
Net loss	(83.3)			(83.3)
Foreign currency translation	(9.9)				(9.9)
Balance (in shares) at Mar. 31, 2020		58,451,083
Balance at Mar. 31, 2020	$ 196.8	$ 0	$ 850.4	$ (566.6)	$ (87)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (83,300)	$ (27,300)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	67,500	62,800
Share-based compensation	8,300	8,700
Debt discount amortization	1,800	1,900
Loss on debt extinguishment	2,300	0
Amortization of debt issuance costs	1,400	1,200
Change in fair value of derivative financial liability	33,500	15,300
Excess tax benefit from stock-based compensation	1,000	300
Deferred income taxes	(4,500)	1,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	200	(53,700)
Prepaid expenses and other current assets	(32,500)	(5,400)
Other long-term assets	9,700	1,800
Accounts payable	26,200	12,100
Accrued expenses and other current liabilities	3,000	(12,100)
Operating lease liabilities	2,100	0
Deferred revenue	9,700	2,600
Other long-term liabilities	(4,900)	6,900
Net cash provided by operating activities	41,500	16,100
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	0	(500)
Purchases of property and equipment	(22,000)	(32,100)
Net cash used in investing activities	(22,000)	(32,600)
Cash flows from financing activities:
Proceeds from revolving line of credit	55,000	26,000
Repayment of revolving line of credit	(130,000)	0
Proceeds from term loans, net of original issuance discount and costs paid to lenders	131,000	0
Repayment of term loans	(6,500)	(6,500)
Repayment of other secured borrowings	(2,300)	(5,100)
Payment of holdbacks	0	(3,300)
Debt issuance costs paid to third parties	(2,300)	0
Repayment of finance leases	(2,100)	(600)
Proceeds from issuance of common stock under employee stock purchase plan	400	100
Tax withholding related to the vesting of restricted stock	(300)	(300)
Exercise of stock options	0	400
Net cash provided by financing activities	42,900	10,700
Effect of exchange rate changes on cash	2,200	1,200
Net increase (decrease) in cash, cash equivalents, and restricted cash	64,600	(4,600)
Cash, cash equivalents, and restricted cash at beginning of period	41,800	55,300
Cash, cash equivalents, and restricted cash at end of period	106,400	50,700
Supplemental disclosure of cash flow information:
Cash paid for interest	32,000	32,000
Cash paid for income taxes, net	$ 0	$ (100)

ORGANIZATION AND BUSINESS

ORGANIZATION AND BUSINESS	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND BUSINESS	ORGANIZATION AND BUSINESS Organization and Business GTT Communications, Inc. ("GTT" or the "Company") serves large enterprise and carrier clients with complex national and global networking needs, and differentiates itself from the competition by providing an outstanding service experience built on its core values of simplicity, speed and agility. The Company operates a global Tier 1 internet network ranked among the largest in the industry, and owns a fiber network that includes an expansive pan-European footprint and subsea cables. The Company's global network includes over 600 points of presence ("PoPs") spanning six continents, and the Company provides services in more than 140 countries. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") and should be read in conjunction with the Company’s audited financial statements and footnotes thereto for the fiscal year ended December 31, 2019, included in the Company’s Annual Report on Form 10-K filed on March 2, 2020. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to such rules and regulations. The condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) that are, in the opinion of management, necessary for a fair presentation of the Company’s consolidated financial position and its results of operations. The operating results for the three months ended March 31, 2020 are not necessarily indicative of the results to be expected for the full fiscal year 2020 or for any other interim period. The December 31, 2019 consolidated balance sheet is condensed from the audited financial statements as of that date. Use of Estimates and Assumptions The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts, accruals for billing disputes and exit activities, determining useful lives for depreciation and amortization, assessing the need for impairment charges (including those related to intangible assets and goodwill), determining the fair values of assets acquired and liabilities assumed in business combinations, assessing the fair value of derivative financial instruments, accounting for income taxes and related valuation allowances against deferred tax assets, and estimating the grant date fair values used to compute the share-based compensation expense. Management evaluates these estimates and judgments on an ongoing basis and makes estimates based on historical experience, current conditions, and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions, including but not limited to assumptions or conditions due to uncertainty of the magnitude and duration of the impacts of the COVID-19 pandemic in the current economic environment. Revenue Recognition The Company's revenue is derived primarily from telecommunications services, which includes both revenue from contracts with customers and lease revenues. Lease revenue services include dark fiber, duct, and colocation services. All other services are considered revenue from contracts with customers. Revenue from contracts with customers is recognized when services are provided to the customer, in an amount that reflects the consideration the Company expects to receive in exchange for those services. Lease revenue represents an arrangement where the customer has the right to use an identified asset for a specified term and such revenue is recognized over the term the customer is given exclusive access to the asset. Primary geographical market. The Company’s operations are located primarily in the United States and Europe. The nature and timing of revenue from contracts with customers across geographic markets is similar. The following table presents the Company's revenue from contracts with customers disaggregated by primary geographic market based on legal entities (in millions): Three Months Ended March 31, 2020 2019 Primary geographic market: United States $ 171.7 $ 204.2 Europe 205.3 196.5 Other 9.0 11.9 Total revenue from contracts with customers 386.0 412.6 Lease revenue 38.7 37.6 Total telecommunications services revenue $ 424.7 $ 450.2 Universal Service Fund ("USF"), Gross Receipts Taxes and Other Surcharges. USF fees and other surcharges billed to customers and recorded on a gross basis (as service telecommunications services revenue and cost of telecommunications services) were $5.6 million and $5.9 million for the three months ended March 31, 2020 and 2019, respectively. Contract balances. Contract assets consist of conditional or unconditional rights to consideration. Accounts receivable represent amounts billed to customers where the Company has an enforceable right to payment for performance completed to date (i.e., unconditional rights to consideration). The Company does not have contract assets that represent conditional rights to consideration. The Company’s accounts receivable balance at March 31, 2020 and December 31, 2019 includes $134.4 million and $145.9 million, respectively, related to contracts with customers. There were no other contract assets as of March 31, 2020 or December 31, 2019. Contract liabilities are generally limited to deferred revenue. Deferred revenue is a contract liability, representing advance consideration received from customers primarily related to the pre-paid capacity sales, where transfer of control occurs over time, and therefore revenue is recognized over the related contractual service period. The Company's contract liabilities were $82.0 million and $76.0 million as of March 31, 2020 and December 31, 2019, respectively. The change in contract liabilities during the three months ended March 31, 2020 included $3.8 million for revenue recognized that was included in the contract liability balance as of January 1, 2020 and $10.7 million for new contract liabilities net of amounts recognized as revenue during the three months ended March 31, 2020. The following table includes estimated revenue from contracts with customers expected to be recognized for each of the years subsequent to March 31, 2020 related to performance obligations that are unsatisfied (or partially unsatisfied) at March 31, 2020 and have an original expected duration of greater than one year (amounts in millions): 2020 remaining $ 13.7 2021 15.2 2022 14.4 2023 12.8 2024 8.0 2025 and beyond 17.9 $ 82.0 For a table of estimated revenue to be recognized for consolidated deferred revenue for each of the years subsequent to March 31, 2020 refer to Note 6 - Deferred revenue. Deferred costs to obtain a contract. Deferred sales commissions were $24.7 million and $23.0 million as of March 31, 2020 and December 31, 2019, respectively. There were no other significant amounts of assets recorded related to contract costs as of March 31, 2020 or December 31, 2019. Property and Equipment Depreciation expense associated with property and equipment, including amortization of finance lease assets, was $46.4 million and $40.7 million for the three months ended March 31, 2020 and 2019, respectively. The Company capitalized labor costs, including indirect and overhead costs, of $3.8 million and $4.2 million for the three months ended March 31, 2020 and 2019, respectively. The Company capitalized software costs of $1.1 million and $1.1 million for the three months ended March 31, 2020 and 2019, respectively. The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. If the carrying amount of an asset were to exceed its estimated future undiscounted cash flows, the asset would be considered to be impaired. Impairment losses would then be measured as the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of, if any, are reported at the lower of the carrying amount or fair value less costs to sell. Disputed Supplier Expenses In the normal course of business, the Company identifies errors by suppliers with respect to the billing of services. The Company performs bill verification procedures to ensure that errors in the Company's suppliers' billed invoices are identified and resolved. If the Company concludes that a vendor has billed inaccurately, the Company will record a liability only for the amount that it believes is owed. As of March 31, 2020 and December 31, 2019, the Company had open disputes not accrued for of $28.8 million and $12.2 million, respectively, and open paid disputes in the form of receivables from suppliers of $36.0 million and $10.7 million, respectively. Newly Adopted Accounting Principles In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , and subsequent amendment to the initial guidance, ASU 2018-19, in November 2018. The updated guidance introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019. The standard requires a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company adopted ASU 2016-13 as of January 1, 2020 using the modified retrospective approach related to its accounts receivables, resulting in a cumulative adjustment to retained earnings of approximately $9.1 million. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement , which modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019. The removed and modified disclosures are adopted on a retrospective basis and the new disclosures are adopted on a prospective basis. The Company adopted the guidance as of January 1, 2020. The adoption of the new standard did not have a material impact on the Company's condensed consolidated financial statements. Recent Accounting Pronouncements Other recent accounting pronouncements issued by the FASB during 2020 and through the filing date did not and are not believed by management to have a material impact on the Company's present or historical consolidated financial statements.

BUSINESS ACQUISITIONS

BUSINESS ACQUISITIONS	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
BUSINESS ACQUISITIONS	BUSINESS ACQUISITIONS Since its formation, the Company has consummated a number of transactions accounted for as business combinations as part of its growth strategy. The acquisitions of these businesses, which are in addition to periodic purchases of client contracts, have allowed the Company to increase the scale at which it operates, which in turn affords the Company the ability to increase its operating leverage, extend its network, and broaden its client base. The accompanying condensed consolidated financial statements include the operations of the acquired entities from their respective acquisition dates. All of the acquisitions have been accounted for as a business combination. Accordingly, consideration paid by the Company to complete the acquisitions is initially allocated to the acquired assets and liabilities based upon their estimated acquisition date fair values. The recorded amounts for assets acquired and liabilities assumed are provisional and subject to change during the measurement period, which is up to 12 months from the acquisition date. There were no acquisitions completed during the three months ended March 31, 2020. For material acquisitions completed during 2019, 2018, and 2017, refer to Note 3 - Business Acquisitions to the consolidated financial statements contained in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019. During the three months ended March 31, 2020, certain immaterial measurement period adjustments were recorded to adjust provisional amounts for acquisitions completed during 2019. Acquisition Method Accounting Estimates The Company initially recognizes the assets and liabilities acquired from the acquisitions based on its preliminary estimates of their acquisition date fair values. As additional information becomes known concerning the acquired assets and assumed liabilities, management may make adjustments to the opening balance sheet of the acquired company up to the end of the measurement period, which is a period of no longer than one year following the acquisition date. The determination of the fair values of the acquired assets and liabilities assumed (and the related determination of estimated lives of depreciable tangible and identifiable intangible assets) requires significant judgment. Transaction Costs Transaction costs describe the broad category of costs the Company incurs in connection with signed and/or closed acquisitions. There are two types of costs that the Company accounts for: • Severance, restructuring and other exit costs • Transaction and integration costs Severance, restructuring and other exit costs include severance and other one-time benefits for terminated employees, termination charges for leases and supplier contracts, and other costs incurred associated with an exit activity. These costs are reported separately in the condensed consolidated statements of operations during the three months ended March 31, 2020 and 2019. Refer to Note 12 - Severance, Restructuring, and Other Exit Costs of these condensed consolidated financial statements for further information.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS The goodwill balance was $1,763.7 million and $1,768.6 million as of March 31, 2020 and December 31, 2019, respectively. Additionally, the Company's intangible asset balance was $465.4 million and $490.7 million as of March 31, 2020 and December 31, 2019, respectively. The change in the carrying amount of goodwill for the three months ended March 31, 2020 was as follows (amounts in millions): Goodwill - December 31, 2019 $ 1,768.6 Adjustments to 2019 business combinations (0.6) Foreign currency translation adjustments (4.3) Goodwill - March 31, 2020 $ 1,763.7 Goodwill is reviewed for impairment at least annually, in October, or more frequently if a triggering event occurs between impairment testing dates. There were no triggering events or goodwill impairments identified for the three months ended March 31, 2020 and 2019. The following table summarizes the Company’s intangible assets as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Amortization Gross Asset Cost Accumulated Amortization Net Book Value Gross Asset Cost Accumulated Amortization Net Book Value Customer lists 3-20 years $ 775.2 $ 331.7 $ 443.5 $ 781.1 $ 313.7 $ 467.4 Non-compete agreements 3-5 years 4.7 4.7 — 4.7 4.6 0.1 Intellectual property 10 years 38.0 16.3 21.7 38.3 15.4 22.9 Tradename 1-3 years 6.1 5.9 0.2 6.2 5.9 0.3 $ 824.0 $ 358.6 $ 465.4 $ 830.3 $ 339.6 $ 490.7 Amortization expense was $21.1 million and $22.1 million for the three months ended March 31, 2020 and 2019, respectively. Estimated amortization expense related to intangible assets subject to amortization at March 31, 2020 in each of the years subsequent to March 31, 2020 is as follows (amounts in millions): 2020 remaining $ 63.3 2021 82.6 2022 69.5 2023 57.0 2024 51.5 2025 and beyond 141.5 Total $ 465.4 The Company reviews its intangible assets for impairment whenever events or circumstances indicate that the carrying amount of an asset may not be fully recoverable. There were no triggering events or intangible asset impairments recognized for the three months ended March 31, 2020 and 2019.

PREPAID EXPENSES AND OTHER CURR

PREPAID EXPENSES AND OTHER CURRENT ASSETS	3 Months Ended
	Mar. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
PREPAID EXPENSES AND OTHER CURRENT ASSETS	PREPAID EXPENSES AND OTHER CURRENT ASSETS The following table summarizes the Company’s prepaid expenses and other current assets as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Receivables from suppliers $ 36.0 $ 10.7 Prepaid cost of telecommunications services 19.4 11.8 Prepaid selling, general and administrative 12.6 13.1 Deferred commissions 11.3 9.8 Other 2.8 5.0 $ 82.1 $ 50.4

ACCRUED EXPENSES AND OTHER CURR

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	3 Months Ended
	Mar. 31, 2020
Payables and Accruals [Abstract]
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES The following table summarizes the Company’s accrued expenses and other current liabilities as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Cost of telecommunications services $ 91.7 $ 105.3 Interest rate swaps 86.7 53.5 Compensation and benefits 25.6 24.4 Taxes payable 26.2 28.3 Selling, general and administrative 19.4 18.1 Interest 11.8 0.4 Restructuring, current portion 6.7 6.4 Other 5.3 4.4 $ 273.4 $ 240.8

DEFERRED REVENUE

DEFERRED REVENUE	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
DEFERRED REVENUE	DEFERRED REVENUE Total deferred revenue as of March 31, 2020 and December 31, 2019 was $339.0 million and $333.5 million, respectively, consisting of unamortized prepaid services, IRUs, and deferred non-recurring revenue. Deferred revenue is recognized as current and long-term deferred revenue on the condensed consolidated balance sheets. Significant changes in deferred revenue balances during the period are as follows (amounts in millions): Three Months Ended March 31, 2020 Contract Term Less than 1 Year Greater than 1 Year Total Balance, December 31, 2019 $ 22.5 $ 311.0 $ 333.5 Revenue recognized from beginning balance (17.9) (10.3) (28.2) Increase in deferred revenue (gross) 49.2 10.9 60.1 Revenue recognized on increase in deferred revenue (22.0) (0.2) (22.2) Foreign currency translation adjustments (0.1) (4.1) (4.2) Balance, March 31, 2020 $ 31.7 $ 307.3 $ 339.0 Remaining amortization at March 31, 2020 and in each of the years subsequent to March 31, 2020 is as follows (amounts in millions): Contract Term Less than 1 Year Greater than 1 Year Total 2020 remaining $ 31.6 $ 32.7 $ 64.3 2021 0.1 41.3 41.4 2022 — 37.8 37.8 2023 — 36.0 36.0 2024 — 28.2 28.2 2025 and beyond — 131.3 131.3 $ 31.7 $ 307.3 $ 339.0

DEBT

DEBT	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
DEBT	DEBT As of March 31, 2020 and December 31, 2019, long-term debt was as follows (amounts in millions): March 31, 2020 December 31, 2019 US Term loan due 2025 $ 1,739.0 $ 1,743.5 EMEA Term loan due 2025 951.5 828.8 7.875% Senior unsecured notes due 2024 575.0 575.0 Revolving line of credit due 2023 65.0 140.0 Other secured loans 2.1 4.3 Total debt obligations 3,332.6 3,291.6 Unamortized debt issuance costs (26.6) (28.0) Unamortized original issuance discount, net (48.0) (40.8) Carrying value of debt 3,258.0 3,222.8 Less current portion (29.6) (30.2) Long-term debt less current portion $ 3,228.4 $ 3,192.6 2018 Credit Agreement On May 31, 2018, the Company entered into a credit agreement (the "2018 Credit Agreement") that provides for (1) a $1,770.0 million term loan B facility (the "US Term Loan Facility"), (2) a €750.0 million term loan B facility (the "EMEA Term Loan Facility"), and (3) a $200.0 million revolving credit facility (the "Revolving Line of Credit Facility") (which includes a $50.0 million letter of credit facility). The US Term Loan Facility was issued at an original issuance discount of $8.9 million and the EMEA Term Loan Facility was issued at an original issuance discount of €3.8 million. The Company is the borrower under the U.S. Term Loan Facility and the Revolving Line of Credit Facility. The Company's wholly-owned subsidiary GTT Communications B.V. is the borrower under the EMEA Term Loan Facility (the "EMEA Borrower"). The maturity date of the US Term Loan Facility and the EMEA Term Loan Facility (collectively the "Term Loan Facilities") is May 31, 2025 and the maturity date of the Revolving Line of Credit Facility is May 31, 2023. Each maturity date may be extended per the terms of the 2018 Credit Agreement. The principal amounts of the US Term Loan Facility and EMEA Term Loan Facility are payable in equal quarterly installments of $4.425 million and €1.875 million, respectively, commencing on September 30, 2018 and continuing thereafter until the maturity date when the remaining balances of outstanding principal amount is payable in full. The Company may prepay loans under the 2018 Credit Agreement at any time, subject to certain notice requirements, LIBOR breakage costs, and prepayment fees noted above. At the Company’s election, the US Term Loan Facility may be made as either Base Rate Loans or Eurocurrency Loans. The EMEA Term Loan Facility will bear interest at the European Money Markets Institute EURIBOR plus the applicable margin. The applicable margin for the US Term Loan Facility is 1.75% for Base Rate Loans and 2.75% for Eurocurrency Loans, subject to a “LIBOR floor” of 0.00%. The applicable margin for the EMEA Term Loan Facility is 3.25%, subject to a “EURIBOR floor” of 0.00%. The applicable margin for revolving loans under the Revolving Line of Credit Facility is 1.75% for Base Rate Loans, 2.75% for Eurocurrency Loans denominated in U.S. Dollars and certain other approved currencies other than Euros, and 3.25% for revolving loans denominated in Euros. The proceeds from the US Term Loan Facility and EMEA Term Loan Facility were used to finance the acquisition of Interoute Communications Holdings S.A., to repay amounts outstanding under the Company's prior term loan facility, and to pay costs associated with such transactions. On June 5, 2019, the Company entered into an Incremental Revolving Credit Assumption Agreement ("Incremental Agreement") to the 2018 Credit Agreement. The Incremental Agreement establishes $50.0 million in new revolving credit commitments, bringing the total sum of revolving credit commitments under the 2018 Credit Agreement, as modified by the Incremental Agreement, to $250.0 million. The revolving credit commitments made pursuant to the Incremental Agreement have terms and conditions identical to the existing revolving credit commitments under the 2018 Credit Agreement. On February 28, 2020, the Company entered into an amendment to the 2018 Credit Agreement (“Amendment No. 2”), which established incremental term loan commitments for $140 million of EMEA term loans (the “2020 EMEA Term Loan Facility”), bringing the total amounts of EMEA term loans outstanding under the 2018 Credit Agreement, as modified by Amendment No. 2, to €750 million in Euro-denominated loans and $140 million in US Dollar-denominated loans. The EMEA term loans under the 2020 EMEA Term Loan Facility were incurred with an original issue discount of $5.6 million. The 2020 EMEA Term Loan Facility has terms substantially identical to the existing EMEA Term Loan Facility, except that: (1) each quarterly amortization payment on the 2020 EMEA Term Loan Facility will be $350,000; (2) the EMEA Term Loan Facility has a prepayment penalty of 2.0% for certain mandatory and voluntary prepayments occurring on or prior to the one year anniversary of the effective date of the EMEA Term Loan Facility and 1.0% for certain mandatory and voluntary prepayments occurring following the one year anniversary of the effective date of the EMEA Term Loan Facility and until the second year anniversary thereof; (3) Amendment No. 2 added, for the benefit of the lenders under the 2020 EMEA Term Loan Facility, the same covenant restrictions contained in Amendment No. 1, except that (a) the amount of secured debt that can be incurred on a pari passu basis with the 2020 EMEA Term Loan Facility and certain types of debt incurred by non-credit parties is limited to $50 million in the aggregate and (b) certain excess asset sale proceeds will be required to prepay outstanding EMEA term loans or reinvest in long-term assets useful in the business within 30 days following receipt of such proceeds, which covenant restrictions will remain in place for so long as the existing Revolving Line of Credit Facility and the 2020 EMEA Term Loan Facility remain in effect; and (4) the applicable margin for the 2020 EMEA Term Loan Facility is (a) 3.25% for Base Rate Loans and 4.25% for Eurocurrency Loans for the first two years following the effective date of the 2020 EMEA Term Loan Facility and (b) 3.75% for Base Rate Loans and 4.75% for Eurocurrency Loans on and following the second anniversary of the effective date of the 2020 EMEA Term Loan Facility. The proceeds of the 2020 EMEA Term Loan Facility were used to repay amounts outstanding under the Revolving Line of Credit Facility and for general corporate purposes. The unused and available amount of the Revolving Line of Credit Facility at March 31, 2020 was as follows (amounts in millions): Committed capacity $ 250.0 Borrowings outstanding (65.0) Letters of credit issued (10.9) Unused and available $ 174.1 The obligations of the Company under the 2018 Credit Agreement are secured by the substantial majority of the tangible and intangible assets of the Company. The obligations of the Company under the U.S. Term Loan Facility and the Revolving Line of Credit Facility are guaranteed by certain of its domestic subsidiaries, but not by any of the Company’s foreign subsidiaries. The obligations of the EMEA Borrower under the EMEA Term Loan Facility are guaranteed by the Company and certain of its domestic and foreign subsidiaries. None of the foreign subsidiary guarantors of the EMEA Term Loan Facility provide cross-guarantees of the guarantees of the EMEA Term Loan Facility provided by the Company and its domestic subsidiaries. The 2018 Credit Agreement does not contain a financial covenant for the US Term Loan Facility or the EMEA Term Loan Facility, but it does include a maximum Consolidated Net Secured Leverage Ratio applicable to the Revolving Line of Credit Facility in the event that utilization exceeds 30% of the revolving loan facility commitment. At March 31, 2020, the Company's utilization (as defined) of the Revolving Line of Credit Facility commitment was approximately 26%. On August 8, 2019, the Company entered into Amendment No. 1 to the 2018 Credit Agreement, which amends the Consolidated Net Secured Leverage Ratio applicable to the Revolving Line of Credit Facility for each fiscal quarter ending September 30, 2019 through December 31, 2020. If triggered, the covenant, as amended, requires the Company to maintain a Consolidated Net Secured Leverage Ratio, on a Pro Forma Basis, below the maximum ratio specified as follows: Fiscal Quarter Ending Maximum Ratio March 31, 2020 6.50:1 June 30, 2020 6.50:1 September 30, 2020 6.25:1 December 31, 2020 6.25:1 March 31, 2021 5.50:1 June 30, 2021 5.00:1 September 30, 2021 5.00:1 December 31, 2021 4.50:1 March 31, 2022 4.50:1 June 30, 2022 and thereafter 4.25:1 While the financial covenant was not required to be measured as a result of the utilization level of the Revolving Line of Credit Facility as of March 31, 2020, the Company's Consolidated Net Secured Leverage Ratio, as defined in the 2018 Credit Agreement, was approximately 6.53:1. In addition, Amendment No. 1 to the 2018 Credit Agreement added certain restrictions, which remain in place from the effective date of the Amendment No. 1 until the delivery of the compliance certificate for the quarter ending March 31, 2021, demonstrating compliance with the Consolidated Net Secured Leverage Ratio for that quarter, including without limitation the following: the Company and its restricted subsidiaries (as defined in the 2018 Credit Agreement) may not make certain dividends, distributions and other restricted payments (as defined in the 2018 Credit Agreement), including that the Company may not pay dividends; the Company and its restricted subsidiaries may not designate any subsidiary an “Unrestricted Subsidiary” (which would effectively remove such subsidiary from the restrictions of the 2018 Credit Agreement); the Company and its restricted subsidiaries may not make “permitted acquisitions” (as defined in the 2018 Credit Agreement) or certain other investments, unless the Company and its restricted subsidiaries have liquidity (i.e., unrestricted cash and cash equivalents and availability under the revolving credit facility under the 2018 Credit Agreement) of at least $250 million (other than the acquisition of KPN Eurorings B.V., a private limited liability company ( besloten vennootschap met beperkte aansprakelijkheid ) incorporated under the laws of the Netherlands with respect to which this liquidity requirement is not applicable); and the amount of incremental borrowings under the 2018 Credit Agreement that the Company and its subsidiaries may request when the Consolidated Net Secured Leverage Ratio is above 4.40 to 1.00 the Company and its subsidiaries was reduced to $300 million minus amounts previously requested (which amount is $50 million requested under the Incremental Agreement described above). Interest Rate Swaps In April and May 2018, the Company entered into the following interest rate swap arrangements to partially mitigate the variability of cash flows due to changes in the Eurodollar rate, specifically related to interest payments on our term loans under the 2018 Credit Agreement: Trade date April 6, 2018 May 17, 2018 May 17, 2018 May 17, 2018 Notional amount (in millions) $ 500.0 $ 200.0 $ 300.0 € 317.0 Term (years) 5 7 3 7 Effective date 4/30/2018 6/29/2018 6/29/2018 6/29/2018 Termination date 4/30/2023 5/31/2025 6/30/2021 5/31/2025 Fixed rate 2.6430 % 3.0370 % 2.8235 % 0.8900 % Floating rate 1-month LIBOR 1-month LIBOR 1-month LIBOR 1-month EURIBOR The interest rate swaps do not qualify for hedge accounting. The fair value of the interest rate swaps at March 31, 2020 and December 31, 2019 was as follows (in millions): Fair Value March 31, 2020 December 31, 2019 Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Interest rate swap $ 500.0 4/30/2018 4/30/2023 $ — $ (36.1) $ — $ (18.2) Interest rate swap $ 200.0 6/29/2018 5/31/2025 — (27.1) — (15.3) Interest rate swap $ 300.0 6/29/2018 6/30/2021 — (9.5) — (5.8) Interest rate swap € 317.0 6/29/2018 5/31/2025 — (14.0) — (14.2) $ — $ (86.7) $ — $ (53.5) The Company records the fair value of interest rate swaps in its condensed consolidated balance sheets within prepaid expenses and other current assets when in an asset position and within accrued expenses and other current liabilities when in a liability position. Due to the change in fair value of its interest rate swaps, the Company recognized a loss of $33.5 million and $15.3 million in other expense, net for the three months ended March 31, 2020 and 2019, respectively. 7.875% Senior Unsecured Notes During 2016 and 2017, the Company completed three private offerings for $575.0 million aggregate principal amount of its 7.875% senior unsecured notes due in 2024 (collectively the “7.875% Senior Unsecured Notes”). Each offering was treated as a single series of debt securities. The 7.875% Senior Unsecured Notes have identical terms other than the issuance date and offering price. The 7.875% Senior Unsecured Notes were issued at a combined premium of $16.5 million. The 7.875% Senior Unsecured Notes are guaranteed by the Company’s domestic subsidiaries that guarantee the Company’s obligations under the U.S. Term Loan Facility and the Revolving Line of Credit Facility, but not by any of the Company’s foreign subsidiaries. We are in compliance with the subsidiary guarantee requirements for the 7.875% Senior Unsecured Notes. Other Secured Loans In connection with the Interoute acquisition in May 2018, the Company acquired other loans secured by certain network assets. The balance of other secured loans at March 31, 2020 and December 31, 2019 was $2.1 million and $4.3 million, respectively. Effective Interest Rate The effective interest rate on the Company's long-term debt at March 31, 2020 and December 31, 2019 was 5.2% and 5.2%, respe ctively. The effective interest rate considers the impact of the interest rate swaps. Long-term Debt Contractual Maturities The aggregate contractual maturities of long-term debt (excluding unamortized debt issuance costs and unamortized original issuance discounts and premiums) were as follows as of March 31, 2020 (amounts in millions): Total Debt 2020 remaining $ 22.9 2021 27.3 2022 27.5 2023 92.5 2024 602.4 2025 and beyond 2,560.0 $ 3,332.6 Debt Issuance Costs and Original Issuance Discounts and Premiums The following table summarizes the debt issuance costs activity for the three months ended March 31, 2020 (amounts in millions): US Term Loan EMEA Term Loan 7.875% Senior Unsecured Notes Revolving Line of Credit Total Balance, December 31, 2019 $ (9.9) $ (2.7) $ (12.3) $ (3.1) $ (28.0) Debt issuance costs incurred — (2.3) — — (2.3) Amortization 0.4 0.3 0.5 0.2 1.4 Loss on debt extinguishment — 2.3 — — 2.3 Balance, March 31, 2020 $ (9.5) $ (2.4) $ (11.8) $ (2.9) $ (26.6) Debt issuance costs are presented in the condensed consolidated balance sheets as a reduction to long-term debt. Interest expense associated with the amortization of debt issuance costs was $1.4 million and $1.2 million for the three months ended March 31, 2020 and 2019, respectively. The following table summarizes the original issuance (discount) and premium activity for the three months ended March 31, 2020 (amounts in millions): US Term Loan EMEA Term Loan 7.875% Senior Unsecured Notes Total Balance, December 31, 2019 $ (34.2) $ (18.7) $ 12.1 $ (40.8) New Original Issuance Discount — (5.6) — (5.6) Fees paid to lenders — (3.4) — (3.4) Amortization 1.4 0.9 (0.5) 1.8 Balance, March 31, 2020 $ (32.8) $ (26.8) $ 11.6 $ (48.0) Original issuance discounts and premiums are presented in the condensed consolidated balance sheets as a reduction to long-term debt. Amortization of original issuance discounts and premiums was $1.8 million and $1.9 million for the three months ended March 31, 2020 and 2019, respectively.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS The Company measures certain financial assets and liabilities at fair value on a recurring basis. For additional information on the Company's fair value policies refer to Note 2 - Significant Accounting Policies to the consolidated financial statements contained in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019. Recurring Fair Value Measurements The following table presents the Company's financial assets and liabilities that are required to be measured and recognized at fair value on a recurring basis classified under the appropriate level of the fair value hierarchy as of March 31, 2020 and December 31, 2019. There were no transfers between Level 1 and Level 2 during the three months ended March 31, 2020 and 2019. March 31, 2020 Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Total Level 1 Level 2 Level 3 Assets: Interest rate swap agreements $ — $ — $ — $ — Liabilities: Interest rate swap agreements $ (86.7) $ — $ (86.7) $ — December 31, 2019 Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Total Level 1 Level 2 Level 3 Assets: Interest rate swap agreements $ — $ — $ — $ — Liabilities: Interest rate swap agreements $ (53.5) $ — $ (53.5) $ — Non-recurring Fair Value Measurements In addition to assets and liabilities that are recorded at fair value on a recurring basis, the Company records assets and liabilities at fair value on a non-recurring basis as required by GAAP. Assets measured at fair value on a non-recurring basis include goodwill, tangible assets, and intangible assets. Such assets are reviewed quarterly for impairment indicators. If a triggering event has occurred, the assets are re-measured when the estimated fair value of the corresponding asset group is less than the carrying value. The fair value measurements, in such instances, are based on significant unobservable inputs (Level 3). Other Fair Value Measurements As of March 31, 2020 and December 31, 2019, the carrying amounts reflected in the accompanying consolidated balance sheets for cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities approximated fair value due to the short-term nature of these instruments. The table below presents the fair values for the Company's long-term debt as well as the input level used to determine these fair values as of March 31, 2020 and December 31, 2019. The carrying amounts exclude any debt issuance costs or original issuance discount (amounts in millions): Fair Value Measurement Using Total Carrying Value in Consolidated Balance Sheet Unadjusted Quoted Prices in Active Markets for Identical Assets or Liabilities (1) (Level 1) March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Liabilities not recorded at fair value in the Financial Statements: Long-term debt, including the current portion: US Term loan due 2025 $ 1,739.0 $ 1,743.5 $ 1,208.6 $ 1,464.5 EMEA Term loan due 2025 951.5 828.8 777.9 787.9 7.875% Senior unsecured notes due 2024 575.0 575.0 370.9 435.6 Revolving line of credit due 2023 65.0 140.0 65.0 140.0 Other secured loans 2.1 4.3 2.1 4.3 Total long-term debt, including current portion $ 3,332.6 $ 3,291.6 $ 2,424.5 $ 2,832.3 (1) Fair value based on the bid quoted price, except for the revolving line of credit and other secured loans for which carrying value approximates fair value.

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION Share-Based Compensation Plan The Company grants share-based equity awards, including stock options and restricted stock, under the GTT Communications, Inc. 2018 Stock Option and Incentive Plan (the "GTT Stock Plan"). The GTT Stock Plan is limited to an aggregate 14,250,000 shares of which 12,622,117 have been issued and are outstanding as of March 31, 2020. The GTT Stock Plan permits the granting of time-based stock options, time-based restricted stock, and performance-based restricted stock to employees and consultants of the Company, and non-employee directors of the Company. Time-based options granted under the GTT Stock Plan have an exercise price of at least 100% of the fair market value of the underlying stock on the grant date and expire no later than 10 years from the grant date. The Company uses the Black-Scholes option-pricing model to determine the fair value of its stock option awards at the time of grant. The stock options generally vest over four years with 25% of the options becoming exercisable one year from the date of grant and the remaining vesting annually or quarterly over the following three years. Time-based restricted stock granted under the GTT Stock Plan is valued at the share price of our common stock as reported on the NYSE on the date of grant. Time-based restricted stock generally vests over four years with 25% of the shares becoming unrestricted one year from the date of grant and the remaining vesting 75% annually or quarterly over the following three years. Performance-based restricted stock is granted under the GTT Stock Plan subject to the achievement of certain performance measures. Once achievement of these performance measures is considered probable, the Company starts to expense the fair value of the grant over the vesting period. The performance-based restricted stock is valued at the share price of our common stock as reported on the NYSE on the date of grant. The performance grant vests quarterly over the vesting period once achievement of the performance measure has been met and approved by the Compensation Committee, typically one The Compensation Committee of the Board of Directors, as administrator of the GTT Stock Plan, has the discretion to authorize a different vesting schedule for any awards. In 2019, the Company implemented a sell-to-cover program for employees who elect to sell shares to cover any withholding taxes due upon vesting. Previously the Company netted shares upon vesting and paid the withholding taxes directly. Share-Based Compensation Expense The following tables summarize the share-based compensation expense recognized as a component of selling, general and administrative expenses in the condensed consolidated statements of operations (amounts in millions): Three Months Ended March 31, 2020 2019 Stock options $ — $ 0.2 Restricted stock 8.2 8.3 ESPP 0.1 0.2 Total $ 8.3 $ 8.7 As of March 31, 2020, there was $50.1 million of total unrecognized compensation cost related to unvested share-based compensation awards. The following table summarizes the unrecognized compensation cost and the weighted average period over which the cost is expected to be amortized (amounts in millions): March 31, 2020 Unrecognized Compensation Cost Weighted Average Remaining Period to be Recognized (Years) Time-based stock options $ — 0.25 Time-based restricted stock 48.1 2.64 Performance-based restricted stock (1) 2.0 0.25 Total $ 50.1 2.54 (1) Excludes $8.1 million, $25.1 million, and $12.1 million of unrecognized compensation cost related to the 2020 Performance Awards, 2018 Performance Awards, and 2017 Performance Awards, respectively, where achievement of the performance criteria was not probable as of March 31, 2020. The following table summarizes the restricted stock granted during the three months ended March 31, 2020 and 2019 (amounts in millions, except shares data): Three Months Ended March 31, 2020 2019 Time-based restricted stock granted 1,183,525 598,141 Fair value of time-based restricted stock granted $ 14.6 $ 19.3 Performance-based restricted stock granted 651,350 24,000 Fair value of performance-based restricted stock granted $ 8.1 $ 0.8 No stock options were issued in any period presented. Performance-based Restricted Stock The Company granted $17.4 million of restricted stock during 2015 and 2017 contingent upon the achievement of certain performance criteria (the "2015 Performance Awards"). The fair value of the 2015 Performance Awards was calculated using the value of GTT common stock on the respective grant dates. Upon announcement of the Hibernia acquisition in November 2016, the achievement of two of the four performance criteria became probable and the Company started recognizing share-based compensation expense for these grants. Expense recognition concluded during the first quarter of 2019. Additionally, upon announcement of the Global Capacity acquisition in June 2017, the achievement of the final two performance criteria became probable and the Company started recognizing share-based compensation expense for these grants. The Company did not recognize share-based compensation expense related to the 2015 Performance awards during the three months ended March 31, 2020 as the awards were fully vested. The Company recognized share-based compensation expense related to the 2015 Performance Awards of $1.1 million for the three months ended March 31, 2019. As of December 31, 2019, the 2015 Performance Awards were fully vested, and accordingly, the Company recognized no share-based compensation expense for the three months ended March 31, 2020. The Company granted $32.6 million of restricted stock during 2017 and 2018 contingent upon the achievement of certain performance criteria (the "2017 Performance Awards"). The fair value of the 2017 Performance Awards was calculated using the value of GTT common stock on the grant date. Upon the closing of the Interoute acquisition in May 2018, the achievement of two of the four performance criteria became probable and the Company started recognizing share-based compensation expense for these grants. Expense recognition is expected to continue through the second quarter of 2020. The Company recognized share-based compensation expense related to the 2017 Performance Awards of $1.0 million and $1.8 million for the three months ended March 31, 2020 and 2019, respectively. As of March 31, 2020, $5.4 million of unvested 2017 Performance Awards had been forfeited due to departures and remaining unrecognized compensation cost related to the unvested 2017 Performance Awards was $13.8 million, inclusive of unrecognized compensation cost where achievement of the performance criteria was not probable as of March 31, 2020. The Company granted $31.2 million of restricted stock during 2018 and 2019 contingent upon the achievement of certain performance criteria (the "2018 Performance Awards"). The fair value of the 2018 Performance Awards was calculated using the value of GTT common stock on the grant date. As of March 31, 2020, achievement of the performance criteria was not probable. Accordingly, the Company recognized no share-based compensation expense for the three months ended March 31, 2020. As of March 31, 2020, $6.1 million of unvested 2018 Performance Awards had been forfeited due to departures and remaining unrecognized compensation cost related to the unvested 2018 Performance Awards was $25.1 million. The Company granted $8.1 million of restricted stock during the three months ended March 31, 2020 contingent upon the achievement of certain performance criteria ("the 2020 Performance Awards"). The fair value of the 2020 Performance Awards was calculated using the value of GTT common stock on the grant date. As of March 31, 2020, achievement of the performance criteria was not probable. Accordingly, the Company recognized no share-based compensation expense for the three months ended March 31, 2020. Employee Stock Purchase Plan

LOSS PER SHARE

LOSS PER SHARE	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
LOSS PER SHARE	LOSS PER SHARE Basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding. Diluted loss per share reflects, in periods with earnings and in which it has a dilutive effect, the effect of common shares issuable upon exercise of stock options and warrants. The table below details the calculations of loss per share (in millions, except for share and per share amounts): Three Months Ended March 31, 2020 2019 Numerator for basic and diluted EPS – net loss available to common stockholders $ (83.3) $ (27.3) Denominator for basic EPS – weighted average shares 57,259,699 55,839,212 Effect of dilutive securities — — Denominator for diluted EPS – weighted average shares 57,259,699 55,839,212 Loss per share: Basic $ (1.45) $ (0.49) Diluted $ (1.45) $ (0.49)

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXESThe Company’s provision for income taxes is determined using an estimate of its annual effective tax rate, adjusted for the effect of discrete items arising in the quarter. Each quarter the Company updates its estimate of the annual effective tax rate. The quarterly tax provision and the quarterly estimate of the Company's annual effective tax rate is subject to significant variation due to several factors, including variability in accurately predicting pre-tax and taxable income (loss) and the mix of jurisdictions to which they relate, effects of acquisitions and integrations, audit-related developments, changes in the Company's stock price, foreign currency gains (losses), and tax law developments. Additionally, the Company's effective tax rate may be more or less volatile based on the amount of pre-tax income or loss and impact of discrete items. The Company recorded a (benefit from) provision for income taxes of $(1.9) million and $1.8 million for the three months ended March 31, 2020 and 2019, respectively. The Company assesses the available positive and negative evidence to estimate whether sufficient future taxable income will be generated to permit use of the Company's existing deferred tax assets. A significant piece of objective negative evidence identified during the Company's evaluation was the cumulative loss incurred over the three On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was signed into law in response to the COVID-19 pandemic. The CARES Act provides numerous tax provisions and stimulus measures, including temporary changes regarding the prior and future utilization of net operating losses, temporary changes to the prior and future limitations on interest deductions, and technical corrections from prior tax legislation for tax depreciation of certain qualified improvement property. The Company has evaluated the provisions of the CARES Act relating to income taxes which will result in adjustments to certain deferred tax assets and liabilities. Due to the Company’s U.S. valuation allowance, the Company does not expect the provisions of the CARES Act to have a material impact on its consolidated financial statements.

SEVERANCE, RESTRUCTURING, AND O

SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS	3 Months Ended
	Mar. 31, 2020
Restructuring and Related Activities [Abstract]
SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS	SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS The Company incurred severance, restructuring and other exit costs associated with 2019 and 2018 acquisitions and in connection with the termination of certain facility leases. These costs include employee severance costs, termination costs associated with facility leases and network agreements, and other exit costs related to the transactions. The Company records the current portion of severance, restructuring and other exit costs as a component of accrued expenses and other current liabilities and the long-term portion of severance, restructuring and other exit costs as a component of other long-term liabilities. The exit costs recorded and paid are summarized as follows for the three months ended March 31, 2020 (amounts in millions): Balance, December 31, 2019 Charges Payments Balance, March 31, 2020 Employee termination benefits $ 2.7 $ 0.1 $ (0.6) $ 2.2 Lease terminations 7.6 2.0 (0.8) 8.8 Other contract terminations 3.6 — (0.4) 3.2 $ 13.9 $ 2.1 $ (1.8) $ 14.2

LEASES

LEASES	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
LEASES	LEASES The Company enters into contracts to lease real estate, equipment, and vehicles, and has identified embedded leases within its colocation, dark fiber, and duct supplier contracts. The lease contracts have remaining lease terms up to 31 years and certain leases include options to extend the lease term. The Company is not party to any lease contracts with related parties. The Company’s lease agreements do not contain any residual value guarantees or restrictive covenants. The Company's lease expense is split between cost of telecommunications services and selling, general and administrative expenses in the condensed consolidated statement of operations based on the use of the asset for which lease expense is being paid. The components of lease expense for the period were as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Operating lease expense $ 23.8 $ 28.6 Finance lease expense: Amortization of right of use assets 0.5 0.6 Interest on lease liabilities 1.3 1.1 Total finance lease expense 1.8 1.7 Short-term lease expense 5.0 6.2 Variable lease expense 5.6 7.7 Total lease expense $ 36.2 $ 44.2 Supplemental cash flow information related to leases for the period was as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 21.7 $ 34.0 Operating cash flows from finance leases 1.3 1.1 Financing cash flows from finance leases 2.1 0.6 Right of use assets obtained in exchange for new operating lease liabilities 2.4 8.0 Right of use assets obtained in exchange for new finance lease liabilities 1.0 — Supplemental balance sheet information related to leases for the period was as follows: March 31, 2020 Weighted average remaining lease term (amounts in years) Operating leases 6.25 Finance leases 22.82 Weighted average discount rate Operating leases 5.6 % Finance leases 13.0 % Maturities of lease liabilities were as follows (amounts in millions): Operating Leases Finance Leases 2020 remaining $ 68.0 $ 5.1 2021 81.5 5.1 2022 63.5 5.2 2023 48.0 5.2 2024 34.3 5.3 2025 and beyond 95.3 111.2 Total lease payments 390.6 137.1 Less: Present value discount (63.3) (95.3) Present value of lease obligations $ 327.3 $ 41.8
LEASES	LEASES The Company enters into contracts to lease real estate, equipment, and vehicles, and has identified embedded leases within its colocation, dark fiber, and duct supplier contracts. The lease contracts have remaining lease terms up to 31 years and certain leases include options to extend the lease term. The Company is not party to any lease contracts with related parties. The Company’s lease agreements do not contain any residual value guarantees or restrictive covenants. The Company's lease expense is split between cost of telecommunications services and selling, general and administrative expenses in the condensed consolidated statement of operations based on the use of the asset for which lease expense is being paid. The components of lease expense for the period were as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Operating lease expense $ 23.8 $ 28.6 Finance lease expense: Amortization of right of use assets 0.5 0.6 Interest on lease liabilities 1.3 1.1 Total finance lease expense 1.8 1.7 Short-term lease expense 5.0 6.2 Variable lease expense 5.6 7.7 Total lease expense $ 36.2 $ 44.2 Supplemental cash flow information related to leases for the period was as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 21.7 $ 34.0 Operating cash flows from finance leases 1.3 1.1 Financing cash flows from finance leases 2.1 0.6 Right of use assets obtained in exchange for new operating lease liabilities 2.4 8.0 Right of use assets obtained in exchange for new finance lease liabilities 1.0 — Supplemental balance sheet information related to leases for the period was as follows: March 31, 2020 Weighted average remaining lease term (amounts in years) Operating leases 6.25 Finance leases 22.82 Weighted average discount rate Operating leases 5.6 % Finance leases 13.0 % Maturities of lease liabilities were as follows (amounts in millions): Operating Leases Finance Leases 2020 remaining $ 68.0 $ 5.1 2021 81.5 5.1 2022 63.5 5.2 2023 48.0 5.2 2024 34.3 5.3 2025 and beyond 95.3 111.2 Total lease payments 390.6 137.1 Less: Present value discount (63.3) (95.3) Present value of lease obligations $ 327.3 $ 41.8

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Estimated annual commitments under contractual obligations, excluding those related to long-term debt and operating and finance leases, are as follows at March 31, 2020 (amounts in millions): Network Supply Other 2020 remaining $ 369.1 $ 12.1 2021 367.1 6.6 2022 272.5 3.7 2023 85.0 2.8 2024 26.6 2.4 2025 and beyond 65.6 7.2 $ 1,185.9 $ 34.8 Refer to Note 7 - Debt for the aggregate contractual maturities of long-term debt (excluding unamortized debt issuance costs and unamortized original issuance discounts and premiums) at March 31, 2020 and refer to Note 13 - Leases for the aggregate contractual maturities of operating leases and finance leases at March 31, 2020. Network Supply Agreements As of March 31, 2020, the Company had purchase obligations of $1,185.9 million associated with the telecommunications services that the Company has contracted to purchase from its suppliers that are not accounted for as operating leases. The Company’s supplier agreements fall into two key categories, the Company's core IP backbone and client specific locations (also referred to as "last mile" locations). Supplier agreements associated with the Company's core IP backbone are typically contracted on a one year term and do not relate to any specific underlying client commitments. The short-term duration allows the Company to take advantage of favorable pricing trends. Supplier agreements associated with the Company's client specific locations, which represent the substantial majority of the Company's network spending, are typically contracted so the terms and conditions in both the vendor and client contracts are substantially the same in terms of duration and capacity. The back-to-back nature of the Company’s contracts means that its network supplier obligations are generally mirrored by its clients' commitments to purchase the services associated with those obligations. Legal Proceedings From time to time, the Company is a party to legal proceedings arising in the normal course of its business. Except as disclosed below, the Company does not believe that it is a party to any current or pending legal action that could reasonably be expected to have a material adverse effect on its financial condition or results of operations and cash flow. On July 30, 2019, a purported class action complaint was filed against the Company and certain of its current and former officers and directors in the U.S District Court for the Eastern District of Virginia (Case No. 1:19-cv-00982) on behalf of certain GTT stockholders. The complaint alleges that defendants made false or misleading statements and omissions of purportedly material

ORGANIZATION AND BUSINESS (Poli

ORGANIZATION AND BUSINESS (Policies)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Changes in Basis of Presentation and Accounting	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") and should be read in conjunction with the Company’s audited financial statements and footnotes thereto for the fiscal year ended December 31, 2019, included in the Company’s Annual Report on Form 10-K filed on March 2, 2020. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to such rules and regulations. The condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) that are, in the opinion of management, necessary for a fair presentation of the Company’s consolidated financial position and its results of operations. The operating results for the three months ended March 31, 2020 are not necessarily indicative of the results to be expected for the full fiscal year 2020 or for any other interim period. The December 31, 2019 consolidated balance sheet is condensed from the audited financial statements as of that date.
Use of Estimates and Assumptions	Use of Estimates and Assumptions The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts, accruals for billing disputes and exit activities, determining useful lives for depreciation and amortization, assessing the need for impairment charges (including those related to intangible assets and goodwill), determining the fair values of assets acquired and liabilities assumed in business combinations, assessing the fair value of derivative financial instruments, accounting for income taxes and related valuation allowances against deferred tax assets, and estimating the grant date fair values used to compute the share-based compensation expense. Management evaluates these estimates and judgments on an ongoing basis and makes estimates based on historical experience, current conditions, and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions, including but not limited to assumptions or conditions due to uncertainty of the magnitude and duration of the impacts of the COVID-19 pandemic in the current economic environment.
Revenue Recognition	Revenue Recognition The Company's revenue is derived primarily from telecommunications services, which includes both revenue from contracts with customers and lease revenues. Lease revenue services include dark fiber, duct, and colocation services. All other services are considered revenue from contracts with customers. Revenue from contracts with customers is recognized when services are provided to the customer, in an amount that reflects the consideration the Company expects to receive in exchange for those services. Lease revenue represents an arrangement where the customer has the right to use an identified asset for a specified term and such revenue is recognized over the term the customer is given exclusive access to the asset. Primary geographical market. The Company’s operations are located primarily in the United States and Europe. The nature and timing of revenue from contracts with customers across geographic markets is similar. The following table presents the Company's revenue from contracts with customers disaggregated by primary geographic market based on legal entities (in millions): Three Months Ended March 31, 2020 2019 Primary geographic market: United States $ 171.7 $ 204.2 Europe 205.3 196.5 Other 9.0 11.9 Total revenue from contracts with customers 386.0 412.6 Lease revenue 38.7 37.6 Total telecommunications services revenue $ 424.7 $ 450.2 Universal Service Fund ("USF"), Gross Receipts Taxes and Other Surcharges. USF fees and other surcharges billed to customers and recorded on a gross basis (as service telecommunications services revenue and cost of telecommunications services) were $5.6 million and $5.9 million for the three months ended March 31, 2020 and 2019, respectively. Contract balances. Contract assets consist of conditional or unconditional rights to consideration. Accounts receivable represent amounts billed to customers where the Company has an enforceable right to payment for performance completed to date (i.e., unconditional rights to consideration). The Company does not have contract assets that represent conditional rights to consideration. The Company’s accounts receivable balance at March 31, 2020 and December 31, 2019 includes $134.4 million and $145.9 million, respectively, related to contracts with customers. There were no other contract assets as of March 31, 2020 or December 31, 2019.
Property and Equipment	Property and Equipment Depreciation expense associated with property and equipment, including amortization of finance lease assets, was $46.4 million and $40.7 million for the three months ended March 31, 2020 and 2019, respectively. The Company capitalized labor costs, including indirect and overhead costs, of $3.8 million and $4.2 million for the three months ended March 31, 2020 and 2019, respectively. The Company capitalized software costs of $1.1 million and $1.1 million for the three months ended March 31, 2020 and 2019, respectively. The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. If the carrying amount of an asset were to exceed its estimated future undiscounted cash flows, the asset would be considered to be impaired. Impairment losses would then be measured as the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of, if any, are reported at the lower of the carrying amount or fair value less costs to sell.
Disputed Supplier Expenses	Disputed Supplier ExpensesIn the normal course of business, the Company identifies errors by suppliers with respect to the billing of services. The Company performs bill verification procedures to ensure that errors in the Company's suppliers' billed invoices are identified and resolved. If the Company concludes that a vendor has billed inaccurately, the Company will record a liability only for the amount that it believes is owed.
Newly Adopted Accounting Principles and Recent Accounting Pronouncements	Newly Adopted Accounting Principles In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , and subsequent amendment to the initial guidance, ASU 2018-19, in November 2018. The updated guidance introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019. The standard requires a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company adopted ASU 2016-13 as of January 1, 2020 using the modified retrospective approach related to its accounts receivables, resulting in a cumulative adjustment to retained earnings of approximately $9.1 million. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement , which modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019. The removed and modified disclosures are adopted on a retrospective basis and the new disclosures are adopted on a prospective basis. The Company adopted the guidance as of January 1, 2020. The adoption of the new standard did not have a material impact on the Company's condensed consolidated financial statements. Recent Accounting Pronouncements Other recent accounting pronouncements issued by the FASB during 2020 and through the filing date did not and are not believed by management to have a material impact on the Company's present or historical consolidated financial statements.

ORGANIZATION AND BUSINESS (Tabl

ORGANIZATION AND BUSINESS (Tables)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Disaggregation of Revenue	The following table presents the Company's revenue from contracts with customers disaggregated by primary geographic market based on legal entities (in millions): Three Months Ended March 31, 2020 2019 Primary geographic market: United States $ 171.7 $ 204.2 Europe 205.3 196.5 Other 9.0 11.9 Total revenue from contracts with customers 386.0 412.6 Lease revenue 38.7 37.6 Total telecommunications services revenue $ 424.7 $ 450.2
Schedule of Deferred Revenue	The following table includes estimated revenue from contracts with customers expected to be recognized for each of the years subsequent to March 31, 2020 related to performance obligations that are unsatisfied (or partially unsatisfied) at March 31, 2020 and have an original expected duration of greater than one year (amounts in millions): 2020 remaining $ 13.7 2021 15.2 2022 14.4 2023 12.8 2024 8.0 2025 and beyond 17.9 $ 82.0 Significant changes in deferred revenue balances during the period are as follows (amounts in millions): Three Months Ended March 31, 2020 Contract Term Less than 1 Year Greater than 1 Year Total Balance, December 31, 2019 $ 22.5 $ 311.0 $ 333.5 Revenue recognized from beginning balance (17.9) (10.3) (28.2) Increase in deferred revenue (gross) 49.2 10.9 60.1 Revenue recognized on increase in deferred revenue (22.0) (0.2) (22.2) Foreign currency translation adjustments (0.1) (4.1) (4.2) Balance, March 31, 2020 $ 31.7 $ 307.3 $ 339.0 Remaining amortization at March 31, 2020 and in each of the years subsequent to March 31, 2020 is as follows (amounts in millions): Contract Term Less than 1 Year Greater than 1 Year Total 2020 remaining $ 31.6 $ 32.7 $ 64.3 2021 0.1 41.3 41.4 2022 — 37.8 37.8 2023 — 36.0 36.0 2024 — 28.2 28.2 2025 and beyond — 131.3 131.3 $ 31.7 $ 307.3 $ 339.0

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The change in the carrying amount of goodwill for the three months ended March 31, 2020 was as follows (amounts in millions): Goodwill - December 31, 2019 $ 1,768.6 Adjustments to 2019 business combinations (0.6) Foreign currency translation adjustments (4.3) Goodwill - March 31, 2020 $ 1,763.7
Schedule of Finite-Lived Intangible Assets	The following table summarizes the Company’s intangible assets as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Amortization Gross Asset Cost Accumulated Amortization Net Book Value Gross Asset Cost Accumulated Amortization Net Book Value Customer lists 3-20 years $ 775.2 $ 331.7 $ 443.5 $ 781.1 $ 313.7 $ 467.4 Non-compete agreements 3-5 years 4.7 4.7 — 4.7 4.6 0.1 Intellectual property 10 years 38.0 16.3 21.7 38.3 15.4 22.9 Tradename 1-3 years 6.1 5.9 0.2 6.2 5.9 0.3 $ 824.0 $ 358.6 $ 465.4 $ 830.3 $ 339.6 $ 490.7
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Estimated amortization expense related to intangible assets subject to amortization at March 31, 2020 in each of the years subsequent to March 31, 2020 is as follows (amounts in millions): 2020 remaining $ 63.3 2021 82.6 2022 69.5 2023 57.0 2024 51.5 2025 and beyond 141.5 Total $ 465.4

PREPAID EXPENSES AND OTHER CU_2

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)	3 Months Ended
	Mar. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	The following table summarizes the Company’s prepaid expenses and other current assets as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Receivables from suppliers $ 36.0 $ 10.7 Prepaid cost of telecommunications services 19.4 11.8 Prepaid selling, general and administrative 12.6 13.1 Deferred commissions 11.3 9.8 Other 2.8 5.0 $ 82.1 $ 50.4

ACCRUED EXPENSES AND OTHER CU_2

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)	3 Months Ended
	Mar. 31, 2020
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	The following table summarizes the Company’s accrued expenses and other current liabilities as of March 31, 2020 and December 31, 2019 (amounts in millions): March 31, 2020 December 31, 2019 Cost of telecommunications services $ 91.7 $ 105.3 Interest rate swaps 86.7 53.5 Compensation and benefits 25.6 24.4 Taxes payable 26.2 28.3 Selling, general and administrative 19.4 18.1 Interest 11.8 0.4 Restructuring, current portion 6.7 6.4 Other 5.3 4.4 $ 273.4 $ 240.8

DEFERRED REVENUE (Tables)

DEFERRED REVENUE (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Schedule of Deferred Revenue	The following table includes estimated revenue from contracts with customers expected to be recognized for each of the years subsequent to March 31, 2020 related to performance obligations that are unsatisfied (or partially unsatisfied) at March 31, 2020 and have an original expected duration of greater than one year (amounts in millions): 2020 remaining $ 13.7 2021 15.2 2022 14.4 2023 12.8 2024 8.0 2025 and beyond 17.9 $ 82.0 Significant changes in deferred revenue balances during the period are as follows (amounts in millions): Three Months Ended March 31, 2020 Contract Term Less than 1 Year Greater than 1 Year Total Balance, December 31, 2019 $ 22.5 $ 311.0 $ 333.5 Revenue recognized from beginning balance (17.9) (10.3) (28.2) Increase in deferred revenue (gross) 49.2 10.9 60.1 Revenue recognized on increase in deferred revenue (22.0) (0.2) (22.2) Foreign currency translation adjustments (0.1) (4.1) (4.2) Balance, March 31, 2020 $ 31.7 $ 307.3 $ 339.0 Remaining amortization at March 31, 2020 and in each of the years subsequent to March 31, 2020 is as follows (amounts in millions): Contract Term Less than 1 Year Greater than 1 Year Total 2020 remaining $ 31.6 $ 32.7 $ 64.3 2021 0.1 41.3 41.4 2022 — 37.8 37.8 2023 — 36.0 36.0 2024 — 28.2 28.2 2025 and beyond — 131.3 131.3 $ 31.7 $ 307.3 $ 339.0

DEBT (Tables)

DEBT (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Schedule of Debt	As of March 31, 2020 and December 31, 2019, long-term debt was as follows (amounts in millions): March 31, 2020 December 31, 2019 US Term loan due 2025 $ 1,739.0 $ 1,743.5 EMEA Term loan due 2025 951.5 828.8 7.875% Senior unsecured notes due 2024 575.0 575.0 Revolving line of credit due 2023 65.0 140.0 Other secured loans 2.1 4.3 Total debt obligations 3,332.6 3,291.6 Unamortized debt issuance costs (26.6) (28.0) Unamortized original issuance discount, net (48.0) (40.8) Carrying value of debt 3,258.0 3,222.8 Less current portion (29.6) (30.2) Long-term debt less current portion $ 3,228.4 $ 3,192.6 The unused and available amount of the Revolving Line of Credit Facility at March 31, 2020 was as follows (amounts in millions): Committed capacity $ 250.0 Borrowings outstanding (65.0) Letters of credit issued (10.9) Unused and available $ 174.1 The following table summarizes the debt issuance costs activity for the three months ended March 31, 2020 (amounts in millions): US Term Loan EMEA Term Loan 7.875% Senior Unsecured Notes Revolving Line of Credit Total Balance, December 31, 2019 $ (9.9) $ (2.7) $ (12.3) $ (3.1) $ (28.0) Debt issuance costs incurred — (2.3) — — (2.3) Amortization 0.4 0.3 0.5 0.2 1.4 Loss on debt extinguishment — 2.3 — — 2.3 Balance, March 31, 2020 $ (9.5) $ (2.4) $ (11.8) $ (2.9) $ (26.6) The following table summarizes the original issuance (discount) and premium activity for the three months ended March 31, 2020 (amounts in millions): US Term Loan EMEA Term Loan 7.875% Senior Unsecured Notes Total Balance, December 31, 2019 $ (34.2) $ (18.7) $ 12.1 $ (40.8) New Original Issuance Discount — (5.6) — (5.6) Fees paid to lenders — (3.4) — (3.4) Amortization 1.4 0.9 (0.5) 1.8 Balance, March 31, 2020 $ (32.8) $ (26.8) $ 11.6 $ (48.0)
Debt Instrument, Maximum Ratio Specified	If triggered, the covenant, as amended, requires the Company to maintain a Consolidated Net Secured Leverage Ratio, on a Pro Forma Basis, below the maximum ratio specified as follows: Fiscal Quarter Ending Maximum Ratio March 31, 2020 6.50:1 June 30, 2020 6.50:1 September 30, 2020 6.25:1 December 31, 2020 6.25:1 March 31, 2021 5.50:1 June 30, 2021 5.00:1 September 30, 2021 5.00:1 December 31, 2021 4.50:1 March 31, 2022 4.50:1 June 30, 2022 and thereafter 4.25:1
Schedule of Derivative Instruments	In April and May 2018, the Company entered into the following interest rate swap arrangements to partially mitigate the variability of cash flows due to changes in the Eurodollar rate, specifically related to interest payments on our term loans under the 2018 Credit Agreement: Trade date April 6, 2018 May 17, 2018 May 17, 2018 May 17, 2018 Notional amount (in millions) $ 500.0 $ 200.0 $ 300.0 € 317.0 Term (years) 5 7 3 7 Effective date 4/30/2018 6/29/2018 6/29/2018 6/29/2018 Termination date 4/30/2023 5/31/2025 6/30/2021 5/31/2025 Fixed rate 2.6430 % 3.0370 % 2.8235 % 0.8900 % Floating rate 1-month LIBOR 1-month LIBOR 1-month LIBOR 1-month EURIBOR
Schedule of Interest Rate Derivatives	The fair value of the interest rate swaps at March 31, 2020 and December 31, 2019 was as follows (in millions): Fair Value March 31, 2020 December 31, 2019 Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Interest rate swap $ 500.0 4/30/2018 4/30/2023 $ — $ (36.1) $ — $ (18.2) Interest rate swap $ 200.0 6/29/2018 5/31/2025 — (27.1) — (15.3) Interest rate swap $ 300.0 6/29/2018 6/30/2021 — (9.5) — (5.8) Interest rate swap € 317.0 6/29/2018 5/31/2025 — (14.0) — (14.2) $ — $ (86.7) $ — $ (53.5)
Schedule of Maturities of Long-term Debt	The aggregate contractual maturities of long-term debt (excluding unamortized debt issuance costs and unamortized original issuance discounts and premiums) were as follows as of March 31, 2020 (amounts in millions): Total Debt 2020 remaining $ 22.9 2021 27.3 2022 27.5 2023 92.5 2024 602.4 2025 and beyond 2,560.0 $ 3,332.6

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Interest Rate Derivatives	March 31, 2020 Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Total Level 1 Level 2 Level 3 Assets: Interest rate swap agreements $ — $ — $ — $ — Liabilities: Interest rate swap agreements $ (86.7) $ — $ (86.7) $ — December 31, 2019 Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Total Level 1 Level 2 Level 3 Assets: Interest rate swap agreements $ — $ — $ — $ — Liabilities: Interest rate swap agreements $ (53.5) $ — $ (53.5) $ —
Schedule of Fair Values of Long-term Debt	The table below presents the fair values for the Company's long-term debt as well as the input level used to determine these fair values as of March 31, 2020 and December 31, 2019. The carrying amounts exclude any debt issuance costs or original issuance discount (amounts in millions): Fair Value Measurement Using Total Carrying Value in Consolidated Balance Sheet Unadjusted Quoted Prices in Active Markets for Identical Assets or Liabilities (1) (Level 1) March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Liabilities not recorded at fair value in the Financial Statements: Long-term debt, including the current portion: US Term loan due 2025 $ 1,739.0 $ 1,743.5 $ 1,208.6 $ 1,464.5 EMEA Term loan due 2025 951.5 828.8 777.9 787.9 7.875% Senior unsecured notes due 2024 575.0 575.0 370.9 435.6 Revolving line of credit due 2023 65.0 140.0 65.0 140.0 Other secured loans 2.1 4.3 2.1 4.3 Total long-term debt, including current portion $ 3,332.6 $ 3,291.6 $ 2,424.5 $ 2,832.3 (1) Fair value based on the bid quoted price, except for the revolving line of credit and other secured loans for which carrying value approximates fair value.

SHARE-BASED COMPENSATION (Table

SHARE-BASED COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The following tables summarize the share-based compensation expense recognized as a component of selling, general and administrative expenses in the condensed consolidated statements of operations (amounts in millions): Three Months Ended March 31, 2020 2019 Stock options $ — $ 0.2 Restricted stock 8.2 8.3 ESPP 0.1 0.2 Total $ 8.3 $ 8.7
Schedule of Unrecognized Compensation Cost, Nonvested Awards	The following table summarizes the unrecognized compensation cost and the weighted average period over which the cost is expected to be amortized (amounts in millions): March 31, 2020 Unrecognized Compensation Cost Weighted Average Remaining Period to be Recognized (Years) Time-based stock options $ — 0.25 Time-based restricted stock 48.1 2.64 Performance-based restricted stock (1) 2.0 0.25 Total $ 50.1 2.54 (1) Excludes $8.1 million, $25.1 million, and
Schedule of Share-based Compensation, Activity	The following table summarizes the restricted stock granted during the three months ended March 31, 2020 and 2019 (amounts in millions, except shares data): Three Months Ended March 31, 2020 2019 Time-based restricted stock granted 1,183,525 598,141 Fair value of time-based restricted stock granted $ 14.6 $ 19.3 Performance-based restricted stock granted 651,350 24,000 Fair value of performance-based restricted stock granted $ 8.1 $ 0.8

LOSS PER SHARE (Tables)

LOSS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The table below details the calculations of loss per share (in millions, except for share and per share amounts): Three Months Ended March 31, 2020 2019 Numerator for basic and diluted EPS – net loss available to common stockholders $ (83.3) $ (27.3) Denominator for basic EPS – weighted average shares 57,259,699 55,839,212 Effect of dilutive securities — — Denominator for diluted EPS – weighted average shares 57,259,699 55,839,212 Loss per share: Basic $ (1.45) $ (0.49) Diluted $ (1.45) $ (0.49)

SEVERANCE, RESTRUCTURING, AND_2

SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS (Tables)	3 Months Ended
	Mar. 31, 2020
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs	The exit costs recorded and paid are summarized as follows for the three months ended March 31, 2020 (amounts in millions): Balance, December 31, 2019 Charges Payments Balance, March 31, 2020 Employee termination benefits $ 2.7 $ 0.1 $ (0.6) $ 2.2 Lease terminations 7.6 2.0 (0.8) 8.8 Other contract terminations 3.6 — (0.4) 3.2 $ 13.9 $ 2.1 $ (1.8) $ 14.2

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Lease, Cost	The components of lease expense for the period were as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Operating lease expense $ 23.8 $ 28.6 Finance lease expense: Amortization of right of use assets 0.5 0.6 Interest on lease liabilities 1.3 1.1 Total finance lease expense 1.8 1.7 Short-term lease expense 5.0 6.2 Variable lease expense 5.6 7.7 Total lease expense $ 36.2 $ 44.2 Supplemental cash flow information related to leases for the period was as follows (amounts in millions): Three Months Ended March 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 21.7 $ 34.0 Operating cash flows from finance leases 1.3 1.1 Financing cash flows from finance leases 2.1 0.6 Right of use assets obtained in exchange for new operating lease liabilities 2.4 8.0 Right of use assets obtained in exchange for new finance lease liabilities 1.0 — Supplemental balance sheet information related to leases for the period was as follows: March 31, 2020 Weighted average remaining lease term (amounts in years) Operating leases 6.25 Finance leases 22.82 Weighted average discount rate Operating leases 5.6 % Finance leases 13.0 %
Finance Lease, Liability, Maturity	Maturities of lease liabilities were as follows (amounts in millions): Operating Leases Finance Leases 2020 remaining $ 68.0 $ 5.1 2021 81.5 5.1 2022 63.5 5.2 2023 48.0 5.2 2024 34.3 5.3 2025 and beyond 95.3 111.2 Total lease payments 390.6 137.1 Less: Present value discount (63.3) (95.3) Present value of lease obligations $ 327.3 $ 41.8
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities were as follows (amounts in millions): Operating Leases Finance Leases 2020 remaining $ 68.0 $ 5.1 2021 81.5 5.1 2022 63.5 5.2 2023 48.0 5.2 2024 34.3 5.3 2025 and beyond 95.3 111.2 Total lease payments 390.6 137.1 Less: Present value discount (63.3) (95.3) Present value of lease obligations $ 327.3 $ 41.8

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Estimated Annual Commitments Under Contractual Obligations	Estimated annual commitments under contractual obligations, excluding those related to long-term debt and operating and finance leases, are as follows at March 31, 2020 (amounts in millions): Network Supply Other 2020 remaining $ 369.1 $ 12.1 2021 367.1 6.6 2022 272.5 3.7 2023 85.0 2.8 2024 26.6 2.4 2025 and beyond 65.6 7.2 $ 1,185.9 $ 34.8

ORGANIZATION AND BUSINESS - Nar

ORGANIZATION AND BUSINESS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)continentcountrypoint_of_presence	Mar. 31, 2019USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of points of presence (more than) | point_of_presence	600
Number of continents | continent	6
Number of countries (more than) | country	140
Excise and sales taxes collected	$ 5,600	$ 5,900
Contract with customer, liability	82,000			$ 76,000
Contract with customer, liability, revenue recognized	3,800
Contract with customer, liability, additions	10,700
Deferred commissions	24,700			23,000
Depreciation and amortization	46,400	40,700
Capitalized labor costs	3,800	4,200
Capitalized software costs	1,100	$ 1,100
Disputed supplier expense	28,800			12,200
Receivables from suppliers	36,000			10,700
Cumulative effect of new accounting principle in period of adoption			$ (9,100)
Accounts Receivable
Finite-Lived Intangible Assets [Line Items]
Contract with customer, asset, current	$ 134,400			$ 145,900
Accumulated Deficit
Finite-Lived Intangible Assets [Line Items]
Cumulative effect of new accounting principle in period of adoption			(9,100)
Accounting Standards Update 2016-13 [Member] | Accumulated Deficit
Finite-Lived Intangible Assets [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ (9,100)

ORGANIZATION AND BUSINESS - Sch

ORGANIZATION AND BUSINESS - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 386	$ 412.6
Lease revenue	38.7	37.6
Total telecommunications services revenue	424.7	450.2
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	171.7	204.2
Europe
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	205.3	196.5
Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 9	$ 11.9

ORGANIZATION AND BUSINESS - S_2

ORGANIZATION AND BUSINESS - Schedule of Revenue Expected to be Recognized (Details) $ in Millions	Mar. 31, 2020USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 82
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 13.7
Performance obligation period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 15.2
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 14.4
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 12.8
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 8
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations	$ 17.9
Performance obligation period

BUSINESS ACQUISITIONS - Narrati

BUSINESS ACQUISITIONS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Combinations [Abstract]
Integration related costs	$ 2.2	$ 9.2

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 1,763,700,000		$ 1,768,600,000
Intangible asset balance	465,400,000		$ 490,700,000
Goodwill impairment	0	$ 0
Amortization of intangible assets	21,100,000	22,100,000
Intangible asset impairment	$ 0	$ 0

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS - Schedule of Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Goodwill [Roll Forward]
Goodwill beginning of period	$ 1,768.6
Adjustments to 2019 business combinations	(0.6)
Foreign currency translation adjustments	(4.3)
Goodwill end of period	$ 1,763.7

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill And Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Schedule of Intangible Assets [Line Items]
Gross Asset Cost	$ 824	$ 830.3
Accumulated Amortization	358.6	339.6
Total	465.4	490.7
Customer lists
Schedule of Intangible Assets [Line Items]
Gross Asset Cost	775.2	781.1
Accumulated Amortization	331.7	313.7
Total	$ 443.5	467.4
Customer lists | Minimum
Schedule of Intangible Assets [Line Items]
Amortization Period	3 years
Customer lists | Maximum
Schedule of Intangible Assets [Line Items]
Amortization Period	20 years
Non-compete agreements
Schedule of Intangible Assets [Line Items]
Gross Asset Cost	$ 4.7	4.7
Accumulated Amortization	4.7	4.6
Total	$ 0	0.1
Non-compete agreements | Minimum
Schedule of Intangible Assets [Line Items]
Amortization Period	3 years
Non-compete agreements | Maximum
Schedule of Intangible Assets [Line Items]
Amortization Period	5 years
Intellectual property
Schedule of Intangible Assets [Line Items]
Amortization Period	10 years
Gross Asset Cost	$ 38	38.3
Accumulated Amortization	16.3	15.4
Total	21.7	22.9
Tradename
Schedule of Intangible Assets [Line Items]
Gross Asset Cost	6.1	6.2
Accumulated Amortization	5.9	5.9
Total	$ 0.2	$ 0.3
Tradename | Minimum
Schedule of Intangible Assets [Line Items]
Amortization Period	1 year
Tradename | Maximum
Schedule of Intangible Assets [Line Items]
Amortization Period	3 years

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS - Schedule of Amortization Expense (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2020 remaining	$ 63.3
2021	82.6
2022	69.5
2023	57
2024	51.5
2025 and beyond	141.5
Total	$ 465.4	$ 490.7

PREPAID EXPENSES AND OTHER CU_3

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Receivables from suppliers	$ 36	$ 10.7
Prepaid cost of telecommunications services	19.4	11.8
Prepaid selling, general and administrative	12.6	13.1
Deferred commissions	11.3	9.8
Other	2.8	5
Prepaid expenses and other current assets	$ 82.1	$ 50.4

ACCRUED EXPENSES AND OTHER CU_3

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Cost of telecommunications services	$ 91.7	$ 105.3
Interest rate swaps	86.7	53.5
Compensation and benefits	25.6	24.4
Taxes payable	26.2	28.3
Selling, general and administrative	19.4	18.1
Interest	11.8	0.4
Restructuring, current portion	6.7	6.4
Other	5.3	4.4
Accrued expenses and other current liabilities	$ 273.4	$ 240.8

DEFERRED REVENUE - Narrative (D

DEFERRED REVENUE - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 82	$ 76
Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 339	$ 333.5

DEFERRED REVENUE - Schedule of

DEFERRED REVENUE - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 67
Revenue recognized from beginning balance	(3.8)
Increase in deferred revenue (gross)	9.7	$ 2.6
Ending balance	83.8
Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Contract With Customer, Liability [Roll Forward]
Beginning balance	333.5
Revenue recognized from beginning balance	(28.2)
Increase in deferred revenue (gross)	60.1
Revenue recognized on increase in deferred revenue	(22.2)
Foreign currency translation adjustments	(4.2)
Ending balance	339
Less than 1 Year | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Contract With Customer, Liability [Roll Forward]
Beginning balance	22.5
Revenue recognized from beginning balance	(17.9)
Increase in deferred revenue (gross)	49.2
Revenue recognized on increase in deferred revenue	(22)
Foreign currency translation adjustments	(0.1)
Ending balance	31.7
Greater than 1 Year | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Contract With Customer, Liability [Roll Forward]
Beginning balance	311
Revenue recognized from beginning balance	(10.3)
Increase in deferred revenue (gross)	10.9
Revenue recognized on increase in deferred revenue	(0.2)
Foreign currency translation adjustments	(4.1)
Ending balance	$ 307.3

DEFERRED REVENUE - Schedule o_2

DEFERRED REVENUE - Schedule of Performance Obligations (Details) $ in Millions	Mar. 31, 2020USD ($)
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 82
Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	339
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 64.3
Performance obligation period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 13.7
Performance obligation period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 15.2
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 41.4
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 14.4
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 37.8
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 12.8
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 36
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 8
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 28.2
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 17.9
Performance obligation period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 131.3
Performance obligation period
Less than 1 Year | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 31.7
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	31.6
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	0.1
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	0
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	0
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	0
Less than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	0
Greater than 1 Year | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	307.3
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	32.7
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	41.3
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	37.8
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	36
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	28.2
Greater than 1 Year | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Prepaid Services, IRUs, And Deferred Non-Recurring Revenue
Deferred Revenue Arrangement [Line Items]
Performance obligations	$ 131.3

DEBT - Schedule of Long-term De

DEBT - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt obligations	$ 3,332.6	$ 3,291.6
Unamortized debt issuance costs	(26.6)	(28)
Unamortized original issuance discount, net	(48)	(40.8)
Carrying value of debt	3,258	3,222.8
Less current portion	(29.6)	(30.2)
Long-term debt less current portion	3,228.4	3,192.6
US Term Loan
Debt Instrument [Line Items]
Unamortized debt issuance costs	(9.5)	(9.9)
Unamortized original issuance discount, net	(32.8)	(34.2)
EMEA Term loan due 2025
Debt Instrument [Line Items]
Unamortized debt issuance costs	(2.4)	(2.7)
Unamortized original issuance discount, net	(26.8)	(18.7)
7.875% Senior unsecured notes due 2024
Debt Instrument [Line Items]
Unamortized debt issuance costs	(11.8)	(12.3)
Unamortized original issuance discount, net	11.6	12.1
Term loan | US Term Loan
Debt Instrument [Line Items]
Total debt obligations	1,739	1,743.5
Term loan | EMEA Term loan due 2025
Debt Instrument [Line Items]
Total debt obligations	$ 951.5	828.8
Senior Notes | 7.875% Senior unsecured notes due 2024
Debt Instrument [Line Items]
Stated percentage rate	7.875%
Total debt obligations	$ 575	575
Other secured loans
Debt Instrument [Line Items]
Total debt obligations	2.1	4.3
Revolving line of credit due 2023
Debt Instrument [Line Items]
Total debt obligations	65
Revolving line of credit due 2023 | Line of Credit
Debt Instrument [Line Items]
Total debt obligations	$ 65	$ 140

DEBT - Narrative (Details)

DEBT - Narrative (Details)	Feb. 28, 2020USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2020EUR (€)	Mar. 31, 2019USD ($)	Mar. 31, 2017offering	Feb. 28, 2020EUR (€)	Dec. 31, 2019USD ($)	Jun. 05, 2019USD ($)	May 31, 2018USD ($)	May 31, 2018EUR (€)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 300,000,000
Other income (expense)		43,300,000		$ 16,000,000
Other secured loans		3,332,600,000					$ 3,291,600,000
Amortization of debt issuance costs		1,400,000		1,200,000
Debt discount amortization		1,800,000		1,900,000
Senior Notes
Debt Instrument [Line Items]
Other income (expense)		33,500,000		$ 15,300,000
Other secured loans
Debt Instrument [Line Items]
Other secured loans		2,100,000					$ 4,300,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 250,000,000						$ 250,000,000	$ 200,000,000
Consolidated net secured leverage ratio (more than)		4.40
Other secured loans		$ 65,000,000
Debt instrument, interest rate, effective percentage		5.20%					5.20%
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									50,000,000
US Term Loan B Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									1,770,000,000
Original issuance discount									$ 8,900,000
Quarterly installments		$ 4,425,000
US Term Loan B Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.75%	1.75%
US Term Loan B Facility | Eurocurrency Loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.75%	2.75%
US Term Loan B Facility | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.00%	0.00%
EMEA Term Loan B Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity | €										€ 750,000,000
Original issuance discount | €										€ 3,800,000
Quarterly installments | €			€ 1,875,000
Debt instrument, basis spread on variable rate		3.25%	3.25%
EMEA Term Loan B Facility | Euribor
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.00%	0.00%
EMEA Term Loan B Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		3.25%	3.25%
EMEA Term Loan B Facility | Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.75%	1.75%
EMEA Term Loan B Facility | Revolving Credit Facility | Eurodollar
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.75%	2.75%
Incremental Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity								$ 50,000,000
Credit Agreement 2018
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 140,000,000
Long-term line of credit	140,000,000					€ 750,000,000
Credit Agreement 2018 | Revolving Credit Facility
Debt Instrument [Line Items]
Consolidated net secured leverage ratio (more than)		0.30
Commitment fee percentage		26.00%	26.00%
Consolidated net secured leverage ratio on a pro forma basis		6.53	6.53
Maximum specified ratio		650.00%	650.00%
Debt covenant, minimum liquidity		$ 250,000,000
7.875% Senior unsecured notes due 2024
Debt Instrument [Line Items]
Number of private offerings | offering					3
Aggregate principal amount											$ 575,000,000
Amortization of debt issuance costs		500,000
Debt discount amortization		$ (500,000)
7.875% Senior unsecured notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Stated percentage rate		7.875%
Debt premium											$ 16,500,000
Other secured loans		$ 575,000,000					$ 575,000,000
EMEA Term Loan Facility 2020
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	50,000,000
Original issuance discount	5,600,000
Quarterly installments	$ 350,000
Prepayment or reinvestment period	30 days
EMEA Term Loan Facility 2020 | On or prior to the one year anniversary
Debt Instrument [Line Items]
Debt instrument, deferred callable bonds, percent	2.00%
Term loan facility anniversary	1 year
EMEA Term Loan Facility 2020 | Following the one year anniversary
Debt Instrument [Line Items]
Debt instrument, deferred callable bonds, percent	1.00%
Term loan facility anniversary	1 year
EMEA Term Loan Facility 2020 | Base Rate | First two years following the effective date of the 2020 EMEA Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.25%
EMEA Term Loan Facility 2020 | Base Rate | Following the second anniversary of the effective 2020 EMEA Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.75%
EMEA Term Loan Facility 2020 | Eurocurrency Loans | First two years following the effective date of the 2020 EMEA Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.25%
EMEA Term Loan Facility 2020 | Eurocurrency Loans | Following the second anniversary of the effective 2020 EMEA Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.75%

DEBT - Schedule of Revolving Cr

DEBT - Schedule of Revolving Credit Facility (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Jun. 05, 2019	May 31, 2018
Debt Instrument [Line Items]
Committed capacity	$ 300,000,000
Borrowings outstanding	(3,332,600,000)	$ (3,291,600,000)
Revolving Credit Facility
Debt Instrument [Line Items]
Committed capacity	250,000,000		$ 250,000,000	$ 200,000,000
Borrowings outstanding	(65,000,000)
Letters of credit issued	(10,900,000)
Unused and available	$ 174,100,000

DEBT - Maximum Specified Ratio

DEBT - Maximum Specified Ratio (Details) - Revolving Credit Facility - Credit Agreement 2018	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Maximum specified ratio										650.00%
Scenario, Forecast
Debt Instrument [Line Items]
Maximum specified ratio	425.00%	450.00%	450.00%	500.00%	500.00%	550.00%	625.00%	625.00%	650.00%

DEBT - Schedule of Interest Rat

DEBT - Schedule of Interest Rate Swaps (Details)	3 Months Ended
	Mar. 31, 2020USD ($)	Mar. 31, 2020EUR (€)	Dec. 31, 2019USD ($)
Derivative [Line Items]
Asset Derivatives	$ 0		$ 0
Liability Derivatives	(86,700,000)		(53,500,000)
Interest rate swap, maturing 4/30/2023
Derivative [Line Items]
Aggregate Notional Amount	$ 500,000,000
Term	5 years
Asset Derivatives	$ 0		0
Liability Derivatives	(36,100,000)		(18,200,000)
Interest rate swap, maturing 5/31/2025
Derivative [Line Items]
Aggregate Notional Amount	$ 200,000,000
Term	7 years
Asset Derivatives	$ 0		0
Liability Derivatives	(27,100,000)		(15,300,000)
Interest rate swap, maturing 6/30/2021
Derivative [Line Items]
Aggregate Notional Amount	$ 300,000,000
Term	3 years
Asset Derivatives	$ 0		0
Liability Derivatives	$ (9,500,000)		(5,800,000)
Interest rate swap, maturing 5/31/2025
Derivative [Line Items]
Aggregate Notional Amount | €		€ 317,000,000
Term	7 years
Asset Derivatives	$ 0		0
Liability Derivatives	$ (14,000,000)		$ (14,200,000)
LIBOR | Interest rate swap, maturing 4/30/2023
Derivative [Line Items]
Fixed rate	2.643%	2.643%
LIBOR | Interest rate swap, maturing 5/31/2025
Derivative [Line Items]
Fixed rate	3.037%	3.037%
LIBOR | Interest rate swap, maturing 6/30/2021
Derivative [Line Items]
Fixed rate	2.8235%	2.8235%
Euribor | Interest rate swap, maturing 5/31/2025
Derivative [Line Items]
Fixed rate	0.89%	0.89%

DEBT - Schedule of Maturities o

DEBT - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2020 remaining	$ 22.9
2021	27.3
2022	27.5
2023	92.5
2024	602.4
2025 and beyond	2,560
Total Debt	$ 3,332.6	$ 3,291.6

DEBT - Schedule of Debt Issuanc

DEBT - Schedule of Debt Issuance Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Issuance Costs [Roll Forward]
Beginning balance	$ (28)
Debt issuance costs incurred	(2.3)
Amortization	1.4	$ 1.2
Loss on debt extinguishment	2.3
Ending balance	(26.6)
US Term Loan
Debt Issuance Costs [Roll Forward]
Beginning balance	(9.9)
Debt issuance costs incurred	0
Amortization	0.4
Loss on debt extinguishment	0
Ending balance	(9.5)
EMEA Term Loan
Debt Issuance Costs [Roll Forward]
Beginning balance	(2.7)
Debt issuance costs incurred	(2.3)
Amortization	0.3
Loss on debt extinguishment	2.3
Ending balance	(2.4)
7.875% Senior Unsecured Notes
Debt Issuance Costs [Roll Forward]
Beginning balance	(12.3)
Debt issuance costs incurred	0
Amortization	0.5
Loss on debt extinguishment	0
Ending balance	(11.8)
Revolving Line of Credit
Debt Issuance Costs [Roll Forward]
Beginning balance	(3.1)
Debt issuance costs incurred	0
Amortization	0.2
Loss on debt extinguishment	0
Ending balance	$ (2.9)

DEBT - Schedule of Debt Discoun

DEBT - Schedule of Debt Discount And Premium (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	$ (40.8)
New Original Issuance Discount	(5.6)
Fees paid to lenders	(3.4)
Amortization	1.8	$ 1.9
Ending balance	(48)
US Term Loan
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	(34.2)
New Original Issuance Discount	0
Fees paid to lenders	0
Amortization	1.4
Ending balance	(32.8)
EMEA Term loan due 2025
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	(18.7)
New Original Issuance Discount	(5.6)
Fees paid to lenders	(3.4)
Amortization	0.9
Ending balance	(26.8)
7.875% Senior Unsecured Notes
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	12.1
New Original Issuance Discount	0
Fees paid to lenders	0
Amortization	(0.5)
Ending balance	$ 11.6

FAIR VALUE MEASUREMENTS (Detail

FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivatives	$ 0	$ 0
Liability Derivatives	(86.7)	(53.5)
Interest rate swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivatives	0	0
Liability Derivatives	(86.7)	(53.5)
Interest rate swap agreements | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivatives	0	0
Liability Derivatives	0	0
Interest rate swap agreements | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivatives	0	0
Liability Derivatives	(86.7)	(53.5)
Interest rate swap agreements | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivatives	0	0
Liability Derivatives	$ 0	$ 0

FAIR VALUES MEASUREMENTS - Fair

FAIR VALUES MEASUREMENTS - Fair Value of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	$ 3,332.6	$ 3,291.6
Carrying Value | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	65	140
Carrying Value | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	575	575
Carrying Value | Other secured loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2.1	4.3
Fair Value | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2,424.5	2,832.3
Fair Value | Quoted Prices in Active Markets Level 1 | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	65	140
Fair Value | Senior Notes | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	370.9	435.6
Fair Value | Other secured loans | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2.1	4.3
US Term Loan | Carrying Value | Term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	1,739	1,743.5
US Term Loan | Fair Value | Term loan | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	1,208.6	1,464.5
EMEA Term loan due 2025 | Carrying Value | Term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	951.5	828.8
EMEA Term loan due 2025 | Fair Value | Term loan | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	$ 777.9	$ 787.9

SHARE-BASED COMPENSATION - Narr

SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	14,250,000
Awards outstanding and issued (in shares)	12,622,117
Unrecognized compensation cost	$ 50,100,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	85.00%
Number of shares available for grant (in shares)	241,902
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	1 year
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted	$ 14,600,000	$ 19,300,000
Unrecognized compensation cost	48,100,000
Restricted stock | 2017 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted	32,600,000
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted	8,100,000	800,000
Allocated share-based compensation expense		1,100,000
Unrecognized compensation cost	2,000,000
Performance-based restricted stock | 2015 Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted			$ 17,400,000
Performance-based restricted stock | 2017 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	12,100,000
Allocated share-based compensation expense	1,000,000	$ 1,800,000
Nonvested options forfeited	5,400,000
Unrecognized compensation cost	13,800,000
Performance-based restricted stock | 2018 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	25,100,000
Fair value of shares granted	31,200,000
Allocated share-based compensation expense	0
Nonvested options forfeited	6,100,000
Performance-based restricted stock | 2020 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	8,100,000
Fair value of shares granted	$ 8,100,000
Stock Option 25
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	4 years
Stock Option 25 | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	4 years
Stock Option 25 | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	1 year
Stock Option 75
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	3 years
Percent of awards vesting after initial year	75.00%
Stock Option 75 | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	3 years
Periodic Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent (at least)	100.00%
Periodic Vesting | Employee Director Consultant Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award (no later than)	10 years
Periodic Vesting | Stock Option 25
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual vesting percentage	25.00%
Periodic Vesting | Stock Option 25 | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual vesting percentage	25.00%
Minimum | Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	1 year
Maximum | Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested and expected to vest, outstanding, weighted average remaining contractual term	2 years

SHARE-BASED COMPENSATION - Sche

SHARE-BASED COMPENSATION - Schedule of Share-based Compensation Expense (Details) - Selling, general and administrative expenses - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 8.3	$ 8.7
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	0	0.2
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	8.2	8.3
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 0.1	$ 0.2

SHARE-BASED COMPENSATION - Sc_2

SHARE-BASED COMPENSATION - Schedule of Unrecognized Compensation Expense (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 50.1
Weighted Average Remaining Period to be Recognized (Years)	2 years 6 months 14 days
Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, Time-based stock options	$ 0
Weighted Average Remaining Period to be Recognized (Years)	3 months
Time-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, Time-based and Performance-based restricted stock	$ 48.1
Weighted Average Remaining Period to be Recognized (Years)	2 years 7 months 20 days
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, Time-based and Performance-based restricted stock	$ 2
Weighted Average Remaining Period to be Recognized (Years)	3 months
2020 Performance Shares | Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 8.1
2018 Performance Shares | Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	25.1
2017 Performance Shares | Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, Time-based and Performance-based restricted stock	13.8
Unrecognized Compensation Cost	$ 12.1

SHARE-BASED COMPENSATION - Sc_3

SHARE-BASED COMPENSATION - Schedule of Stock Options (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Time-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time-based stock granted (in shares)	1,183,525	598,141
Fair value of stock granted	$ 14.6	$ 19.3
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time-based stock granted (in shares)	651,350	24,000
Fair value of stock granted	$ 8.1	$ 0.8

LOSS PER SHARE (Details)

LOSS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Numerator for basic and diluted EPS – net loss available to common stockholders	$ (83.3)	$ (27.3)
Denominator for basic EPS - weighted average shares (in shares)	57,259,699	55,839,212
Effect of dilutive securities	0	0
Denominator for diluted EPS – weighted average shares (in shares)	57,259,699	55,839,212
Loss per share:
Basic (in dollars per share)	$ (1.45)	$ (0.49)
Diluted (in dollars per share)	$ (1.45)	$ (0.49)
Antidilutive securities (in shares)	376,960	474,880

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Provision for income taxes	$ (1.9)	$ 1.8
Period of cumulative loss incurred			3 years
Domestic Tax Authority
Income Tax Contingency [Line Items]
Valuation allowance	100.7		$ 100.7
Foreign Tax Authority
Income Tax Contingency [Line Items]
Valuation allowance	$ 111.3		$ 110.6

SEVERANCE, RESTRUCTURING, AND_3

SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS - Schedule of Exit Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning balance	$ 13.9
Charges	2.1	$ 2.8
Payments	(1.8)	$ (8.4)
Ending balance	14.2
Employee termination benefits
Restructuring Reserve [Roll Forward]
Beginning balance	2.7
Charges	0.1
Payments	(0.6)
Ending balance	2.2
Lease terminations
Restructuring Reserve [Roll Forward]
Beginning balance	7.6
Charges	2
Payments	(0.8)
Ending balance	8.8
Other contract terminations
Restructuring Reserve [Roll Forward]
Beginning balance	3.6
Charges	0
Payments	(0.4)
Ending balance	$ 3.2

SEVERANCE, RESTRUCTURING, AND_4

SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Charges	$ 2.1	$ 2.8
Payments for restructuring	$ 1.8	$ 8.4

LEASES - Narrative (Details)

LEASES - Narrative (Details)	3 Months Ended
	Mar. 31, 2020
Maximum
Operating Leased Assets [Line Items]
Term of contract (up to)	31 years

LEASES - Lease Cost (Details)

LEASES - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease expense	$ 23.8	$ 28.6
Finance lease expense:
Amortization of right of use assets	0.5	0.6
Interest on lease liabilities	1.3	1.1
Total finance lease expense	1.8	1.7
Short-term lease expense	5	6.2
Variable lease expense	5.6	7.7
Total lease expense	36.2	44.2
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	21.7	34
Operating cash flows from finance leases	1.3	1.1
Financing cash flows from finance leases	2.1	0.6
Right of use assets obtained in exchange for new operating lease liabilities	2.4	8
Right of use assets obtained in exchange for new finance lease liabilities	$ 1	$ 0
Weighted average remaining lease term (amounts in years)
Operating leases	6 years 3 months
Finance leases	22 years 9 months 25 days
Weighted average discount rate
Operating leases	5.60%
Finance leases	13.00%

LEASES - Operating and Finance

LEASES - Operating and Finance Lease Maturity (Details) $ in Millions	Mar. 31, 2020USD ($)
Operating Leases
2020 remaining	$ 68
2021	81.5
2022	63.5
2023	48
2024	34.3
2025 and beyond	95.3
Total lease payments	390.6
Less: Present value discount	(63.3)
Present value of lease obligations	327.3
Finance Leases
2020 remaining	5.1
2021	5.1
2022	5.2
2023	5.2
2024	5.3
2025 and beyond	111.2
Total lease payments	137.1
Less: Present value discount	(95.3)
Present value of lease obligations	$ 41.8

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)category
Network Supply
Contractual Obligation, Fiscal Year Maturity
2020 remaining	$ 369.1
2021	367.1
2022	272.5
2023	85
2024	26.6
2025 and beyond	65.6
Contractual obligation	$ 1,185.9
Contractual obligation, number of key categories | category	2
Contract term	1 year
Other
Contractual Obligation, Fiscal Year Maturity
2020 remaining	$ 12.1
2021	6.6
2022	3.7
2023	2.8
2024	2.4
2025 and beyond	7.2
Contractual obligation	$ 34.8