Local Fiber S-4 13 Oct 15 Registration of securities issued in business combination transactions Financial data

Document And Entity Information

Document And Entity Information	12 Months Ended
	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	S4
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Entity Registrant Name	ZAYO GROUP LLC
Entity Central Index Key	1,502,756
Entity Filer Category	Non-accelerated Filer

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Current assets
Cash and cash equivalents	$ 308	$ 297.4
Trade receivables, net of allowance of $3.4 and $3.7 as of June 30, 2015 and June 30, 2014, respectively	88	57.2
Due from related parties	0.6	0.9
Prepaid expenses	37.3	24.9
Deferred income taxes, net	129.5	161
Other assets	3.9	2.4
Total current assets	567.3	543.8
Property and equipment, net	3,299.2	2,822.4
Intangible assets, net	948.3	710.3
Goodwill	1,224.4	866.7
Other assets	54.8	37.7
Total assets	6,094	4,980.9
Current liabilities
Current portion of long-term debt	16.5	20.5
Accounts payable	40	26.7
Accrued liabilities	182.4	172.3
Accrued interest	57.2	57.1
Capital lease obligations, current	4.4	2.4
Due to related parties	1.3
Deferred revenue, current	86.6	75.4
Total current liabilities	388.4	354.4
Long-term debt, non-current	3,652.2	3,130.3
Capital lease obligation, non-current	28.3	25.7
Deferred revenue, non-current	612.7	501.5
Stock-based compensation liability	1.9	392.4
Deferred income taxes, net	189.7	153
Other long-term liabilities	26.7	22.3
Total liabilities	$ 4,899.9	$ 4,579.6
Commitments and contingencies (Note 14)
Member's Equity
Member's interest	$ 1,699.1	$ 728.9
Accumulated other comprehensive (loss)/income	(7.9)	14.4
Accumulated deficit	(497.1)	(342)
Total member's equity	1,194.1	401.3
Total liabilities and member's equity	$ 6,094	$ 4,980.9

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Statement Of Financial Position [Abstract]
Trade receivables allowance	$ 3.4	$ 3.7

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	Jul. 02, 2012	Jun. 30, 2015	[1]	Mar. 31, 2015	[1],[2],[3]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[4],[5]	Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015	[1]	Jun. 30, 2014	[4]	Jun. 30, 2013
Income Statement [Abstract]
Revenue		$ 361.9		$ 340.7		$ 323.9		$ 320.6		$ 298.1		$ 283.2		$ 278.7		$ 269.7		$ 644.5	$ 985.2	$ 1,347.1		$ 1,129.7		$ 1,011
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)		107.5		100.9		97.8		107.3		92.8		84.9		85.9		79.7				413.5		343.3		314.1
Selling, general and administrative expenses (including stock-based compensation—Note 12)		86.4	[9]	83	[9]	32.1	[9]	156.6	[9]	124.6		96.6		87		76.4				358.1	[9]	384.6		256.7
Depreciation and amortization		113.2		100.1		96.9		96		91.3		84.2		81.7		81				406.2		338.2		324.5
Total operating costs and expenses		307.1		284		226.8		359.9		308.7		265.7		254.6		237.1				1,177.8		1,066.1		895.3
Operating income		54.8		56.7		97.1		(39.3)		(10.6)		17.5		24.1		32.6				169.3		63.6		115.7
Other expenses
Interest expense		(53)		(60.7)		(53.4)		(46.9)		(52.6)	[10]	(49.1)	[10]	(50.3)	[10]	(51.5)	[10]			(214)		(203.5)	[10]	(202.5)
Loss on extinguishment of debt	$ (65)	(8.5)	[11]	(54.9)	[11]	(30.9)	[11]							(1.9)	[12]					(94.3)	[11]	(1.9)	[12]	(77.3)
Foreign currency (loss)/gain on intercompany loans		16.8		(13.2)		(13.3)		(14.7)		3.8		0.1		0.2		0.6				(24.4)		4.7		0.1
Other (expenses)/income, net		(0.3)				(0.1)				(0.1)				0.3		0.1				(0.4)		0.3		0.3
Total other expenses, net		(45)		(128.8)		(97.7)		(61.6)		(48.9)		(49)		(51.7)		(50.8)				(333.1)		(200.4)		(279.4)
Loss before income taxes		9.8		(72.1)		(0.6)		(100.9)		(59.5)		(31.5)		(27.6)		(18.2)				(163.8)		(136.8)		(163.7)
(Benefit)/provision for income taxes		4.6		(18.4)		(4.3)		9.4		10.5		12.1		8.4		9.3				(8.7)		40.3		(21.8)
Net Loss		$ 5.2		$ (53.7)		$ 3.7		$ (110.3)		$ (70)		$ (43.6)		$ (36)		$ (27.5)				$ (155.1)		$ (177.1)		$ (141.9)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.
[9]	The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation.
[10]	The Company realized an increase in interest expense during the second and fourth quarters of 2014 due to financing transactions completed to increase its borrowings under its term loan facility. See Note 8— Long-Term Debt.
[11]	The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.
[12]	The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Comprehensive Income Net Of Tax [Abstract]
Net loss	$ (155.1)	[1]	$ (177.1)	[2]	$ (141.9)
Foreign currency translation adjustments	(22.3)		19.2		(4.8)
Comprehensive loss	$ (177.4)		$ (157.9)		$ (146.7)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

CONSOLIDATED STATEMENTS OF MEMB

CONSOLIDATED STATEMENTS OF MEMBER'S INTEREST - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2015		Sep. 30, 2014		Jun. 30, 2014		Sep. 30, 2013		Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Balance			$ 401.3				$ 558.8		$ 401.3		$ 558.8		$ 365.9
Capital (distributed)/contributed (non-cash)									385		5.6		344
Capital contributed (cash)									385		5.6		344
Non-cash distributions to parent, net											(6)		(5.3)
Reclassification of common unit liability to additional paid in capital									490.2
Distributions to parent											(1.2)
Preferred stock-based compensation									95		0.4		0.9
Foreign currency translation adjustment									(22.3)		19.2		(4.8)
CII Preferred Units issued for Corelink Data Centers, LLC purchase											1.6
Net loss	$ 5.2	[1]	(110.3)	[1]	$ (70)	[2],[3]	(27.5)	[2]	(155.1)	[1]	(177.1)	[2]	(141.9)
Balance	1,194.1				401.3				1,194.1		401.3		558.8
Members Interest [Member]
Balance			728.9				728.5		728.9		728.5		388.9
Capital contributed (cash)									385		5.6		344
Non-cash distributions to parent, net											(6)		(5.3)
Reclassification of common unit liability to additional paid in capital									490.2
Distributions to parent											(1.2)
Preferred stock-based compensation									95		0.4		0.9
CII Preferred Units issued for Corelink Data Centers, LLC purchase											1.6
Balance	1,699.1				728.9				1,699.1		728.9		728.5
Accumulated Other Comprehensive Income/(Loss) [Member]
Balance			14.4				(4.8)		14.4		(4.8)
Foreign currency translation adjustment									(22.3)		19.2		(4.8)
Balance	(7.9)				14.4				(7.9)		14.4		(4.8)
Accumulated Deficit [Member]
Balance			$ (342)				$ (164.9)		(342)		(164.9)		(23)
Net loss									(155.1)		(177.1)		(141.9)
Balance	$ (497.1)				$ (342)				$ (497.1)		$ (342)		$ (164.9)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[3]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2015USD ($)		Jun. 30, 2014USD ($)		Jun. 30, 2013USD ($)
Cash flows from operating activities
Net loss	$ (155.1)	[1]	$ (177.1)	[2]	$ (141.9)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	406.2	[1]	338.2	[2]	324.5
Loss on extinguishment of debt	94.3	[1],[3]	1.9	[2],[4]	77.3
Non-cash interest expense	19.7		22.1		12.3
Stock-based compensation	200.7		253.7		105.8
Amortization of deferred revenue	(72.1)		(55.6)		(43.1)
Additions to deferred revenue	149.1		163.8		61.7
Provision for bad debts	1.9		1.9		2.1
Foreign currency loss/(gain) on intercompany loans	24.4	[1]	(4.7)	[2]	(0.1)
Non-cash loss on investments	0.9
Lease termination charge					10.2
Deferred income taxes	(13.2)		26.9		(23.5)
Changes in operating assets and liabilities, net of acquisitions
Trade receivables	(11.2)		20.5		(4.4)
Prepaid expenses	(2.9)		(1.4)		1.9
Payables to/(from) related parties, net	1.6		(6.1)		10.5
Accounts payable and accrued liabilities	(22.9)		(6.6)		15.3
Other assets, current and non-current	(7.5)		(1.7)		(11.1)
Other liabilities	(6.9)		(13.8)		7.2
Net cash provided by operating activities	607		562		404.7
Cash flows from investing activities
Purchases of property and equipment	(530.4)		(360.8)		(332.6)
Broadband stimulus grants received					9.3
Acquisition of net cash acquired	(855.7)		(393.3)		(2,480.7)
Other			(0.3)		2.7
Net cash used in investing activities	(1,386.1)		(754.1)		(2,804)
Cash flows from financing activities
Proceeds from debt	1,787.3		423.6		3,189.3
Proceeds from revolving credit facility			195
Proceeds from equity contributions	385		5.6		344
Distribution to parent			(1.2)
Principal payments on long-term debt	(1,288.5)		(18)		(1,058.6)
Payment of early redemption fees on debt extinguished	(62.6)				(72.1)
Principal payments on capital lease obligations	(3.5)		(7.9)		(1.9)
Payments on revolving credit facility			(195)
Payment of debt issuance costs	(24.2)		(4.9)		(83.1)
Change in restricted cash, net					22.6
Net cash provided by financing activities	793.5		397.2		2,340.2
Cash flows from continuing operations	14.4		205.1		(59.1)
Effect of changes in foreign exchange rates on cash	(3.8)		1		(0.3)
Net increase/(decrease) in cash and cash equivalents	10.6		206.1		(59.4)
Cash and cash equivalents, beginning of year	297.4		91.3		150.7
Net increase/(decrease) in cash and cash equivalents	10.6		206.1		(59.4)
Cash and cash equivalents, end of period	308		297.4		91.3
Supplemental disclosure of non-cash investing and financing activities:
Cash paid for interest, net of capitalized interest	191.2		175.3		143.5
Cash paid for income taxes	14.5		5.7		2.8
Non-cash purchases of equipment through capital leasing	6.8		10.5		11.4
Increase in accounts payable and accrued expenses for purchases of property and equipment	8.4		10.9		15
Latisys Holdings, LLC [Member]
Cash flows from investing activities
Acquisition of net cash acquired	(677.5)
Ideatek Systems, Inc., [Member]
Cash flows from investing activities
Acquisition of net cash acquired	(52.7)
Neo Telecoms [Member]
Cash flows from investing activities
Acquisition of net cash acquired	(73.9)
Colo Facilities Atlanta [Member]
Cash flows from investing activities
Acquisition of net cash acquired	(51.9)
Geo Networks Limited [Member]
Cash flows from investing activities
Acquisition of net cash acquired			(292.3)
CoreXchange [Member]
Cash flows from investing activities
Acquisition of net cash acquired	$ 0.3		(17.5)
Fiberlink, LLC [Member]
Cash flows from investing activities
Acquisition of net cash acquired			(43.1)
Access Communications, Inc [Member]
Cash flows from investing activities
Acquisition of net cash acquired			$ (40.1)
Core NAP, LP [Member]
Cash flows from investing activities
Acquisition of net cash acquired					(7.1)
Litecast/Balticore, LLC [Member]
Cash flows from investing activities
Acquisition of net cash acquired					(22.2)
First Telecom Services, LLC [Member]
Cash flows from investing activities
Acquisition of net cash acquired					(109.7)
USCarrier Telecom, LLC [Member]
Cash flows from investing activities
Acquisition of net cash acquired					(16.1)
FiberGate [Member]
Cash flows from investing activities
Acquisition of net cash acquired					(118.3)
Abovenet, Inc [Member]
Cash flows from investing activities
Acquisition of net cash acquired					$ (2,210)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[3]	The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.
[4]	The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

Organization and Description of

Organization and Description of Business	12 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Organization and Description of Business	(1) ORGANIZATION AND DESCRIPTION OF BUSINESS Zayo Group, LLC, a Delaware limited liability company, was formed on May 4, 2007, and is the operating parent company of a number of subsidiaries engaged in bandwidth infrastructure provision and services. Zayo Group, LLC and its subsidiaries are collectively referred to as “Zayo Group” or the “Company.” Headquartered in Boulder, Colorado, the Company operates bandwidth infrastructure assets, including fiber networks and datacenters, in the United States and Europe to offer: • Physical infrastructure, including dark fiber, mobile infrastructure and colocation services. • Lit services, including wavelengths, Ethernet, IP, and SONET services. • Other services, provided by Zayo Professional Services and Zayo France. Zayo Group is wholly owned by Zayo Group Holdings, Inc. (“Holdings” or “ZGH”). On October 22, 2014, Holdings completed an initial public offering (“IPO”) of shares of its common stock, which were listed on the New York Stock Exchange (“NYSE”) under the ticker symbol “ZAYO”. Prior to Holding’s IPO, ZGH was wholly owned by Communications Infrastructure Investments, LLC ("CII"). The Company’s fiscal year ends June 30 each year. The fiscal year ended June 30, 2014 is referred to as “Fiscal 2014” and the fiscal year ending June 30, 2015 as “Fiscal 2015.”

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Jun. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	(2) BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES a. Basis of Presentation The accompanying consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) Our fiscal year ends June 30 each year, and we refer to the fiscal year ended June 30, 2015 as “Fiscal 2015,” June 30, 2014 as “Fiscal 2014,” and the fiscal year ended June 30, 2013 as “Fiscal 2013.” b. Foreign Currency Translation For operations outside the U.S. that have functional currencies other than the U.S. dollar, assets and liabilities are translated to U.S. dollars at period-end exchange rates, and revenue, expenses and cash flows are translated using monthly average exchange rates during the year. Gains or losses resulting from currency translation are recorded as a component of accumulated other comprehensive loss in member’s equity and in the consolidated statements of comprehensive loss. The Company considers the majority of its investments in its foreign subsidiaries to be permanently reinvested. c. Use of Estimates The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts and accruals for billing disputes, determining useful lives for depreciation and amortization and accruals for exit activities associated with real estate leases, 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, accounting for income taxes and related valuation allowances against deferred tax assets and estimating the common unit and restricted stock unit grant fair values used to compute the stock-based compensation liability and 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 d. Cash and Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with original maturities of three months or less to be cash and cash equivalents. Cash equivalents are stated at cost, which approximates fair value. Restricted cash consists of cash balances held by various financial institutions as collateral for letters of credit and surety bonds. These balances are reclassified to cash and cash equivalents when the underlying obligation is satisfied, or in accordance with the governing agreement. Restricted cash balances expected to become unrestricted during the next twelve months are recorded as current assets. As of June 30, 2015 and 2014, the Company had a non-current restricted cash balance of $4.8 million and $5.1 million respectively. e. Trade Receivables Trade receivables are recorded at the invoiced amount and do not bear interest. The Company maintains an allowance for doubtful accounts for estimated losses inherent in its trade receivable portfolio. In establishing the required allowance, management considers historical losses adjusted to take into account current market conditions and the customer’s financial condition, and the age of receivables and current payment patterns. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. f. Property and Equipment The Company’s property and equipment includes assets in service and under construction or development. Property and equipment is recorded at historical cost or acquisition date fair value. Costs associated directly with network construction, service installations, and development of business support systems, including employee-related costs, are capitalized. Depreciation is calculated on a straight-line basis over the asset’s estimated useful life from the date placed into service or acquired. Management periodically evaluates the estimates of the useful life of property and equipment by reviewing historical usage, with consideration given to technological changes, trends in the industry, and other economic factors that could impact the network architecture and asset utilization. Equipment acquired under capital leases is recorded at the lower of the fair value of the asset or the net present value of the minimum lease payments at the inception of the lease. Depreciation of equipment held under capital leases is included in depreciation and amortization expense, and is calculated on a straight-line basis over the estimated useful lives of the assets, or the related lease term, whichever is shorter. Management reviews property and equipment for impairment whenever events or changes in circumstances indicate that the carrying value of its property and equipment may not be recoverable. An impairment loss is recognized when the assets’ carrying value exceeds both the assets’ estimated undiscounted future cash flows and the assets’ estimated fair value. Measurement of the impairment loss is then based on the estimated fair value of the assets. Considerable judgment is required to project such future cash flows and, if required, to estimate the fair value of the property and equipment and the resulting amount of the impairment. No impairment charges were recorded for property and equipment during the years ended June 30, 2015, 2014 or 2013. The Company capitalizes interest for assets that require a period of time to get them ready for their intended use. The amount of interest capitalized is based on the Company’s weighted average effective interest rate for outstanding debt obligations during the respective accounting period. g. Goodwill and Acquired Intangibles Intangible assets arising from business combinations, such as acquired customer contracts and relationships, (collectively “customer relationships”), are initially recorded at fair value. The Company amortizes customer relationships primarily over an estimated life of 10 to 20 years, using the straight-line method as this method approximates the timing in which the Company expects to receive the benefit from the acquired customer relationship assets. Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in a business combination. Goodwill is reviewed for impairment at least annually in April, or more frequently if a triggering event occurs between impairment testing dates. The Company’s impairment assessment begins with a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. The qualitative assessment includes comparing the overall financial performance of the reporting units against the planned results used in the last quantitative goodwill impairment test. Additionally, each reporting unit’s fair value is assessed in light of certain events and circumstances, including macroeconomic conditions, industry and market considerations, cost factors, and other relevant entity- and reporting unit-specific events. The selection and assessment of qualitative factors used to determine whether it is more likely than not that the fair value of a reporting unit exceeds the carrying value involves significant judgments and estimates. If it is determined under the qualitative assessment that it is more likely than not that the fair value of a reporting unit is less than its carrying value, then a two-step quantitative impairment test is performed. Under the first step, the estimated fair value of the reporting unit is compared with its carrying value (including goodwill). If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed. If the estimated fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the enterprise must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation in acquisition accounting. The residual amount after this allocation is the implied fair value of the reporting unit goodwill. Fair value of the reporting unit under the two-step assessment is determined using a combination of both income and market-based variation approaches. The inputs and assumptions to valuation methods used to estimate the fair value of reporting units involves significant judgments. The Company reviews its indefinite-lived intangible assets for impairment at least annually in April and involves comparing the estimated fair value of indefinite-lived intangible assets to their respective carrying values. To the extent the carrying value of indefinite-lived intangible assets exceeds the fair value, the Company will recognize an impairment loss for the difference. The Company performed a qualitative assessment to determine whether it was more likely than not that the fair value of these assets was in excess of the carrying value for the year ended June 30, 2015, 2014 or 2013 and has concluded there is no indication of impairment. Intangible assets with finite useful lives are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. No impairment charges were recorded for goodwill or intangibles during the years ended June 30, 2015, 2014 or 2013. h. Derivative Financial Instruments Derivative instruments are recorded in the balance sheet as either assets or liabilities, measured at fair value. The Company has historically entered into interest rate swaps to convert a portion of its floating-rate debt to fixed-rate debt and has not applied hedge accounting; therefore, the changes in the fair value of the interest rate swaps are recognized in earnings as adjustments to interest expense. The principal objectives of the derivative instruments are to minimize the cash flow interest rate risks associated with financing activities. The Company does not use financial instruments for trading purposes. The Company utilizes interest rate swap contracts in connection with debt instruments entered into during the July 2012 financing transactions. i. Revenue Recognition The Company recognizes revenues derived from leasing fiber optic telecommunications infrastructure and the provision of telecommunications and colocation services when the service has been provided and when there is persuasive evidence of an arrangement, the fee is fixed or determinable, customer acceptance has been obtained with relevant contract terms, and collection of the receivable is reasonably assured. Taxes collected from customers and remitted to a governmental authority are reported on a net basis and are excluded from revenue. Most revenue is billed in advance on a fixed-rate basis and the remainder is billed in arrears on a transactional basis determined by customer usage. The Company often bills customers for upfront charges, which are non-refundable. These charges relate to activation fees, installation charges or prepayments for future services and are influenced by various business factors including how the Company and customer agree to structure the payment terms. These upfront charges are deferred and recognized over the underlying contractual term. The Company also defers costs associated with customer activation and installation to the extent of upfront amounts received from customers, which are recognized as expense over the same period for which the associated revenue is recognized. The Company typically records revenues from leases of dark fiber, including indefeasible rights-of-use (“IRU”) agreements, over the term that the customer is given exclusive access to the assets. Dark fiber IRU agreements generally require the customer to make a down payment upon the execution of the agreement with monthly IRU fees paid over the contract term; however, in some cases, the Company receives up to the entire lease payment at the inception of the lease and recognizes the revenue ratably over the lease term. Revenue related to professional services to provide network management and technical support is recognized as services are provided. In determining the appropriate amount of revenue and related reserves to reflect in its consolidated financial statements, management evaluates payment history, credit ratings, customer financial performance, and historical or potential billing disputes and related estimates are based on these factors and assumptions. j. Operating Costs and Expenses The Company’s operating costs and expenses consist primarily of network expense (“Netex”), compensation and benefits, network operations expense (“Netops”), stock-based compensation, other expenses, and depreciation and amortization. Netex consists of third-party network service costs resulting from the leasing of certain network facilities, primarily leases of circuits and dark fiber, from carriers to augment the Company’s owned infrastructure, for which it is generally billed a fixed monthly fee. Netex also includes colocation facility costs for rent and license fees paid to the landlords of the buildings in which the Company’s colocation business operates, along with the utility costs to power those facilities. Compensation and benefits expenses include salaries, wages, incentive compensation and benefits. Employee-related costs that are directly associated with network construction, service installations and development of business support systems are capitalized and amortized to operating costs and expenses over the customer life. Compensation and benefits expenses related to the departments attributed to generating revenue are included in “Operating costs” while compensation and benefits expenses related to the sales, product, and corporate departments are included in “Selling, general and administrative expenses” in the consolidated statements of operations. Netops expense include all of the non-personnel related expenses of operating and maintaining the network infrastructure, including contracted maintenance fees, right-of-way costs, rent for cellular towers and other places where fiber is located, pole attachment fees, and relocation expenses. Netops expense is included in “Operating costs” in the consolidated statements of operations. Stock-based compensation expense consists of the fair value of equity based awards granted to employees and independent directors over their applicable vesting period. Stock-based compensation expense is included, based on the responsibilities of the awarded recipient, in either “Operating costs” or “Selling, general and administrative expenses” in the consolidated statements of operations. For additional information regarding our stock-based compensation expense, see Note 12 – Stock-Based Compensation Other expenses include expenses such as property tax, franchise fees, and colocation facility maintenance, which relate to operating our network and are therefore included in “Operating costs” as well as travel, office expense and other administrative costs that are included in “Selling, general and administrative expenses”. Other expenses are included in either “Operating costs” or “Selling, general and administrative expenses” in the consolidated statement of operations depending on their relationship to generating revenue or association with sales and administration. Transaction costs include expenses associated with professional services (i.e. legal, accounting, regulatory, etc.) rendered in connection with acquisitions or disposals (including spin-offs), travel expense, severance expense incurred on the date of acquisition or disposal, and other direct expenses incurred that are associated with signed and/or closed acquisitions or disposals. Transaction costs are included in “Selling, general and administrative expenses” in the consolidated statements of operations. Related to Netex, the Company recognizes the cost of these facilities or services when it is incurred in accordance with contractual requirements. The Company routinely disputes incorrect billings. The most prevalent types of disputes include disputes for circuits that are not disconnected on a timely basis and usage bills with incorrect records. Depending on the type and complexity of the issues involved, it may take several quarters to resolve disputes. In determining the amount of such operating expenses and related accrued liabilities to reflect in its consolidated financial statements, management considers the adequacy of documentation of disconnect notices, compliance with prevailing contractual requirements for submitting such disconnect notices and disputes to the provider of the facilities, and compliance with its interconnection agreements with these carriers. Significant judgment is required in estimating the ultimate outcome of the dispute resolution process, as well as any other costs that may be incurred to conclude the negotiations or settle any litigation. k. Stock-Based Compensation In October 2014, the Company adopted a new incentive plan. The plan includes incentive cash compensation (ICC) and equity (in the form of restricted stock units). Grants under the new incentive plan are made quarterly for all participants. The Company recognizes all stock-based awards to employees and independent directors, based on their grant-date fair values and the Company’s estimates of forfeitures. The Company recognizes the fair value of outstanding awards as a charge to operations over the vesting period. The Company uses the straight-line method to recognize share-based compensation expense for outstanding share awards that do not contain a performance condition. Prior to the Company’s IPO, the Company was given authorization by CII to award 625,000,000 of CII’s common units as profits interests to employees, directors, and affiliates of the Company. The common units were historically considered to be stock-based compensation with terms that required the awards to be classified as liabilities due to cash settlement features. The vested portion of the awards was reported as a liability and the fair value was re-measured at each reporting date until the date of settlement, with a corresponding charge (or credit) to stock-based compensation expense. In connection with the Company’s IPO and the related amendment to the CII operating agreement, there was a deemed modification to the stock compensation arrangements with the Company’s employees and directors. As a result, previously issued common units which were historically accounted for as liability awards, became classified as equity awards. Determining the fair value of certain share-based awards at the grant date and subsequent reporting dates requires judgment. If actual results differ significantly from these estimates, stock-based compensation expense and the Company’s results of operations could be materially impacted. For additional information regarding our stock-based compensation, see Note 12 – Stock-Based Compensation l. Legal Costs Costs incurred to hire and retain external legal counsel to advise us on regulatory, litigation and other matters is expensed as the related services are received. m. Income Taxes The Company recognizes income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in earnings in the period that includes the enactment date. Estimating the future tax benefit associated with deferred tax assets requires significant judgment. Deferred tax assets arise from a variety of sources, the most significant being: tax losses that can be carried forward to be utilized against taxable income in future years; and expenses recognized in the Company’s financial statements but disallowed in the Company’s tax return until the associated cash flow occurs. The Company records a valuation allowance to reduce its deferred tax assets to the amount that is expected to be recognized. The valuation allowance is established if, based on available evidence, it is more-likely-than-not that all or some portion of the asset will not be realized due to the inability to generate sufficient taxable income in the period and/or of the character necessary to utilize the benefit of the deferred tax asset. When evaluating whether it is more-likely-than-not that all or some portion of the deferred tax asset will not be realized, all available evidence, both positive and negative, that may affect the realizability of deferred tax assets is identified and considered in determining the appropriate amount of the valuation allowance. The Company continues to monitor its financial performance and other evidence each quarter to determine the appropriateness of the Company’s valuation allowance. At each balance sheet date, existing assessments are reviewed and, if necessary, revised to reflect changed circumstances. The analysis of the Company’s ability to utilize its NOL balance is based on the Company’s forecasted taxable income. The forecasted assumptions approximate the Company’s best estimates, including market growth rates, future pricing, market acceptance of the Company’s products and services and future expected capital investments. If the Company is unable to meet its taxable income forecasts in future periods the Company may change its conclusion about the appropriateness of the valuation allowance which could create a substantial income tax expense in the Company’s consolidated statement of operations in the period such change occurs. Deferred tax liabilities related to investments in foreign subsidiaries and foreign corporate joint ventures that are essentially permanent in duration are not recognized until it becomes apparent that such amounts will reverse in the foreseeable future. The Company records interest related to unrecognized tax benefits and penalties in the provision for income taxes. n. Fair Value of Financial Instruments Relevant accounting literature defines and establishes a framework for measuring fair value, and requires expanded disclosures about fair value measurements. It also emphasizes that fair value is a market-based measurement, not an entity-specific measurement, and defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques that may be used include the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost), which are each based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. Fair Value Hierarchy A fair value hierarchy is established that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that are used to measure fair value are: Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access. Level 2 Inputs to the valuation methodology include: • quoted prices for similar assets or liabilities in active markets; • quoted prices for identical or similar assets or liabilities in inactive markets; • inputs other than quoted prices that are observable for the asset or liability; and • inputs that are derived principally from or corroborated by observable market data by correlation or other means. If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability. Level 3 Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The Company views fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, management considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. o. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash investments and accounts receivable. The Company’s cash and cash equivalents are primarily held in commercial bank accounts in the United States and Great Britain. The Company limits its cash investments to high-quality financial institutions in order to minimize its credit risk. During the years ended June 30, 2015, 2014 and 2013 the Company had no single customer that exceeded 10% of total revenue. The Company’s trade receivables, which are unsecured, are geographically dispersed. As of June 30, 2015 and 2014, the Company had one customer with a trade receivable balance of 10% and 12%, respectively, of total receivables. p. Reclassification of Network Related Expenses and Zayo Professional Services The Company has historically included certain network related expenses associated with the operations, support and maintenance of its network assets and technical facilities, including compensation and related benefits and stock-based compensation expense associated with personnel involved in these activities, within the line item “Selling, general and administrative expenses” in its consolidated statement of operations. The Company has changed its presentation of these network related expenses to be included in operating costs in its consolidated statements of operations to differentiate costs attributed to generating revenue from selling, general and administrative expenses. This reclassification does not impact the Company’s previously reported total operating costs and expenses, operating income subtotal or net loss total for the periods presented. The following tables reflect the reclassification of network related expenses from “Selling, general and administrative expenses” to “Operating costs” for each of the quarters and annual period for Fiscal 2014. The following table reflects the reclassification of network related expenses from “Selling, general and administrative expenses” to “Operating costs” and the impact of the transfer of ZPS into the Company for each of the quarters and annual periods in Fiscal 2014. Fiscal 2014 Quarter Ended Year Ended September 30 December 31 March 31 June 30 June 30, 2014 Operating costs, as originally stated $ 34.9 $ 35.0 $ 35.4 $ 36.2 $ 141.5 Reclassification of network-related expenses 42.8 49.0 47.7 53.3 192.8 Transfer of Zayo Professional Services 2.0 1.9 1.8 3.3 9.0 Operating costs, as adjusted $ 79.7 $ 85.9 $ 84.9 $ 92.8 $ 343.3 Selling, general and administrative expenses, as originally stated $ 117.4 $ 134.2 $ 142.7 $ 176.9 $ 571.2 Reclassification of network-related expenses (42.8 ) (48.9 ) (47.8 ) (53.3 ) (192.8 ) Transfer of Zayo Professional Services 1.8 1.7 1.7 1.0 6.2 Selling, general and administrative expenses, as adjusted $ 76.4 $ 87.0 $ 96.6 $ 124.6 $ 384.6 See also Note 4 - Transfer of Zayo Professional Services. The interim and annual financial information for Fiscal 2014 have been adjusted accordingly in the Company’s condensed consolidated balance sheet and statements of operations. The effect of the transfer of ZPS into the Company on net income/(loss), other comprehensive income/(loss), and any related per-share amounts was immaterial for all prior periods presented herein q. Recently Issued Accounting Pronouncements Debt Issuance Costs In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs related to a recognized debt liability to be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Prior to the issuance of ASU 2015-03, debt issuance costs were required to be presented as deferred charge assets, separate from the related debt liability. ASU 2015-03 does not change the recognition and measurement requirements for debt issuance costs. The Company early-adopted ASU 2015-03 as of the end of Fiscal 2015, and applied its provisions retrospectively. The adoption of ASU 2015-03 resulted in the reclassification of $71.0 million and $89.4 million of unamortized debt issuance costs (see Note 8 – Long Term Debt Long-term debt, non-current Revenue Recognition In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisitions	(3) ACQUISITIONS Since inception, the Company has consummated 34 transactions accounted for as business combinations. The acquisitions were executed as part of the Company’s business strategy of expanding through acquisitions. The acquisitions of these businesses 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 reach, and broaden its customer base. The accompanying consolidated financial statements include the operations of the acquired entities from their respective acquisition dates. Acquisitions Completed During Fiscal 2015 Neo Telecoms (“Neo”) On July 1, 2014, the Company acquired a 96% equity interest in Neo, a Paris-based bandwidth infrastructure company. The purchase agreement also includes a call option to acquire the remaining equity interest on or after December 31, 2015. The purchase consideration of €54.1 million (or $73.9 million), net of cash acquired, was in consideration of acquiring 96% equity ownership in Neo and a call option to purchase the remaining 4% equity interest in Neo. The fair value of the 4% non-controlling interest in Neo as of the acquisition date was $2.9 million and recorded in Other long-term liabilities. The consideration consisted of cash and was paid with cash on hand from the proceeds of the Sixth Amendment to the Company’s term loan facility. €8.7 million (or $11.9 million) of the purchase consideration is currently held in escrow pending the expiration of the indemnification adjustment period. The acquisition was considered a stock purchase for tax purposes. Colo Facilities Atlanta (“AtlantaNAP”) On July 1, 2014, the Company acquired 100% of the equity interest in AtlantaNAP, a datacenter and managed services provider in Atlanta, for cash consideration of $51.9 million. $5.3 million of the purchase price is currently held in escrow pending the expiration of the indemnification adjustment period. The acquisition was considered an asset purchase for tax purposes. IdeaTek Systems, Inc. (“IdeaTek”) Effective January 1, 2015, the Company acquired all of the equity interest in IdeaTek. The purchase price, subject to certain post-closing adjustments, was $52.7 million and was paid with cash on hand, $3.2 million of the purchase consideration is currently held in escrow pending the expiration of the indemnification adjustment period. The acquisition was considered a stock purchase for tax purposes. The IdeaTek acquisition added 1,800 route miles to the Company’s network in Kansas, and includes a dense metro footprint in Wichita, Kansas. The network spans across Kansas and connects to approximately 600 cellular towers and over 100 additional buildings. Latisys Holdings, LLC (“Latisys”) On February 23, 2015, the Company acquired the operating units of Latisys, a colocation and infrastructure as a service (“Iaas”) provider for a price of $677.5 million, net of cash acquired. The Latisys acquisition was funded with the proceeds of the January Notes Offering (as defined in Note 8 – Long-Term Debt The Latisys acquisition added colocation and IaaS services through eight datacenters across five markets in Northern Virginia, Chicago, Denver, Orange County and London. The acquired datacenters currently total over 185,000 square feet of billable space and 33 megawatts of critical power. Acquisitions During the Year Ended June 30, 2014 Corelink Data Centers, LLC ("Corelink") On August 1, 2013, the Company entered into an asset purchase agreement to acquire Corelink. The transaction was consummated on the same date, at which time the Company acquired substantially all of the net assets of this business for consideration of approximately $1.9 million comprised of 301,949 preferred units of CII with an estimated fair value of $1.6 million and cash of $0.3 million, net of cash acquired. The acquisition was considered a stock purchase for tax purposes. The cash consideration was paid with cash on hand. Access Communications, Inc. ("Access") On October 1, 2013, the Company acquired 100% of the equity interest in Access, a Minnesota corporation, for cash consideration of $40.1 million net of cash acquired, of which $4.0 million is currently held in escrow pending the expiration of the indemnification adjustment period. The acquisition was considered a stock purchase for tax purposes. The purchase price was paid with cash on hand. FiberLink, LLC ("FiberLink") On October 2, 2013, the Company acquired 100% of the equity interest in FiberLink, an Illinois limited liability company, for cash consideration of $43.1 million which was primarily funded with available funds drawn on the Company’s revolving credit facility. The acquisition was considered an asset purchase for tax purposes. CoreXchange, Inc. ("CoreXchange") On March 4, 2014, the Company 100% consummated the asset purchase agreement to acquire CoreXchange, a data center, bandwidth and managed services provider located in Dallas, Texas for consideration of $17.2 million net of cash acquired. Through the transaction, the Company acquired one new data center operation located at 8600 Harry Hines Blvd. and secured additional square footage in its existing data center. The consideration was paid with cash on hand. The acquisition was considered an asset purchase for tax purposes. Geo Networks Limited ("Geo") On May 16, 2014, the Company acquired 100% of the equity interest in Ego Holdings Limited, a London-based dark fiber provider. The consideration consisted of cash of £174.3 million (or $292.3 million), net of cash acquired, and was funded with a combination of cash on hand and available funds drawn on the Company’s revolving credit facility. In conjunction with the acquisition, the Company repaid Geo’s existing debt obligations to the note holders totaling £113.4 million and £69.1 million was paid to the shareholders. The acquisition was considered a stock purchase for tax purposes. Acquisitions During the Year Ended June 30, 2013 AboveNet, Inc. (“AboveNet”) On July 2, 2012, the Company acquired 100% of the outstanding capital stock of AboveNet, previously a publicly traded company listed on the NYSE, in exchange for cash of approximately $2,210.0 million, net of cash acquired. The purchase price was based upon the price of $84.00 per share agreed to in the Agreement and Plan of Merger and the number of AboveNet shares outstanding on July 2, 2012. The acquisition was funded through cash proceeds raised through financing transactions that occurred in July 2012. The acquisition was considered a stock purchase for tax purposes. FiberGate Holdings, Inc. (“FiberGate”) On August 31, 2012, the Company acquired 100% of the equity interest in FiberGate, a privately held corporation, for total consideration of $118.3 million. The acquisition was funded with cash on hand. $17.6 million of the purchase price is currently held in escrow pending the expiration of the working capital and indemnification adjustment period. The acquisition was considered a stock purchase for tax purposes. USCarrier Telecom, LLC (“USCarrier”) In connection with the October 1, 2010 American Fiber Systems acquisition, the Company acquired an ownership interest in USCarrier. As of June 30, 2012, the Company owned 55% of the outstanding Class A membership units and 34% of the outstanding Class B membership units of USCarrier. On October 1, 2012, the Company acquired the remaining equity interests in USCarrier not previously owned for total consideration of $16.1 million. The purchase price was paid with cash on hand. The acquisition was considered an asset purchase for tax purposes. First Telecom Services, LLC (“First Telecom”) On December 14, 2012, the Company acquired 100% of the equity interest in First Telecom, for total consideration of $109.7 million. The purchase price was paid with cash on hand. The acquisition was considered an asset purchase for tax purposes. Litecast/Balticore, LLC (“Litecast”) On December 31, 2012, the Company acquired 100% of the equity interest in Litecast for total consideration of $22.2 million. The purchase price was paid with cash on hand. The acquisition was considered an asset purchase for tax purposes. Core NAP, L.P. (“Core NAP”) On May 31, 2013, the Company acquired substantially all of the net assets of Core NAP for a purchase price of approximately $7.1 million. The purchase price was paid with cash on hand. The acquisition was considered an asset purchase for tax purposes. Acquisition Method Accounting Estimates The Company initially recognizes the assets and liabilities acquired from the aforementioned 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 no longer than a one year period 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. As of June 30, 2015, the Company has not completed its fair value analysis and calculations in sufficient detail necessary to arrive at the final estimates of the fair value of certain working capital and non-working capital acquired assets and assumed liabilities, including the allocations to property, plant and equipment, goodwill and intangible assets, deferred revenue and resulting deferred taxes related to its acquisitions of IdeaTek and Latisys. All information presented with respect to certain working capital and non-working capital acquired assets and liabilities assumed as it relates to these acquisitions are preliminary and subject to revision pending the final fair value analysis. During the first quarter of Fiscal 2015, the Company finalized its fair value analysis and resulting purchase accounting for the Access and FiberLink acquisitions. During the third quarter of Fiscal 2015, the Company finalized its fair value analysis and resulting purchase accounting for the CoreXchange acquisition. During the fourth quarter of Fiscal 2015, the Company finalized its fair value analysis and resulting purchase accounting for the Geo, AtlantaNAP and Neo acquisitions. The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2015 acquisitions (in millions): AtlantaNAP Neo IdeaTek Latisys Acquisition date July 1, 2014 July 1, 2014 January 1, 2015 February 23, 2015 Cash $ — $ 4.2 $ — $ 9.4 Other current assets 0.2 9.5 0.8 17.1 Property and equipment 7.0 31.3 32.3 222.9 Deferred tax assets, net — — 2.9 — Intangibles 21.0 26.4 7.6 250.2 Goodwill 25.2 32.5 38.8 279.8 Other assets — 2.3 — 5.0 Total assets acquired 53.4 106.2 82.4 784.4 Current liabilities 1.5 13.5 4.5 10.7 Deferred revenue — 3.7 25.2 3.2 Deferred tax liability, net — 7.6 — 83.6 Other liabilities — 3.3 — — Total liabilities assumed 1.5 28.1 29.7 97.5 Net assets acquired 51.9 78.1 52.7 686.9 Less cash acquired — (4.2 ) — (9.4 ) Net consideration paid $ 51.9 $ 73.9 $ 52.7 $ 677.5 The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2014 acquisitions (in millions): Corelink Access FiberLink CoreXchange Geo Acquisition date August 1, 2013 October 1, 2013 October 2, 2013 March 4, 2014 May 16, 2014 Cash $ 0.1 $ 1.2 $ — $ — $ 13.7 Other current assets 0.5 2.3 0.8 0.6 8.8 Property and equipment 15.9 11.5 15.9 3.1 220.4 Deferred tax assets, net — — 7.7 0.2 — Intangibles 0.2 18.0 19.3 11.0 60.8 Goodwill 2.9 24.0 19.8 3.4 113.8 Other assets 0.5 — 0.1 — 9.8 Total assets acquired 20.1 57.0 63.6 18.3 427.3 Current liabilities 0.7 1.0 1.3 0.5 34.8 Deferred revenue 0.2 5.1 19.2 0.4 45.1 Capital lease obligations 14.2 — — 0.2 — Deferred tax liability, net 3.0 9.6 — — 38.2 Other liabilities — — — — 3.2 Total liabilities assumed 18.1 15.7 20.5 1.1 121.3 Net assets acquired 2.0 41.3 43.1 17.2 306.0 Less cash acquired (0.1 ) (1.2 ) — — (13.7 ) Net consideration paid $ 1.9 $ 40.1 $ 43.1 $ 17.2 $ 292.3 The table below reflects the Company's estimates of the acquisition date fair values of the acquired assets and liabilities assumed from its Fiscal 2013 acquisitions (in millions): AboveNet Fibergate US Carrier First Telecom Litecast Core NAP Acquisition date July 2, 2012 August 31, 2012 October 1, 2012 December 14, 2012 December 14, 2012 May 31, 2013 Cash $ 141.6 $ 2.3 $ — $ — $ — $ — Other current assets 46.5 4.9 1.3 5.9 0.3 0.2 Property and equipment 1,477.3 59.0 19.4 63.5 0.4 2.5 Deferred tax assets, net 42.1 — 2.0 19.2 — — Intangibles 480.4 35.9 6.8 17.1 12.5 4.1 Goodwill 381.6 53.8 5.4 48.4 9.9 1.0 Other assets 12.6 — — 0.1 — — Total assets acquired 2,582.1 155.9 34.9 154.2 23.1 7.8 Current liabilities 78.4 1.5 3.7 4.6 0.2 0.5 Deferred revenue 146.0 2.5 2.2 39.9 0.7 — Other liabilities 6.1 — — — — 0.2 Deferred tax liability, net — 31.3 — — — — Total liabilities assumed 230.5 35.3 5.9 44.5 0.9 0.7 Net assets acquired 2,351.6 120.6 28.9 109.7 22.2 7.1 Cost method investment in USCarrier — — (12.8 ) — — — Less cash acquired (141.6 ) (2.3 ) — — — — Net consideration paid $ 2,210.0 $ 118.3 $ 16.1 $ 109.7 $ 22.2 $ 7.1 The goodwill arising from the Company's acquisitions results from the cost synergies, anticipated incremental sales to the acquired company's customer base and economies-of-scale expected from the acquisitions. The Company has allocated the goodwill to the reporting units (in existence on the respective acquisition dates) that were expected to benefit from the acquired goodwill. The allocation was determined based on the excess of the fair value of the acquired business over the fair value of the individual assets acquired and liabilities assumed that were assigned to the reporting units. Note 6 - Goodwill Purchase Accounting Estimates Associated with Deferred Taxes The Company acquired material deferred tax assets and/or liabilities in its acquisitions of Latisys, Geo and AboveNet. Based on the Company’s fair value assessment related to deferred tax assets acquired in the Latisys, Geo and AboveNet acquisitions, a value of $(83.6) million, $(38.2) million, and $42.1 million, respectively, was assigned to the acquired net deferred tax (liabilities)/asset. In conjunction with the acquisition accounting for Latisys and AboveNet, the Company completed a “change in ownership” analysis, within the meaning of Section 382 of the Internal Revenue Code (“IRC”). Section 382 of the IRC limits an acquiring company’s ability to utilize net operating loss carry forwards (“NOLs”) previously generated by an acquired company in order to reduce future taxable income. As a result of the Company’s acquisition of Latisys and AboveNet, the Company is subject to annual limitations on usage of the acquired $126.3 million and $1,008.8 million of NOLs generated by Latisys and AboveNet prior to the acquisition date. The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in millions): Latisys Geo AboveNet February 23, May 16, 2014 July 2, 1012 Deferred income tax assets: Net operating loss carryforwards $ 49.9 $ 2.5 $ 405.3 Deferred revenue 1.1 4.4 49.1 Accrued expenses 0.1 — 12.2 Allowance for doubtful accounts 0.3 — 2.5 Other 0.4 — — Total deferred income tax assets 51.8 6.9 469.1 Deferred income tax liabilities: Property and equipment (42.3 ) (32.9 ) (250.0 ) Intangible assets (93.1 ) (12.2 ) (177.0 ) Total deferred income tax liabilities (135.4 ) (45.1 ) (427.0 ) Net deferred income tax asset/(liabilities) $ (83.6 ) $ (38.2 ) $ 42.1 Adjustments to Purchase Accounting Estimates Associated with Prior Year Acquisitions During Fiscal 2015, the Company finalized its acquisition accounting for acquisitions consummated during Fiscal 2014 resulting in adjustments to previously reported allocation of the purchase consideration associated with its Fiscal 2014 acquisitions. The adjustments were a result of changes to the original fair value estimates of certain items acquired. These changes are the result of additional information obtained since June 30, 2014 that related to facts and circumstances that existed at the respective acquisition dates. The Company has recast the previously reported consolidated balance sheet as of June 30, 2014 in connection with the finalization of acquisition accounting for these acquisitions. The Company did not recast the previously reported consolidated statement of operations for the year ended June 30, 2014 due to the immaterial effect of the related adjustments. The following table reflects the financial statement captions impacted by the purchase accounting adjustments: Adjusted Balance June 30, 2014 Previously Reported Balance* June 30, 2014 Purchase accounting adjustment Assets Current assets Trade receivables, net 57.2 59.0 (1.8 ) Prepaid expenses 24.9 25.6 (0.7 ) Deferred income taxes, net 161.0 160.4 0.6 Total current assets 243.1 245.0 (1.9 ) Property and equipment, net 2,822.4 2,821.4 1.0 Intangible assets, net 710.3 709.7 0.6 Goodwill 866.7 845.3 21.4 Other assets 37.7 37.8 (0.1 ) Total assets $ 4,680.2 $ 4,659.2 $ 21.0 Liabilities Current liabilities Accounts payable 26.7 27.0 (0.3 ) Accrued liabilities 172.3 159.6 12.7 Total current liabilities 199.0 186.6 12.4 Capital lease obligation, non-current 25.7 22.9 2.8 Deferred revenue, non-current 501.5 496.9 4.6 Deferred income taxes, net 153.0 151.8 1.2 Total liabilities $ 879.2 $ 858.2 $ 21.0 * As reported on Form 10-Q filed with the SEC on May 13, 2015 Transaction Costs Transaction costs include expenses associated with professional services (i.e., legal, accounting, regulatory, etc.) rendered in connection with signed and/or closed acquisitions or disposals (including spin-offs), travel expense, severance expense incurred on the date of acquisition or disposal, and other direct expenses incurred that are associated with such acquisitions or disposals. The Company incurred transaction costs of $5.9 million, $4.5 million, and $14.2 million, during the years ended June 30, 2015, 2014 and 2013, respectively. Transaction costs have been included in selling, general and administrative expenses in the consolidated statements of operations and in cash flows from operating activities in the consolidated statements of cash flows during these periods. Pro-forma Financial Information (Unaudited) The pro forma results presented below include the effects of the Company’s Fiscal 2015 and 2014 acquisitions as if the acquisitions occurred on July 1, 2013. The pro forma net loss for the periods ended June 30, 2015 and 2014 includes the additional depreciation and amortization resulting from the adjustments to the value of property and equipment and intangible assets resulting from purchase accounting and adjustment to amortized revenue during Fiscal 2015 and 2014 as a result of the acquisition date valuation of assumed deferred revenue. The pro forma results also include interest expense associated with debt used to fund the acquisitions. The pro forma results do not include any anticipated synergies or other expected benefits of the acquisitions. The unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisitions been consummated as of July 1, 2013. Year Ended June 30, 2015 2014 Revenue $ 1,420.2 $ 1,329.6 Net loss $ (182.4 ) $ (221.5 ) The Company is unable to determine the amount of revenue associated with each acquisition recognized in the post-acquisition period as a result of integration activities.

Transfer of Zayo Professional S

Transfer of Zayo Professional Services	12 Months Ended
	Jun. 30, 2015
Discontinued Operations And Disposal Groups [Abstract]
Transfer of Zayo Professional Services	(4) TRANSFER OF ZAYO PROFESSIONAL SERVICES On July 1, 2014, Zayo Professional Services ("ZPS"), a professional services business that provides network management and technical resources to customers, was transferred from Holdings to the Company. All of the assets and liabilities of ZPS were transferred to the Company as of July 1, 2014 and the transaction was accounted for as an equity transaction at carryover basis, as it was considered to be between entities under common control. The historical results of the Company, including the consolidated financial statements and footnotes, have been recast to include ZPS's historical financial results for all periods presented herein. See Note 1 - Business and Basis of Presentation Reclassification of Network Related Expenses and Zayo Professional Services

Property and Equipment

Property and Equipment	12 Months Ended
	Jun. 30, 2015
Property Plant And Equipment [Abstract]
Property and Equipment	(5) PROPERTY AND EQUIPMENT Property and equipment, including assets held under capital leases, was comprised of the following (in millions): Estimated useful lives As of June 30, (in years) 2015 2014 Land N/A $ 16.2 $ 0.7 Building leasehold and site improvements 15 to 20 109.2 64.7 Furniture, fixtures and office equipment 3 to 7 5.1 5.7 Computer hardware 3 to 5 15.1 16.7 Software 3 8.3 9.3 Machinery and equipment 5 to 7 272.1 94.9 Fiber optic equipment 8 623.3 583.7 Circuit switch equipment 10 12.1 11.8 Packet switch equipment 5 76.2 62.8 Fiber optic network 15 to 20 2,715.4 2,450.8 Construction in progress N/A 437.1 259.0 Total 4,290.1 3,560.1 Less accumulated depreciation (990.9 ) (737.7 ) Property and equipment, net $ 3,299.2 $ 2,822.4 Total depreciation expense, including depreciation of assets held under capital leases, for the years ended June 30, 2015, 2014 and 2013 was $351.4 million, $294.2 million and $280.1 million, respectively. During the years ended June 30, 2015, 2014 and 2013, the Company capitalized interest in the amounts of $12.5 million, $12.6 million and $13.0 million, respectively. The Company capitalized $58.3 million, $42.7 million, and $28.6 million of direct labor costs to property and equipment accounts during the years ended June 30, 2015, 2014 and 2013, respectively. During the year ended June 30, 2015, the Company wrote-off $93.4 million in fully depreciated property and equipment.

Goodwill

Goodwill	12 Months Ended
	Jun. 30, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	(6) GOODWILL The Company’s goodwill balance was $1,224.4 million and $866.7 million as of June 30, 2015 and 2014, respectively. The Company’s reporting units are comprised of its strategic product groups (“SPGs”): Zayo Dark Fiber (“Dark Fiber”), Zayo Wavelength Services (“Waves”), Zayo SONET Services (“SONET”), Zayo Ethernet Services (“Ethernet”), Zayo IP Services (“IP”), Zayo Mobile Infrastructure Group (“MIG”), Zayo Colocation (“zColo"), Zayo Cloud Services (“Cloud”) and Other (primarily ZPS). The following reflects the changes in the carrying amount of goodwill during Fiscal 2015 (in millions): Product Group As of July 1, 2014 Fiscal 2015 Acquisitions Foreign Currency Translation and Other As of June 30, 2015 Dark Fiber $ 293.3 $ 16.0 $ (10.2 ) $ 299.1 Waves 269.0 1.4 (4.8 ) 265.6 Sonet 50.3 — — 50.3 Ethernet 96.7 8.2 (0.7 ) 104.2 IP 80.5 6.8 (1.0 ) 86.3 MIG 43.7 29.8 (0.1 ) 73.4 zColo 18.6 256.0 (1.4 ) 273.2 Cloud — 57.2 (0.2 ) 57.0 Other 14.6 0.9 (0.2 ) 15.3 Total $ 866.7 $ 376.3 $ (18.6 ) $ 1,224.4 The following reflects the changes in the carrying amount of goodwill during Fiscal 2014 (in millions): Product Group As of July 1, 2013 Fiscal 2014 Acquisitions Foreign Currency Translation and Other As of June 30, 2014 Dark Fiber $ 193.3 $ 97.4 $ 2.6 $ 293.3 Waves 215.9 49.6 3.5 269.0 Sonet 50.3 — — 50.3 Ethernet 91.7 4.9 0.1 96.7 IP 80.1 0.2 0.2 80.5 MIG 38.3 5.4 — 43.7 zColo 11.9 6.4 0.3 18.6 Other 7.3 — 7.3 14.6 Total $ 688.8 $ 163.9 $ 14.0 $ 866.7

Intangible Assets

Intangible Assets	12 Months Ended
	Jun. 30, 2015
Intangible Assets Net Excluding Goodwill [Abstract]
Intangible Assets	(7) INTANGIBLE ASSETS Identifiable acquisition-related intangible assets as of June 30, 2015 and 2014 were as follows (in millions): Gross Carrying Amount Accumulated Amortization Net June 30, 2015 Finite-Lived Intangible Assets Customer relationships $ 1,080.3 $ (155.0 ) $ 925.3 Trade names 0.2 (0.1 ) 0.1 Underlying rights 1.7 (0.2 ) 1.5 Total 1,082.2 (155.3 ) 926.9 Indefinite-Lived Intangible Assets Certifications 3.5 — 3.5 Underlying Rights 17.9 — 17.9 Total $ 1,103.6 $ (155.3 ) $ 948.3 June 30, 2014 Finite-Lived Intangible Assets Customer relationships $ 789.2 $ (103.6 ) $ 685.6 Trade names 0.1 — 0.1 Underlying rights 1.8 (0.1 ) 1.7 Total 791.1 (103.7 ) 687.4 Indefinite-Lived Intangible Assets Certifications 3.5 — 3.5 Underlying rights 19.4 — 19.4 Total $ 814.0 $ (103.7 ) $ 710.3 The weighted average remaining amortization period for the Company’s customer relationships and trade name assets is 16.3 years and 1.0 years, respectively. The Company has determined that certain underlying rights (including easements) and the certifications have indefinite lives. The amortization period for underlying rights (including easements) is 20 years. The amortization of intangible assets for the years ended June 30, 2015, 2014 and 2013 was $54.8 million, $44.0 million, and $44.4 million, respectively. During the years ended June 30, 2015 and 2014, the Company wrote off $3.5 million and $27.2 million in fully amortized intangible assets, respectively. Estimated future amortization of finite-lived intangible assets is as follows (in millions): Year Ended June 30, 2016 $ 66.3 2017 66.2 2018 66.2 2019 66.2 2020 62.6 Thereafter 599.4 Total $ 926.9

Long-Term Debt

Long-Term Debt	12 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Long-Term Debt	(8) LONG-TERM DEBT As of June 30, 2015 and 2014, long-term debt was as follows (in millions): 2015 2014 Term Loan Facility due 2021 $ 1,646.8 $ 2,010.8 8.125% Senior Secured Notes due 2020 — 750.0 10.125% Senior Unsecured Notes due 2020 325.6 500.0 6.00% Senior Unsecured Notes Due 2023 1,430.0 — 6.375% Senior Unsecured Notes Due 2025 350.0 — Total debt obligations 3,752.4 3,260.8 Unamortized discount on Term Loan Facility (19.8 ) (20.6 ) Unamortized premium on 6.00% Senior Unsecured Notes 7.1 — Unamortized debt issuance costs (71.0 ) (89.4 ) Carrying value of debt 3,668.7 3,150.8 Less current portion (16.5 ) (20.5 ) Long-term debt, less current portion $ 3,652.2 $ 3,130.3 On July 2, 2012, the Company and Zayo Capital, Inc. (“Zayo Capital”) issued $750.0 million aggregate principal amount of 8.125% senior secured first-priority notes due 2020 (the “2020 Secured Notes”) and $500.0 million aggregate principal amount of 10.125% senior unsecured notes due 2020 (the “2020 Unsecured Notes”, and together with the 2020 Secured Notes, the “2020 Notes”). On July 2, 2012, the Company also entered into a $250.0 million senior secured revolving credit facility (the “Revolver”) and a $1,620.0 million senior secured term loan facility (the “Term Loan Facility”), both of which have been subsequently amended (the “Credit Agreement”). The Term Loan Facility was issued at a discount of $30.0 million and has a maturity date of July 2019. The issue discount is being amortized to interest expense over the term of the loan. The terms of the amended Term Loan Facility require the Company to make quarterly principal payments of $5.1 million plus an annual payment of up to 50% of excess cash flow, as determined in accordance with the Credit Agreement (no such payment was required during the years ended June 30, 2015 and 2014, respectively). A portion of the net proceeds from the Existing Notes and the Term Loan Facility, together with cash on hand and equity contributions (See Note 11 —Equity In connection with the debt extinguishment activities discussed above, the Company recognized an expense in July 2012 of $65.0 million associated with debt extinguishment costs, including a cash expense of $39.8 million associated with the payment of early redemption fees on the Company’s previous indebtedness and non-cash expenses of $17.0 million associated with the write-off of the Company’s unamortized debt issuance costs and $8.2 million associated with writing-off the net unamortized discount on the debt balances extinguished. On October 5, 2012, the Company and Zayo Capital entered into a second amendment (the “Second Amendment”) to the Credit Agreement governing its Term Loan Facility and Revolver. Under the terms of the Second Amendment, effective October 5, 2012, the interest rate on the Term Loan Facility was adjusted to bear an interest rate at LIBOR plus 4.0% (subject to a 5.25% floor), which represented a decrease of 187.5 basis points from the original Credit Agreement. The Second Amendment also reduced the interest rate on the Revolver by 187.5 basis points. On February 27, 2013, the Company and Zayo Capital entered into a Fourth Amendment (the “Fourth Amendment”) to the Company’s Credit Agreement. Under the terms of the Fourth Amendment, effective February 27, 2013, the interest rate on the Term Loan Facility was further adjusted to bear interest at LIBOR plus 3.5% (subject to a 4.5% floor). The amended terms represent a downward adjustment of 50 basis points on the spread and a further 25 basis point reduction minimum floor. Under the terms of the Fourth Amendment, the Revolver bore interest at LIBOR plus 3.00%, based on the Company’s current leverage ratio, which represented a 50 basis point reduction. The Fourth Amendment also amended certain terms and provisions of the Credit Agreement, including removing the senior secured and total leverage maintenance covenants and increasing the total leverage ratio required to be met in order to incur certain additional indebtedness from 5.00:1.00 to 5.25:1.00 as a multiple of EBITDA (as defined in the Credit Agreement). In connection with the aforementioned amendments, the Company incurred early redemption call premiums of $16.2 million and $16.1 million for the Second Amendment and Fourth Amendment, respectively. The early redemption call premiums were paid with cash on hand to the syndicate of creditors in the Term Loan Facility. Prior to the consummation of the amendments, the Company requested the consent of all creditors holding balances in the Term Loan Facility to the amended terms. $15.3 million and $15.0 million of the early call premium paid to consenting creditors in the Second and Fourth Amendments, respectively, were accounted for as additional debt issuance costs for the modified obligations during the year ended June 30, 2013, which are being amortized over the term of the Term Loan Facility using the effective interest method. The remaining call premium of $0.9 million and $1.1 million associated with the Second and Fourth Amendments, respectively, that was paid to non-consenting creditors has been recorded as a loss on extinguishment of debt on the consolidated statements of operations for the year ended June 30, 2013. Existing and/or new creditors replaced the non-consented commitments, such that the full amount of the Term Loan Facility’s commitments were replaced in both the Second and Fourth Amendments. In connection with the Second and Fourth Amendments, the Company recognized an expense of $12.2 million during the year ended June 30, 2013 associated with debt extinguishment costs. The loss on extinguishment of debt associated with the amendments includes the aforementioned early call premiums paid to non-consenting creditors, non-cash expense associated with the write off of unamortized debt issuance costs and issuance discounts on the debt balances accounted for as an extinguishment, and certain fees paid to third parties involved in the amendments. On November 26, 2013, the Company and Zayo Capital entered into a Fifth Amendment (the “Fifth Amendment”) to the Company’s Credit Agreement. Under the terms of the Fifth Amendment, the Term Loan Facility was increased by $150.0 million to $1,749.8 million and the interest rate was adjusted to LIBOR plus 3.0% with a minimum LIBOR rate of 1.0%. The amended terms represented a downward adjustment of 50 basis points on the interest rate from the Fourth Amendment. The interest rate on the Revolver was amended to LIBOR plus 2.75% (based on the Company’s then current leverage ratio), which represented a downward adjustment of 25 basis points on the interest rate from the Fourth Amendment. In connection with the Fifth Amendment, the Company did not incur a re-pricing premium. Also, in connection with the Fifth Amendment, the Company recognized an expense during the second quarter of Fiscal 2014 of $1.9 million associated with debt extinguishment costs, including cash expense of $1.0 million related to third party costs and non-cash expense of $0.9 million associated with the write-off of the Company’s unamortized debt issuance costs and discount on the Term Loan Facility accounted for as an extinguishment. The Company also incurred an additional $1.5 million in debt issuance costs in the second quarter of Fiscal 2014. On May 16, 2014, the Company and Zayo Capital Inc. entered into a Sixth Amendment (the “Sixth Amendment”) to the Credit Agreement. Per the terms of the Sixth Amendment, the Company’s Term Loan Facility was increased by $275.0 million to $2,015.9 million and bears interest at the existing rate of LIBOR plus 3.0 percent with a minimum LIBOR rate of 1.0 percent. The $275.0 million add-on was priced at 99.5 percent. No other terms of the Credit Agreement were amended. In connection with the Sixth Amendment, the Company incurred an additional $3.2 million in debt issuance costs and $1.4 million was recorded as a discount. On December 15, 2014, the Company redeemed $75.0 million of its outstanding 2020 Secured Notes at a price of 108.125% of the principal amount and $174.4 million of its outstanding 2020 Unsecured Notes at a price of 110.125% (collectively, the “December Notes Redemption”). As part of the Note Redemption, the Company recorded an early redemption call premium of $23.8 million which has been recorded as a loss on extinguishment of debt on the consolidated statements of operations in Fiscal 2015. On January 23, 2015, the Company and Zayo Capital (together “the Issuers”) completed a private offering (the “January Notes Offering”) of $700.0 million aggregate principal amount of 6.00% senior unsecured notes due in 2023 (the “2023 Unsecured Notes”). On March 9, 2015, the Issuers completed a private offering of an additional $730.0 million aggregate principal amount of 2023 Unsecured Notes at a premium of 1% (the “March Notes Offering”, and together with the January Notes Offering, the “2023 Notes Offerings”) resulting in aggregate gross proceeds for the 2023 Unsecured Notes of $1,437.3 million. The issue premium of $7.3 million on the March Notes Offerings is being accreted against interest expense over the term of the notes under the effective interest method. The 2023 Unsecured Notes bear interest at the rate of 6.00% per year, which is payable on April 1 and October 1 of each year, beginning on October 1, 2015. The 2023 Unsecured Notes will mature on April 1, 2023. The net proceeds from the January Notes Offering were used to fund the Latisys acquisition (see Note 3 – Acquisitions On April 17, 2015, the Company entered into a Seventh Amendment (the “Seventh Amendment”) to the Credit Agreement. Per the terms of the Seventh Amendment, the Revolver was increased by $200.0 million to $450.0 million, and its maturity date was extended to the earliest of (i) five years after the effective date of the Seventh Amendment, (ii) six months prior to the maturity date of the Company’s Term Loan Facility, subject to amendment thereof, and (iii) six months prior to the maturity date of the Company’s 2020 Unsecured Notes, subject to repayment or amendment thereof. The Seventh Amendment also increased the letter of credit commitment from $30.0 to $50.0 and provided that, in the event that the Term Loan Facility was amended or refinanced to remove all financial maintenance covenants, the Fixed Charge Coverage Ratio maintenance requirement would be replaced with a springing Senior Secured Leverage Ratio maintenance requirement applicable only to the Revolver. Further, pursuant to the Seventh Amendment, up to $50.0 of revolving loans and letters of credit may be denominated in or issued in, as applicable, Euros or British Pound Sterling. Further, pursuant to the Seventh Amendment, up to $50.0 million of revolving loans and letters of credit may be denominated in or issued in, as applicable, Euros or British Pound Sterling. On May 6, 2015, the Company and Zayo Capital issued $350.0 million aggregate principal amount of 6.375% senior unsecured notes due in 2025 (the “2025 Senior Unsecured Notes”). Interest on the 2025 Unsecured Notes is payable on May 15 and November 15 of each year, beginning on November 15, 2015. The 2025 Unsecured Notes will mature on May 15, 2025. The net proceeds from the 2025 Senior Unsecured Notes were used to repay $344.5 million of the Company’s Term Loan Facility. As a result of the repayment, the Company recorded a loss on extinguishment of debt of $8.4 million. On May 6, 2015, the Company entered into an Amendment and Restatement Agreement whereby the Credit Agreement was amended and restated in its entirety. The amended and restated Credit Agreement extended the maturity date of all of the outstanding term loans under the Term Loan Facility to May 6, 2021. The interest rate margins applicable to the Term Loan Facility were decreased by 25 basis points to LIBOR plus 2.75% with a minimum LIBOR of 1.0%. In addition, the amended and restated Credit Agreement removed the Fixed Charge Coverage Ratio covenant and replaced such covenant with a springing Senior Secured Leverage Ratio maintenance requirement applicable only to the Revolver, increased certain lien and debt baskets, and removed certain covenants related to collateral. Interest rates on the Term Loan Facility and Revolver as of June 30, 2015 were 3.75% and 3.0%, respectively. As of June 30, 2015, no amounts were outstanding under the Revolver. Standby letters of credit were outstanding in the amount of $9.2 million as of June 30 2015, leaving $440.8 million available under the Revolver as of June 30, 2015. The Revolver is subject to a i) fee per annum of 0.25% to 0.375% (based on the Company’s current leverage ratio) of the weighted-average unused capacity and ii) the undrawn amount of outstanding letters of credit backed by the Revolver are subject to a 0.25% fee per annum. Outstanding letters of credit backed by the Revolver accrue interest at a rate ranging from LIBOR plus 2.0% to LIBOR plus 3.0% per annum based upon the Company’s leverage ratio. The Revolver has a maturity date of January 2020. Debt covenants The indentures (the “Indentures”) governing the 2020 Unsecured Notes, the 2023 Unsecured Notes and the 2025 Unsecured Notes (collectively the “Notes”) contain covenants that, among other things, restrict the ability of the Company and its subsidiaries to incur additional indebtedness and issue preferred stock; pay dividends or make other distributions with respect to any equity interests, make certain investments or other restricted payments, create liens, sell assets, incur restrictions on the ability of the Company’s restricted subsidiaries to pay dividends or make other payments to the Company, consolidate or merge with or into other companies or transfer all or substantially all of their assets, engage in transactions with affiliates, and enter into sale and leaseback transactions. The terms of the Indentures include customary events of default. The Credit Agreement contains customary events of default, including among others, non-payment of principal, interest, or other amounts when due, inaccuracy of representations and warranties, breach of covenants, cross default to certain other indebtedness, insolvency or inability to pay debts, bankruptcy, or a change of control. The Credit Agreement also contains a covenant, applicable only to the Revolver, that the Company maintains a senior secured leverage ratio below 5.25:1.00 at any time when the aggregate principal amount of loans outstanding under the Revolver is greater than 35% of the commitments under the Revolver. The Indentures governing the 2020 Unsecured Notes limit any increase in the Company’s secured indebtedness (other than certain forms of secured indebtedness expressly permitted under the indentures) to a pro forma secured debt ratio of 4.50 times the Company’s previous quarter’s annualized modified EBITDA, as defined in the Indentures, and limit the Company’s incurrence of additional indebtedness to a total indebtedness ratio of 5.25 times the previous quarter’s annualized modified EBITDA. The indentures governing the 2023 Unsecured Notes and the 2025 Unsecured Notes limit any increase in the Company’s secured indebtedness (other than certain forms of secured indebtedness expressly permitted under such indentures) to a pro forma secured debt ratio of 4.50 times the Company’s previous quarter’s annualized modified EBITDA (as defined in the indentures), and limit the Company’s incurrence of additional indebtedness to a total indebtedness ratio of 6.00 times the previous quarter’s annualized modified EBITDA. The Company was in compliance with all covenants associated with its debt agreements as of June 30, 2015 and 2014. Redemption rights At any time prior to May 15, 2018 (for the 2025 Unsecured Notes), April 1, 2018 (for the 2023 Unsecured Notes) and July 1, 2016 (for the 2020 Unsecured Notes) the Company may redeem all or part of the applicable Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) accrued interest and a “make-whole” premium, which is a lump sum payment derived from a formula based on the net present value of future coupon payments that will not be paid because of the early redemption. On or after May 1, 2020 ( for the 2025 Unsecured Notes for the 2023 Unsecured Notes July 1, 2016 (for the 2020 Unsecured Notes) Year Redemption Price (2020 Unsecured Notes) 2016 105.063% 2017 102.531% 2018 and thereafter 100.000% Year Redemption Price (2023 Unsecured Notes) 2018 104.500% 2019 103.000% 2020 101.500% 2021 and thereafter 100.000% Year Redemption Price (2025 Unsecured Notes) 2020 103.188% 2021 102.125% 2022 101.063% 2023 and thereafter 100.000% The Company may purchase the Notes in open-market transactions, tender offers, or otherwise. The Company is not required to make any mandatory redemption or sinking fund payments with respect to the Notes. Aggregate future contractual maturities of long-term debt (excluding issue discounts and premiums) were as follows as of June 30, 2015 (in millions): Year Ended June 30, 2016 $ 16.5 2017 16.5 2018 16.5 2019 16.5 2020 16.5 Thereafter 3,669.9 Total $ 3,752.4 Guarantees The Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by all of the Company’s current and future domestic restricted subsidiaries. The Notes were co-issued with Zayo Capital, which does not have independent assets or operations. Debt issuance costs In connection with the Credit Agreement (and subsequent amendments thereto), and the various Note offerings, the Company incurred debt issuance costs of $99.3 million (net of extinguishments). These costs are being amortized to interest expense over the respective terms of the underlying debt instruments using the effective interest method, unless extinguished earlier, at which time the related unamortized costs are to be immediately expensed. Unamortized debt issuance costs of $23.2 million, $0.7 million and $42.3 million associated with the Company’s previous indebtedness were recorded as part of the loss on extinguishment of debt during the years ended June 30, 2015, 2014 and 2013, respectively. The balance of debt issuance costs as of June 30, 2015 and June 30, 2014 was $71.0 million and $89.4 million, net of accumulated amortization of $28.3 million and $25.4 million, respectively. The amortization of debt issuance costs is included on the consolidated statements of cash flows within the caption “Non-cash interest expense” along with the amortization or accretion of the premium and discount on the Company’s indebtedness and changes in the fair value of the Company’s interest rate derivatives. Interest expense associated with the amortization of debt issuance costs was $13.9 million for the years ended June 30, 2015 and 2014 and $11.5 million during the year ended June 30, 2013. Debt issuance costs are presented in the consolidated balance sheets as a reduction to “Long-term debt, non-current”. Interest rate derivatives On August 13, 2012, the Company entered into forward-starting interest rate swap agreements with an aggregate notional value of $750.0 million, a maturity date of June 30, 2017, and a start date of June 30, 2013. There were no up-front fees for these agreements. The contract states that the Company shall pay a 1.67% fixed rate of interest for the term of the agreement beginning on the start date. The counter-party will pay to the Company the greater of actual LIBOR or 1.25%. The Company entered in to the forward-starting swap arrangements to reduce the risk of increased interest costs associated with potential changes in LIBOR rates. Changes in the fair value of interest rate swaps are recorded in interest expense in the consolidated statements of operations for the applicable period. The fair value of the interest rate swaps of $4.1 million and $2.0 million are included in “Other long term liabilities” in the Company’s consolidated balance sheet as of June 30, 2015 and 2014, respectively. During the year ended June 30, 2015, 2014 and 2013, $2.1 million, $4.6 million and $(2.6) were recorded as an increase/(decrease) in interest expense for the change in the fair value of the interest rate swaps.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	(9) INCOME TAXES The Company, a limited liability company, is taxed at the Holdings level. All income tax balances resulting from the operations of Zayo Group, on a separate return basis, are reflected in these financial statements. The Company’s (benefit)/provision for income taxes from operations are summarized as follows (in millions): The United States and foreign components of (loss)/benefit from operations before income taxes are as follows (in millions): Year Ended June 30, 2015 2014 2013 Current Income Taxes Federal $ 1.7 $ 6.3 $ — State 4.4 3.8 1.7 Foreign (1.6 ) 3.3 — Total $ 4.5 $ 13.4 $ 1.7 Deferred Income Taxes Federal $ (8.6 ) $ 26.3 $ (23.5 ) State (6.9 ) 1.2 (3.5 ) Foreign 2.3 (0.6 ) 3.5 Total (13.2 ) 26.9 (23.5 ) Total (benefit)/provision for income taxes $ (8.7 ) $ 40.3 $ (21.8 ) The United States and foreign components of loss from operations before income taxes are as follows (in millions): Year Ended June 30, 2015 2014 2013 United States $ (159.4 ) $ (127.8 ) $ (179.5 ) Foreign $ (4.4 ) $ (9.0 ) $ 15.8 Total $ (163.8 ) $ (136.8 ) $ (163.7 ) The Company’s effective income tax rate differs from what would be expected if the federal statutory rate were applied to earnings before income taxes primarily because of certain expenses that represent permanent differences between book and tax expenses and deductions, such as the stock-based compensation expense related to the Company’s CII common units that is recorded as an expense for financial reporting purposes but is not deductible for tax purposes. A reconciliation of the actual income tax provision and the tax computed by applying the U.S. federal rate to the earnings before income taxes during the years ended June 30, 2015, 2014 and 2013 are as follows (in millions): Year ended June 30, 2015 2014 2013 Expected benefit/provision at the statutory rate $ (57.3 ) $ (47.9 ) $ (57.1 ) Increase/(decrease) due to: Non-deductible stock-based compensation 59.4 96.5 35.6 State income taxes benefit, net of federal benefit (7.4 ) (6.3 ) (1.9 ) Transactions costs not deductible for tax purposes 0.7 0.8 1.3 Reversal of uncertain tax positions, net — (2.6 ) — State NOL adjustment — — 2.8 Change in effective tax rate (2.2 ) (0.3 ) — Change in valuation allowance — 1.3 — Foreign tax rate differential 0.6 1.0 (2.3 ) Other, net (2.5 ) (2.2 ) (0.2 ) (Benefit)/provision for income taxes $ (8.7 ) $ 40.3 $ (21.8 ) Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (millions): June 30, 2015 2014 Deferred income tax assets Net operating loss carry forwards $ 434.0 $ 415.6 Alternate minimum tax credit carryforwards 8.4 6.3 Deferred revenue 243.5 190.7 Accrued expenses 27.9 22.4 Other liabilities 14.4 7.6 Reserves against accounts receivable 10.2 6.4 Other 17.4 2.1 Total deferred income tax assets 755.8 651.1 Valuation allowance (1.1 ) (2.2 ) Net deferred tax assets 754.7 648.9 Deferred income tax liabilities Property and equipment 468.9 374.4 Intangible assets 327.2 239.3 Debt issuance costs 18.8 27.2 Total deferred income tax liabilities 814.9 640.9 Net deferred income tax assets/(liabilities) $ (60.2 ) $ 8.0 As of June 30, 2015, the Company had $1,115.0 million of federal net operating loss ("NOL") carry forwards. It utilized approximately $95.9 million during Fiscal 2015. The Company has completed several acquisitions in which it acquired net operating loss tax attributes as part of the purchase. These acquisitions, however, were considered a "change in ownership within the meaning of Section 382 of the Internal Revenue Code and, as a result, such NOL carry forwards are subject to an annual limitation, reducing the amount available to offset income tax liabilities absent the limitation. Currently available NOL carry forwards as of June 30, 2015 are approximately $485.9 million. An additional $185.9 million will become available for use during fiscal year ended June 30, 2016. The Company's NOL carry forwards, if not utilized to reduce taxable income in future periods, will expire in various amounts beginning in 2020 and ending in 2032. As of June 30, 2015, the Company had approximately $11.6 million of foreign jurisdiction net operating loss carry forwards, primarily in France. The majority of these foreign jurisdiction net operating loss carry forwards do not expire. As of June 30, 2015, the Company had tax-effected state net operating loss carry forwards of approximately $38.7 million, which are subject to limitations on their utilization and have various expiration dates through 2032. Management believes it is more likely than not that it will utilize its net deferred tax assets to reduce or eliminate tax payments in future periods, with the exception of deferred tax assets related to a foreign subsidiary. The Company’s evaluation encompassed (i) a review of its recent history of taxable income for the past three years and (ii) a review of internal financial forecasts demonstrating its expected ability to fully utilize its deferred tax assets prior to expiration. Release of Accrual for Uncertain Tax Position During Fiscal 2014, the Company released an accrual of $2.6 million related to an uncertain tax position previously recognized in connection with the FiberNet acquisition upon settlement of the matter with the Internal Revenue Service. The uncertain tax position was associated with a deduction taken for accelerated vesting of restricted stock units. This reduced the Company's estimated effective tax rate for the fiscal year ended June 30, 2014. The remaining accrual was recorded as a reduction of the deferred tax assets associated with the Company's net operating loss carry forwards. Unrecognized tax benefits represent the aggregate tax effect of differences between tax return positions and the amounts otherwise recognized in the Company’s financial statements, and as a result of the substantial NOL carry forwards, are netted against the Company’s deferred tax asset balance in the consolidated balance sheets. A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties, is as follows (in millions): Year Ended June 30, 2014 Balance, beginning of year $ 6.4 Decreases (6.4 ) Balance, end of year $ —

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Jun. 30, 2015
Payables And Accruals [Abstract]
Accrued Liabilities	(10) ACCRUED LIABILITIES Accrued liabilities included in current liabilities consisted of the following (in millions): Year Ended June 30, 2015 2014 Accrued compensation and benefits $ 19.4 $ 13.3 Accrued property and equipment purchases 54.7 46.2 Network expense accruals 77.2 79.2 Other accrued taxes 12.7 9.3 Accrued professional fees 3.4 3.9 Other accruals 15.0 20.4 Total $ 182.4 $ 172.3

Equity

Equity	12 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Equity	(11) EQUITY Zayo Group was initially formed on May 4, 2007, and is a wholly-owned subsidiary of Holdings. Prior to October 16, 2014, Holdings was a wholly owned subsidiary of CII (See Note 1 – Business). CII was organized on November 6, 2006, and subsequently capitalized on May 7, 2007, with capital contributions from various institutional and founder investors. Cash, property, and service proceeds from the capitalization of CII were contributed to the Company, and the contributions are reflected in the Company’s member’s equity. During the years ended June 30, 2015, 2014 and 2013, Holdings contributed $385.0 million, $5.6 million and $344.0 million, respectively, in cash to the Company. During the year ended June 30, 2015 there was a deemed modification to the Company’s stock compensation arrangements with employees and directors. The modification resulted in a reclassification of previously recorded stock-based compensation liability to member’s interest (see Note 12 – Stock-Based Compensation As discussed in Note 3— Acquisitions, Prior to the spin-off of Onvoy to CII, Holdings was the taxable parent of the Company and Onvoy Voice Services, Inc. (“Onvoy”). Holdings allowed for the sharing of Holdings’ NOL carry forwards between the Company and Onvoy. To the extent that any entity utilized NOLs or other tax assets that were generated or acquired by the other entity, the entities would settle the related-party transfer of deferred tax asset associated with such NOLs and other deferred-tax transfers between the companies via an increase or decrease to the respective entity’s member’s equity. During the years ended June 30, 2014 and 2013 $6.0 million $5.3 million

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	(12) STOCK-BASED COMPENSATION The following tables summarize the Company’s stock-based compensation expense for liability and equity classified awards included in the consolidated statements of operations (in millions). Year Ended June 30, Included in: 2015 2014 2013 Operating costs $ 23.3 $ 20.2 $ 7.7 Selling, general and administrative expenses 177.4 233.5 98.1 Total stock-based compensation expense $ 200.7 $ 253.7 $ 105.8 CII Common units $ 156.4 $ 253.3 $ 104.9 CII Preferred units 0.4 0.4 0.9 Part A restricted stock units 12.6 — — Part B restricted stock units 31.3 — — Total stock-based compensation expense $ 200.7 $ 253.7 $ 105.8 As of year ended June 30, 2015, there were 933,217 Part A RSUs outstanding and 1,249,873 Part B target RSUs outstanding. CII Common Units Prior to the Company’s IPO, the Company was given authorization by CII to award 625,000,000 of CII’s common units as profits interests to employees, directors, and affiliates of the Company. The common units were historically considered to be stock-based compensation with terms that required the awards to be classified as liabilities due to cash settlement features. The vested portion of the awards was reported as a liability and the fair value was re-measured at each reporting date until the date of settlement, with a corresponding charge (or credit) to stock-based compensation expense. In connection with the Company’s IPO and the related amendment to the CII operating agreement, there was a deemed modification to the stock compensation arrangements with the Company’s employees and directors. As a result, previously issued common units which were historically accounted for as liability awards, became classified as equity awards. Prior to reclassifying the common unit liability to equity, the Company re-measured the fair value of the CII common units factoring in the change in fair value since September 30, 2014 and the change in fair value caused by the modification. The fair value of these previously vested common units was estimated to be $490.2 million on the modification date and this amount is reflected in the Company’s consolidated statement of member’s equity as an increase to additional-paid-in-capital during the year ended June 30, 2015. The fair value of the unrecognized compensation expense associated with unvested CII common units is being recognized over the remaining vesting period of the Company’s outstanding common units through May 15, 2017. On October 9, 2014, the Company and CII’s board of managers approved a non-liquidating distribution by CII of shares of ZGH’s common stock held by CII to holders of CII vested common units. Employees and independent directors of the Company with vested CII common units received shares of ZGH’s common stock equal in value to the underlying value of their vested CII common units. The total number of shares of ZGH’s common stock that were distributed to CII common unit holders in connection with this non-liquidating distribution was 20,460,047 shares. Employees with unvested CII common units have and/or will continue to receive monthly distributions from CII of ZGH’s common stock as they vest under the original terms of the CII common unit grant agreements. A total of 6,353,302 shares of ZGH’s common stock associated with unvested CII common units that have or will be distributed subsequent to the IPO date. In addition, CII has and may in the future be required to distribute additional shares of ZGH’s common stock to CII common unit holder s on a quarterly basis through June 30, 2016 based on ZGH’s stock price performance, subject to the existing vesting provisions of the CII common units. The shares to be distributed to the common unit holders are based on a pre-existing distribution mechanism, whose primary input is ZGH’s stock price at each subsequent measurement date. Any remaining shares of common stock owned by CII will be distributed to the existing CII preferred unit holders. The total number of shares of ZGH’s common stock that have or will be distributed to existing CII preferred or common unit holders subsequent to the IPO date is 10,294,867 shares. The valuation of the CII common units as of the IPO date was determined based on a Monte Carlo simulation. The Monte Carlo valuation analysis attempts to approximate the probability of certain outcomes by running multiple trial runs, called simulations, using random variables to generate potential future stock prices. This valuation technique was used to estimate the fair value associated with future distributions of common stock to CII common unit holders. The Monte Carlo simulation first projects the number of shares to be distributed by CII to the common unit holders at each subsequent measurement date based on stock price projections under each simulation. Shares attributable to unvested CII common units are subject to the existing vesting provisions of the CII common unit awards. The estimated future value of shares scheduled to be distributed by CII based on vesting provisions are calculated under each independent simulation. The present value of the number of shares of common stock to be distributed to common unit holders under each simulation is then computed, and the average of each simulation is the fair value of ZGH’s common shares to be distributed by CII to the common unit holders. This value was then adjusted for prior non-liquidating distributions made by the Company to derive a value for CII common units by class and on per unit basis. These values were used to calculate the fair value of outstanding CII common units as of the IPO date. Various inputs and assumptions were utilized in the valuation method, including forfeiture behavior, vesting provisions, holding restrictions, peer companies’ historical volatility, and an appropriate risk-free rate. During the years ended June 30, 2015, 2014 and 2013, the Company recognized $156.4 million, $253.3 million and $104.9 million, respectively, of stock-based compensation expense related to vesting of CII common units. As of June 30, 2015, the unrecognized compensation associated with unvested CII common units was $70.2 million. CII Preferred Units CII has issued preferred units of CII to certain of the Company’s executives and independent directors as compensation. The terms of these preferred unit awards require the Company to record the awards as equity awards. The Company estimates the fair value of these equity awards on the grant date and recognizes the related expense over the vesting period of the awards. As these awards have been issued by CII to employees and directors of the Company as compensation, the related expense has been recorded by the Company in the accompanying consolidated statements of operations. The Company recognized stock-based compensation expense and a related increase to the Company’s member’s interest of $0.4 million, $0.4 million and $0.9 million for the years ended June 30, 2015, 2014, and 2013, respectively. In connection with the non-liquidating distribution by CII approved on October 9, 2014, the Company’s CEO and independent directors with vested CII preferred units received 256,265 shares of ZGH’s common stock equal to the underlying value of their vested CII preferred units. A total of 29,555 shares of ZGH’s common stock associated with unvested CII preferred units have or will be distributed subsequent to the IPO date. Performance Incentive Compensation Plan (“PCIP”) During October 2014, the Company adopted the 2014 Performance Compensation Incentive Plan (“PCIP”). The PCIP includes incentive cash compensation (ICC) and equity (in the form of restricted stock units or “RSUs”). Grants under the PCIP RSU plans are made quarterly for all participants. The PCIP was effective on October 16, 2014 and will remain in effect for a period of 10 years (or through October 16, 2024) unless it is earlier terminated by the Company’s Board of Directors. The PCIP has two components: Part A and Part B. Part A Under Part A of the PCIP, all full-time employees, including the Company’s executives, are eligible to earn quarterly awards of RSUs. Each participant in Part A of the PCIP will have a RSU annual award target value, which will be allocated to each fiscal quarter. The final Part A value awarded to a participant for any fiscal quarter is determined by the Compensation Committee subsequent to the end of the respective performance period taking into account the Company’s measured value creation for the quarter, as well as such other subjective factors that it deems relevant (including group and individual level performance factors). The number of Part A RSUs granted will be calculated based on the final award value determined by the Compensation Committee divided by the average closing price of ZGH’s common stock over the last ten trading days of the respective performance period. Part A RSUs will vest assuming continuous employment fifteen months subsequent to the end of the performance period. Upon vesting, the RSUs convert to an equal number of shares of ZGH’s common stock. During the years ended June 30, 2015 the Company recognized $12.6 million of compensation expense associated with the vested portion of the Part A awards. The June 30, 2015 quarterly award is recorded as a liability totaling $1.9 million as of June 30, 2015, as the awards represent an obligation denominated in a fixed dollar amount to be settled in a variable number of shares during the quarter ending September 30, 2015. Upon the issuance of the RSUs, the liability is re-measured and then reclassified to member’s interest, with a corresponding charge (or credit) to stock based compensation expense. The value of the remaining unvested RSUs is expensed ratably through the vesting date. At June 30, 2015, the remaining unrecognized compensation cost to be expensed over the remaining vesting period for Part A awards is $12.6 million. Part B Under Part B of the PCIP, participants, who include members of the Company’s senior management team, are awarded quarterly grants of RSUs. The number of the RSUs earned by the participants is based on ZGH’s stock price performance over a four fiscal quarter measurement period and vest, assuming continuous employment at the end of the measurement period. The existence of a vesting provision that is associated with the performance of ZGH’s stock price is a market condition, which affects the determination of the grant date fair value. Upon vesting, RSUs convert to an equal number of shares of ZGH’s common stock. The table below reflects the total Part B RSUs granted during each period presented, the maximum eligible shares of ZGH’s stock that the respective Part B RSU grant could be converted into shares of ZGH’s common stock and the grant date fair value per Part B RSU (in millions): During the three months ended June March 31, 2015 December 31, 2014 Part B RSUs granted 316,353 359,658 575,660 Maximum eligible shares of the Company's stock 1,490,023 1,381,086 2,210,534 Grant date fair value per Part B RSU $ 27.10 $ 24.36 $ 63.12 During years ended June 30, 2015, the Company recognized stock-based compensation expense of $31.3 million related to Part B awards. The grant date fair value of Part B RSU grants is estimated utilizing a Monte Carlo simulation. This simulation estimates the ten-day average closing stock price ending on the vesting date, the stock price performance over the performance period, and the number of common shares to be issued at the vesting date. Various assumptions are utilized in the valuation method, including the target stock price performance ranges and respective share payout percentages, the Company’s historical stock price performance and volatility, peer companies’ historical volatility and an appropriate risk-free rate. The aggregate future value of the grant under each simulation is calculated using the estimated per share value of the common stock at the end of the vesting period multiplied by the number of common shares projected to be granted at the vesting date. The present value of the aggregate grant is then calculated under each of the simulations, resulting in a distribution of potential present values. The fair value of the grant is then calculated based on the average of the potential present values. The remaining unrecognized compensation cost associated with Part B RSU grants is $21.9 million at June 30, 2015.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	(13) FAIR VALUE MEASUREMENTS The Company’s financial instruments consist of cash and cash equivalents, restricted cash, trade receivables, accounts payable, interest rate swaps, and long-term debt. The carrying values of cash and cash equivalents, restricted cash, trade receivables, and accounts payable approximated their fair values at June 30, 2015 and 2014, due to the short maturity of these instruments. The carrying value of the Company’s Notes, excluding debt issuance costs, reflects the original amounts borrowed, inclusive of unamortized premium was $2,112.7 million and $1,250.0 million as of June 30, 2015 and 2014, respectively. Based on market interest rates for debt of similar terms and average maturities, the fair value of the Company's Notes as of June 30, 2015 and 2014 was estimated to be $2,109.3 million and $1,294.8 million, respectively. The Company’s fair value estimates associated with its Note obligations were derived utilizing Level 2 inputs – quoted prices for similar instruments in active markets. The carrying value of the Company’s Term Loan Facility, excluding debt issuance costs, reflects the original amounts borrowed, net of the unamortized discounts was $1,627.0 million and $1,990.2 million as of June 30, 2015 and 2014, respectively. The Company’s Term Loan Facility accrues interest at variable rates based upon the one month, three month or six month LIBOR (with a LIBOR floor of 1.00%) plus a spread of 2.75%. Since management does not believe that the Company’s credit quality has changed significantly since the date when the Term Loan Facility last amended on May 6, 2015, its carrying amount approximates fair value. Excluding any offsetting effect of the Company’s interest rate swaps, a hypothetical increase in the applicable interest rate on the Company’s term loan of one percentage point above the LIBOR floor would increase the Company’s annual interest expense by approximately The Company’s interest rate swaps are valued using discounted cash flow techniques that use observable market inputs, such as LIBOR-based yield curves, forward rates, and credit ratings. Changes in the fair value of the interest rate swaps of As of June 30, 2015 and 2014, there is no balance currently outstanding under the Company's Revolver. Financial instruments measured at fair value on a recurring basis are summarized below (in millions): Level June 30, 2015 June 30, 2014 Liabilities Recorded at Fair Value in the Financial Statements: Interest rate swap Level 2 $ 4.1 $ 2.0 Prior to the deemed modification of the Company’s stock-based compensation arrangements (See Note 12 – Stock-based Compensation),

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments And Contingencies	(14) COMMITMENTS AND CONTINGENCIES Capital Leases Future contractual payments under the terms of the Company’s capital lease obligations were as follows (in millions): Year Ended June 30, 2016 $ 6.4 2017 7.0 2018 5.6 2019 5.0 2020 3.8 Thereafter 17.3 Total minimum lease payments 45.1 Less amounts representing interest (12.4 ) Less current portion (4.4 ) Capital lease obligations, non-current $ 28.3 Operating Leases The Company leases office space, warehouse space, network assets, switching and transport sites, points of presence and equipment under non-cancelable operating leases. Lease expense was $125.3 million, $90.1 million, and $87.2 million for the years ended June 30, 2015, 2014 and 2013, respectively. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases. When the straight-line expense recorded exceeds the cash outflows during the respective period, the Company records a deferred lease obligation on the consolidated balance sheets and amortizes the deferred rent over the terms of the respective leases. Minimum contractual lease payments due under the Company’s long-term operating leases are as follows (in millions): Year Ended June 30, 2016 $ 119.3 2017 86.9 2018 75.4 2019 62.7 2020 48.9 Thereafter 280.7 $ 673.9 Lease Termination Costs In connection with integration activities associated with acquisitions completed during Fiscal 2012 and 2013, the Company completed an analysis of existing and acquired facilities leases and determined that certain facilities under lease would not be used by the Company in the future. During the fourth quarter of 2013, the Company recorded a charge for lease termination costs totaling $10.4 million related to exit activities initiated for unutilized space associated with leased office and technical facilities, which was partially offset by a benefit related to the release of associated rent escalation accrual in the amount of $0.2 million. The net $10.2 million charge has been included in operating costs and selling, general and administrative expenses for Fiscal 2013. As of June 30, 2015 and 2014, the remaining lease termination obligation associated with these facilities was $6.3 million and $8.1 million, respectively, which is recorded net of anticipated sublease income. The Company periodically re-evaluates its assumptions used to estimate this obligation and may record adjustments prospectively as facts or circumstances change related to the utilized space associated with leased facilities. Purchase Commitments At June 30, 2015, the Company was contractually committed for $226.4 million of capital expenditures for construction materials and purchases of property and equipment. A majority of these purchase commitments are expected to be satisfied in the next twelve months. These purchase commitments are primarily success based; that is, the Company has executed customer contracts that support the future capital expenditures. Outstanding Letters of Credit As of June 30, 2015, the Company had $9.2 million in outstanding letters of credit, which were primarily entered into in connection with various lease agreements. Contingencies In the normal course of business, the Company is party to various outstanding legal proceedings, asserted and unasserted claims, and carrier disputes. In the opinion of management, the ultimate disposition of these matters, both asserted and unasserted, will not have a material adverse effect on the Company’s financial condition, results of operations, or cash flows.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	(15) RELATED-PARTY TRANSACTIONS The Company has ongoing contractual relationships with Onvoy, LLC and its subsidiaries (“OVS”). OVS is wholly owned by CII and provides voice and managed services. The Company provides OVS and its subsidiaries with bandwidth capacity, and OVS provides the Company and its subsidiaries with voice services. The contractual relationships are based on agreements that were entered into at estimated market rates. The following table represents the revenue and expense transactions the Company recorded with OVS (in millions): Year Ended June 30, 2015 2014 2013 Revenues $ 6.9 $ 7.0 6.6 Operating costs $ 1.0 $ 1.6 1.5 As of June 30, 2015 and June 30, 2014, the Company had a balance due from OVS in the amount of $0.6 million and $0.1 million, respectively. As of June 30, 2015, the Company had a balance due to ZGH of $1.3 million related to certain expenses of the Company that were paid by ZGH. As discussed in Note 11 – Equity Dan Caruso, the Company’s Chief Executive Officer and Chairman of the Board is a party to an aircraft charter (or membership) agreement through his affiliate, Bear Equity LLC, for business and personal travel. Under the terms of the charter agreement, all fees for the use of the aircraft are effectively variable in nature. For his business travel on behalf of the Company, Mr. Caruso is reimbursed for his use of the aircraft subject to quarterly and annual maximum reimbursement thresholds approved by the Company's Nominating and Governance Committee. During the years ended June 30, 2015 and 2014, respectively, the Company reimbursed Mr. Caruso $0.7 million and $0.1 million for his business use of the aircraft. On June 28, 2012, Matt Erickson, the President of Zayo Physical Infrastructure, purchased $0.6 million in aggregate principal amount of the Company’s 10.125% 2020 Unsecured Notes at the offering price for such notes. Mr. Erickson qualifies as an “accredited investor” (as defined in Rule 501 under the Securities Act), and this purchase was on terms available to other investors. On December 15, 2015, approximately $0.2 million of Mr. Erickson’s notes were redeemed as part of the pro rata redemption of the 2020 Unsecured Notes following the ZGH initial public offering, and as of June 30, 2015, the principal amount of notes held by Mr. Erickson was $0.4 million.

Segment Reporting

Segment Reporting	12 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Reporting	(16) SEGMENT REPORTING The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s individual strategic product groups (“SPGs”) are organized into three operating segments based on the similarities of business activities: Physical Infrastructure, Cloud and Connectivity and Other. The Company’s operating segments are also its reporting segments. The Physical Infrastructure operating segment is comprised of the following SPGs: Dark Fiber, Mobile Infrastructure, and Zayo Colocation (“zColo”). The Cloud and Connectivity operating segment is comprised of the following SPGs: Wavelengths, Ethernet, IP, SONET and Cloud. SPGs report directly to the segment managers who are responsible for the operations and financial results for the Physical Infrastructure, Cloud and Connectivity and Other reportable segments. The segment managers for each of the Physical Infrastructure, Cloud and Connectivity and Other operating segments report directly to the CODM, and it is the financial results of those segments that are evaluated and drive the resource allocation decisions. The Company’s three operating segments are described below: Physical Infrastructure . Through the Physical Infrastructure segment, the Company provides raw bandwidth infrastructure to customers that require more control of their internal networks. These services include dark fiber, mobile infrastructure (fiber-to-the-tower and small cell), and colocation and interconnection. Dark fiber is a physically separate and secure, private platform for dedicated bandwidth. The Company leases dark fiber pairs (usually 2 to 12 total fibers) to its customers, who “light” the fiber using their own optronics. The Company’s mobile infrastructure services provide direct fiber connections to cell towers, small cells, hub sites, and mobile switching centers. The Company’s datacenters offer colocation and interconnection services to its customers, who then house and power the Company’s computing and networking equipment for the purpose of aggregating and distributing data, voice, Internet, and video traffic. Physical Infrastructure customers include carriers and other communication service providers, Internet service providers, wireless service providers, major media and content companies, large enterprises, and other companies that have the expertise to run their own fiber optic networks or require interconnected technical space. The contract terms in the Physical Infrastructure segment generally tend to range from three to twenty years. Cloud and Connectivity . The Cloud and Connectivity segment provides bandwidth infrastructure solutions over the Company’s metro, regional, and long-haul fiber networks where it uses optronics to light the fiber and the Company’s customers pay for access based on the amount and type of bandwidth they purchase. The Company’s services within this segment include wavelength, Ethernet, IP, SONET, and cloud services with capacity ranging from 1.54Mb to 100G. The Company targets customers who require a minimum of 10G of bandwidth across their networks. Cloud and Connectivity customers include carriers, financial services companies, healthcare, government institutions, education institutions and other enterprises. The contract terms in this segment tend to range from two to five years. Other . The Other segment is primarily comprised of ZPS. ZPS provides network and technical resources to customers in designing, acquiring and maintaining their networks. Services are typically provided for a term of one year for a fixed recurring monthly fee in the case of network and on an hourly basis for technical resources (usage revenue). Revenues for all of the Company’s products are included in one of the Company’s three segments. The results of operations for each segment include an allocation of certain indirect costs and corporate related costs, including overhead and third party-financed debt. The allocation is based on a percentage that represents management’s estimate of the relative burden each segment bears of indirect and corporate costs. Management has evaluated the allocation methods utilized to allocate these costs and determined they are systematic and rational. Identifiable assets for each reportable segment are reconciled to total consolidated assets including unallocated corporate assets and intersegment eliminations. Unallocated corporate assets consist primarily of cash and deferred taxes. Segment Adjusted EBITDA Segment Adjusted EBITDA is the primary measure used by the Company’s CODM to evaluate segment operating performance. The Company defines Segment Adjusted EBITDA as earnings from continuing operations before interest, income taxes, depreciation and amortization (“EBITDA”) adjusted to exclude acquisition or disposal-related transaction costs, losses on extinguishment of debt, stock-based compensation, unrealized foreign currency gains (losses) on intercompany loans, and non-cash income (loss) on equity and cost method investments. The Company uses Segment Adjusted EBITDA to evaluate operating performance, and this financial measure is among the primary measures used by management for planning and forecasting of future periods. The Company believes that the presentation of Segment Adjusted EBITDA is relevant and useful for investors because it allows investors to view results in a manner similar to the method used by management and facilitates comparison of the Company’s results with the results of other companies that have different financing and capital structures. Segment Adjusted EBITDA results, along with other quantitative and qualitative information, are also utilized by the Company and its Compensation Committee for purposes of determining bonus payouts to employees. Segment Adjusted EBITDA has limitations as an analytical tool and should not be considered in isolation from, or as a substitute for, analysis of the Company’s results from operations and operating cash flows as reported under GAAP. For example, Segment Adjusted EBITDA: • does not reflect capital expenditures, or future requirements for capital and major maintenance expenditures or contractual commitments; • does not reflect changes in, or cash requirements for, working capital needs; • does not reflect the significant interest expense, or the cash requirements necessary to service the interest payments, on the Company’s debt; and • does not reflect cash required to pay income taxes. For the year ended June 30, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 662.4 $ 661.5 $ 23.2 $ — $ 1,347.1 Segment Adjusted EBITDA 432.8 344.5 5.3 — 782.6 Total assets 3,694.3 1,976.0 35.0 388.7 6,094.0 Capital expenditures 328.4 201.8 0.2 — 530.4 For the year ended June 30, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 495.4 $ 606.2 $ 28.1 $ — $ 1,129.7 Segment Adjusted EBITDA 325.6 326.7 8.0 — 660.3 Total assets 2,872.5 1,739.1 43.1 326.2 4,980.9 Capital expenditures 209.2 151.6 — — 360.8 For the year ended June 30, 2013 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 413.0 $ 570.5 $ 27.8 $ (0.3 ) $ 1,011.0 Segment Adjusted EBITDA 276.1 278.3 6.2 (0.1 ) 560.5 Total assets (1) 2,311.5 1,685.5 32.4 122.7 4,152.1 Capital expenditures, net of stimulus grant reimbursements 180.3 143.0 — — 323.3 Reconciliation from Total Segment Adjusted EBITDA to net loss from operations For the year ended June 30, 2015 2014 2013 (in millions) Total Segment Adjusted EBITDA $ 782.6 $ 660.3 $ 560.5 Interest expense (214.0 ) (203.5 ) (202.5 ) Depreciation and amortization expense (406.2 ) (338.2 ) (324.5 ) Transaction costs (5.9 ) (4.5 ) (14.2 ) Stock-based compensation (200.7 ) (253.7 ) (105.8 ) Loss on extinguishment of debt (94.3 ) (1.9 ) (77.3 ) Unrealized foreign currency gain/(loss) (24.4 ) 4.7 0.1 Non-cash loss on investments (0.9 ) — — Net loss from continuing operations before provision for income taxes $ (163.8 ) $ (136.8 ) $ (163.7 ) The following is a summary of geographical information (in millions): For the year ended June 30, 2015 2014 2013 Revenue from external customers: United States $ 1,193.5 $ 1,059.3 $ 953.1 United Kingdom 119.0 70.3 57.5 Japan — 0.1 0.4 France 34.6 — — Total Revenue $ 1,347.1 $ 1,129.7 $ 1,011.0 Long-lived assets: United States $ 3,848.0 $ 3,140.2 2,995.3 United Kingdom 405.3 429.9 120.2 Japan 0.3 0.3 — France 48.7 — — Total Long-lived assets $ 4,302.3 $ 3,570.4 $ 3,115.5 The Company includes all non-current assets, except for goodwill in its long-lived assets. On July 2, 2014, the Company acquired Neo. The Company reported the operating results of Neo in the “Other Segment” in its previously filed Quarterly Reports on Form 10-Q during Fiscal 2015. During the quarter ended June 30, 2015, the Company implemented certain changes to its SPG structure which resulted in the operating results and assets of the acquired Neo entity to be further distributed amongst the Physical Infrastructure and Cloud and Connectivity reporting segments. The tables below reflect a recast of previously reported quarterly segment financial information which gives effect to this change. Additionally, total assets in the table below have been adjusted to exclude debt issuance costs (see Note 8 –Long Term Debt For the three months ended September 30, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 154.0 $ 160.5 $ 6.1 $ — $ 320.6 Segment Adjusted EBITDA 98.4 83.2 1.4 — 183.0 Total assets 2,891.8 1,756.5 40.5 284.1 4,972.9 Capital expenditures, net of stimulus grant reimbursements 69.0 46.3 — — 115.3 For the three months ended December 31, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 156.4 $ 162.0 $ 5.5 $ — $ 323.9 Segment Adjusted EBITDA 102.9 85.7 1.1 — 189.7 Total assets 2,900.5 1,768.0 36.1 284.2 4,988.8 Capital expenditures, net of stimulus grant reimbursements 77.0 52.5 — — 129.5 For the six months ended December 31, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 310.4 $ 322.6 $ 11.5 $ — $ 644.5 Segment Adjusted EBITDA 201.3 168.9 2.5 — 372.7 Capital expenditures, net of stimulus grant reimbursements 146.0 98.8 — — 244.8 For the three months ended March 31, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 168.2 $ 166.8 $ 5.7 $ — $ 340.7 Segment Adjusted EBITDA 110.5 87.3 1.2 — 199.0 Total assets 3,615.5 1,946.3 38.5 285.9 5,886.2 Capital expenditures, net of stimulus grant reimbursements 83.2 46.9 — — 130.1 For the nine months ended March 31, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 478.6 $ 489.4 $ 17.2 $ — $ 985.2 Segment Adjusted EBITDA 311.7 256.2 3.8 — 571.7 Capital expenditures, net of stimulus grant reimbursements 229.2 145.7 — — 374.9

Condensed Consolidating Financi

Condensed Consolidating Financial Information	12 Months Ended
	Jun. 30, 2015
Condensed Consolidating Financial Information [Abstract]
Condensed Consolidating Financial Information	(17) Condensed Consolidating Financial Information As discussed Note 8 – Long-Term Debt The accompanying condensed consolidating financial information has been prepared and is presented to display the components of the Company’s balance sheets, statements of operations and statements of cash flows in a manner that allows an existing or future holder of the Company’s Notes to review and analyze the current financial position and recent operating results of the legal subsidiaries that guarantee the Company’s debt obligations. The operating activities of the separate legal entities included in the Company’s consolidated financial statements are interdependent. The accompanying condensed consolidating financial information presents the results of operations, financial position and cash flows of each legal entity. Zayo Group and its guarantors provide services to each other during the normal course of business. These transactions are eliminated in the consolidated results of operations of the Company. Activity related to income taxes is included at the issuer, or Zayo Group level, and the Company's non-guarantor subsidiaries and is not allocated to the Company's guarantor subsidiaries in the condensed consolidated financial information presented below. Condensed Consolidating Balance Sheets Year Ended June 30, 2015 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Assets Current assets Cash and cash equivalents $ 274.3 $ 4.7 $ 29.0 $ — 308.0 Trade receivables, net of allowance 54.7 4.6 28.7 — 88.0 Due from related parties (1.3 ) 0.4 2.9 (1.4 ) 0.6 Prepaid expenses 25.8 4.4 7.1 — 37.3 Deferred income taxes, net 128.5 — 1.0 — 129.5 Other assets 3.6 — 0.3 — 3.9 Total current assets 485.6 14.1 69.0 (1.4 ) 567.3 Property and equipment, net 2,622.9 335.5 340.8 — 3,299.2 Intangible assets, net 605.8 239.5 103.0 — 948.3 Goodwill 762.2 281.0 181.2 — 1,224.4 Other assets 36.2 8.3 10.3 — 54.8 Related party receivable 304.8 — — (304.8 ) — Investment in subsidiary 1,050.8 — — (1,050.8 ) — Total assets $ 5,868.3 $ 878.4 $ 704.3 $ (1,357.0 ) $ 6,094.0 Liabilities and member's equity Current liabilities Current portion of long-term debt $ 16.5 $ — $ — $ — 16.5 Accounts payable 26.6 4.0 9.4 — 40.0 Accrued liabilities 125.6 20.6 36.2 — 182.4 Accrued interest 57.2 — — — 57.2 Capital lease obligations, current 2.0 1.6 0.8 — 4.4 Due to related parties 1.7 — — (1.4 ) 1.3 Deferred revenue, current 73.2 2.8 10.6 — 86.6 Total current liabilities 302.8 29.0 58.0 (1.4 ) 388.4 Long-term debt, non-current 3,652.2 — — — 3,652.2 Related party debt, long-term — — 304.8 (304.8 ) — Capital lease obligation, non-current 5.6 18.6 4.1 — 28.3 Deferred revenue, non-current 559.4 4.6 48.7 — 612.7 Stock-based compensation liability 1.5 0.1 0.3 — 1.9 Deferred income taxes, net 139.2 — 50.5 — 189.7 Other long-term liabilities 13.5 10.5 2.7 — 26.7 Total liabilities 4,674.2 62.8 469.1 (306.2 ) 4,899.9 Member's equity Member's interest 1,730.1 778.1 251.2 (1,060.3 ) 1,699.1 Accumulated other comprehensive (loss)/income — — (7.9 ) — (7.9 ) Accumulated deficit (536.0 ) 37.5 (8.1 ) — (497.1 ) Total member's equity 1,194.1 815.6 235.2 (1,050.8 ) 1,194.1 Total liabilities and member's equity $ 5,868.3 $ 878.4 $ 704.3 $ (1,357.0 ) $ 6,094.0 Condensed Consolidating Balance Sheets Year Ended June 30, 2014 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Assets Current assets Cash and cash equivalents $ 256.0 $ 5.8 $ 35.6 $ — 297.4 Trade receivables, net of allowance 33.6 8.2 15.4 — 57.2 Due from related parties 0.3 — 0.6 — 0.9 Prepaid expenses 18.7 0.9 5.3 — 24.9 Deferred income taxes, net 156.0 3.5 1.5 — 161.0 Other assets 1.9 — 0.5 — 2.4 Total current assets 466.5 18.4 58.9 — 543.8 Property and equipment, net 2,389.3 109.3 323.8 — 2,822.4 Intangible assets, net 563.7 51.1 95.5 — 710.3 Goodwill 683.5 38.0 145.2 — 866.7 Other assets 23.4 3.5 10.8 — 37.7 Related party receivable 267.8 — — (267.8 ) — Investment in subsidiary 332.1 — — (332.1 ) — Total assets $ 4,726.3 $ 220.3 $ 634.2 $ (599.9 ) $ 4,980.9 Liabilities and member's equity Current liabilities Current portion of long-term debt $ 20.5 $ — $ — $ — 20.5 Accounts payable 20.4 4.3 2.0 — 26.7 Accrued liabilities 125.0 21.0 26.3 — 172.3 Accrued interest 57.1 — — — 57.1 Capital lease obligations, current 1.5 0.9 — — 2.4 Due to related parties (0.7 ) — 0.7 — — Deferred revenue, current 56.7 1.6 17.1 — 75.4 Total current liabilities 280.5 27.8 46.1 — 354.4 Long-term debt, non-current 3,130.3 — — — 3,130.3 Related party debt, long-term — — 267.8 (267.8 ) — Capital lease obligation, non-current 5.6 18.4 1.7 — 25.7 Deferred revenue, non-current 459.5 8.6 33.4 — 501.5 Stock-based compensation liability 343.8 23.3 25.3 — 392.4 Deferred income taxes, net 93.0 — 45.3 — 153.0 Other long-term liabilities 12.3 9.8 0.2 — 22.3 Total liabilities 4,325.0 102.6 419.8 (267.8 ) 4,579.6 Member's equity Member's interest 782.2 73.8 205.0 (332.1 ) 728.9 Accumulated other comprehensive (loss)/income — — 14.4 — 14.4 Accumulated deficit (380.9 ) 43.9 (5.0 ) — (342.0 ) Total member's equity 401.3 117.7 214.4 (332.1 ) 401.3 Total liabilities and member's equity $ 4,726.3 $ 220.3 $ 634.2 $ (599.9 ) $ 4,980.9 Condensed Consolidating Statements of Operations Year Ended June 30, 2015 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 1,040.1 $ 151.6 $ 155.4 $ — $ 1,347.1 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 313.8 54.4 45.3 — 413.5 Selling, general and administrative expenses (including stock-based compensation) 266.4 38.9 52.8 — 358.1 Depreciation and amortization 321.7 42.7 41.8 — 406.2 Total operating costs and expenses 901.9 136.0 139.9 — 1,177.8 Operating income 138.2 15.6 15.5 — 169.3 Other expenses Interest expense (177.0 ) (20.3 ) (16.7 ) — (214.0 ) Loss on extinguishment of debt (91.8 ) (1.7 ) (0.8 ) — (94.3 ) Foreign currency (loss)/gain on intercompany loans (23.2 ) — (1.2 ) — (24.4 ) Other income, net (0.4 ) — — — (0.4 ) Equity in net earnings of subsidiaries (9.5 ) — — 9.5 — Total other expense, net (301.9 ) (22.0 ) (18.7 ) 9.5 (333.1 ) (Loss)/earnings before provision for income taxes (163.7 ) (6.4 ) (3.2 ) 9.5 (163.8 ) (Benefit)/provision for income taxes (8.6 ) — (0.1 ) — (8.7 ) Net (loss)/earnings $ (155.1 ) $ (6.4 ) $ (3.1 ) $ 9.5 $ (155.1 ) Condensed Consolidating Statements of Operations Year Ended June 30, 2014 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 956.5 $ 102.8 $ 70.4 $ — $ 1,129.7 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 290.1 45.5 7.7 — 343.3 Selling, general and administrative expenses (including stock-based compensation) 327.3 28.3 29.0 — 384.6 Depreciation and amortization 307.6 13.8 16.8 — 338.2 Total operating costs and expenses 925.0 87.6 53.5 — 1,066.1 Operating income 31.5 15.2 16.9 — 63.6 Other expenses Interest expense (201.1 ) — (2.4 ) — (203.5 ) Loss on extinguishment of debt (1.9 ) — — — (1.9 ) Foreign currency (loss)/gain on intercompany loans 3.5 — 1.2 — 4.7 Other income, net 0.3 — — — 0.3 Equity in net earnings of subsidiaries 28.2 — — (28.2 ) — Total other expense, net (171.0 ) — (1.2 ) (28.2 ) (200.4 ) (Loss)/earnings before provision for income taxes (139.5 ) 15.2 15.7 (28.2 ) (136.8 ) (Benefit)/provision for income taxes 37.6 - 2.7 — 40.3 Net (loss)/earnings $ (177.1 ) $ 15.2 $ 13.0 $ (28.2 ) $ (177.1 ) Condensed Consolidating Statements of Operations Year Ended June 30, 2013 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 876.4 $ 85.4 $ 57.9 $ (8.7 ) $ 1,011.0 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 255.5 50.4 16.9 (8.7 ) 314.1 Selling, general and administrative expenses (including stock-based compensation) 229.5 9.4 17.8 — 256.7 Depreciation and amortization 301.4 9.8 13.3 — 324.5 Total operating costs and expenses 786.4 69.6 48.0 (8.7 ) 895.3 Operating income 90.0 15.8 9.9 — 115.7 Other expenses Interest expense (202.1 ) — (0.4 ) — (202.5 ) Loss on extinguishment of debt (77.3 ) — — — (77.3 ) Foreign currency (loss)/gain on intercompany loans 0.1 — — — 0.1 Other income, net 0.2 — 0.1 — 0.3 Equity in net earnings of subsidiaries 20.7 — — (20.7 ) — Total other expense, net (258.4 ) — (0.3 ) (20.7 ) (279.4 ) (Loss)/earnings before provision for income taxes (168.4 ) 15.8 9.6 (20.7 ) (163.7 ) (Benefit)/provision for income taxes (26.5 ) — 4.7 — (21.8 ) Net (loss)/earnings $ (141.9 ) $ 15.8 $ 4.9 $ (20.7 ) $ (141.9 ) Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2015 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 489.3 $ 55.7 62.0 $ 607.0 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (436.8 ) (47.8 ) (45.8 ) (530.4 ) Acquisitions, net of cash acquired (113.5 ) (668.3 ) (73.9 ) (855.7 ) Net cash used in investing activities (550.3 ) (716.1 ) (119.7 ) (1,386.1 ) Cash flows from financing activities: Proceeds from debt 1,747.2 — 40.1 1,787.3 Proceeds from equity offerings and contributions (290.9 ) 660.7 15.2 385.0 Direct costs associated with equity offerings - — — - Principal payments on long-term debt (1,288.5 ) — — (1,288.5 ) Payment of early redemption fees on debt extinguished (62.6 ) — — (62.6 ) Principal repayments on capital lease obligations (1.7 ) (1.4 ) (0.4 ) (3.5 ) Payment of debt issuance costs (24.2 ) — — (24.2 ) Net cash provided by financing activities 79.3 659.3 54.9 793.5 Effect of changes in foreign exchange rates on cash — — (3.8 ) (3.8 ) Net (decrease)/increase in cash and cash equivalents 18.3 (1.1 ) (2.8 ) 14.4 Cash and cash equivalents, beginning of period 256.0 5.8 35.6 297.4 Cash and cash equivalents, end of period $ 274.3 $ 4.7 $ 29.0 $ 308.0 Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2014 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 485.5 43.2 33.3 $ 562.0 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (316.6 ) (28.2 ) (16.0 ) (360.8 ) Acquisitions, net of cash acquired (83.2 ) (17.8 ) (292.3 ) (393.3 ) Net cash used in investing activities (399.8 ) (46.0 ) (308.3 ) (754.1 ) Cash flows from financing activities: Proceeds from debt 423.6 — — 423.6 Proceeds from revolving credit facility 195.0 — — 195.0 Proceeds from equity offerings and contributions 11.2 (5.6 ) — 5.6 Distribution to parent (1.2 ) — — (1.2 ) Dividends received/(paid) (70.8 ) 15.8 55.0 — Principal payments on long-term debt (18.0 ) — — (18.0 ) Principal repayments on capital lease obligations (2.1 ) (5.8 ) — (7.9 ) Payment of)/receipt from intercompany loans (251.1 ) — 251.1 — Payments on revolving credit facility (195.0 ) — — (195.0 ) Payment of debt issuance costs (4.9 ) — — (4.9 ) Net cash provided by financing activities 86.7 4.4 306.1 397.2 Effect of changes in foreign exchange rates on cash — — 1.0 1.0 Net (decrease)/increase in cash and cash equivalents 172.4 1.6 31.1 205.1 Cash and cash equivalents, beginning of period 83.6 4.2 3.5 91.3 Cash and cash equivalents, end of period $ 256.0 $ 5.8 $ 35.6 $ 297.4 Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2013 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 359.3 $ 31.8 $ 13.6 $ 404.7 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (299.8 ) (14.1 ) (9.4 ) (323.3 ) Acquisitions, net of cash acquired (2,489.0 ) 0.4 7.9 (2,480.7 ) Net cash used in investing activities (2,788.8 ) (13.7 ) (1.5 ) (2,804.0 ) Cash flows from financing activities: Proceeds from debt 3,184.4 4.9 — 3,189.3 Proceeds from equity offerings and contributions 344.0 — — 344.0 Dividends received/(paid) 18.6 (18.6 ) — — Principal payments on long-term debt (1,058.6 ) — — (1,058.6 ) Payment of early redemption fees on debt extinguished (72.1 ) — — (72.1 ) Principal repayments on capital lease obligations (1.8 ) (0.1 ) — (1.9 ) Payment of)/receipt from intercompany loans 8.3 — (8.3 ) — Payment of debt issuance costs (83.1 ) — — (83.1 ) Changes in restricted cash, net 22.6 — — 22.6 Net cash provided by financing activities 2,362.3 (13.8 ) (8.3 ) 2,340.2 Effect of changes in foreign exchange rates on cash 0.1 (0.1 ) (0.3 ) (0.3 ) Net (decrease)/increase in cash and cash equivalents (67.2 ) 4.3 3.8 (59.1 ) Cash and cash equivalents, beginning of period 150.7 — — 150.7 Cash and cash equivalents, end of period $ 83.6 $ 4.2 $ 3.5 $ 91.3

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	(18) QUARTERLY FINANCIAL DATA (UNAUDITED) The following table presents the unaudited quarterly results for the year ended June 30, 2015 (in millions): 2015 Quarter Ended (1) September December 31 March 31 (3) (4) June 30 Total Revenue $ 320.6 $ 323.9 $ 340.7 $ 361.9 $ 1,347.1 Operating costs and expenses Operating costs (excluding depreciation and amortization and including stock-based compensation) 107.3 97.8 100.9 107.5 413.5 Selling, general and administrative expenses (including stock-based compensation) (2) 156.6 32.1 83.0 86.4 358.1 Depreciation and amortization 96.0 96.9 100.1 113.2 406.2 Total operating costs and expenses 359.9 226.8 284.0 307.1 1,177.8 Operating income (39.3 ) 97.1 56.7 54.8 169.3 Other expenses Interest expense (46.9 ) (53.4 ) (60.7 ) (53.0 ) (214.0 ) Loss on extinguishment of debt (5) — (30.9 ) (54.9 ) (8.5 ) (94.3 ) Foreign currency (loss)/gain on intercompany loans (14.7 ) (13.3 ) (13.2 ) 16.8 (24.4 ) Other (expense)/income, net — (0.1 ) — (0.3 ) (0.4 ) Total other expenses, net (61.6 ) (97.7 ) (128.8 ) (45.0 ) (333.1 ) (Loss)/earnings from operations before income taxes (100.9 ) (0.6 ) (72.1 ) 9.8 (163.8 ) (Benefit)/provision for income taxes 9.4 (4.3 ) (18.4 ) 4.6 (8.7 ) Net (loss)/earnings $ (110.3 ) $ 3.7 $ (53.7 ) $ 5.2 $ (155.1 ) (1) The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo. (2) The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation (3) The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek. (4) The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys. (5) The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt The following table presents the unaudited quarterly results for the year ended June 30, 2014 (in millions): 2014 Quarter Ended (1) September 30 December 31 (2) (3) March 31 (4) June 30 (5) Total Revenue $ 269.7 $ 278.7 $ 283.2 $ 298.1 $ 1,129.7 Operating costs and expenses Operating costs (excluding depreciation and amortization and including stock-based compensation) 79.7 85.9 84.9 92.8 343.3 Selling, general and administrative expenses (including stock-based compensation) 76.4 87.0 96.6 124.6 384.6 Depreciation and amortization 81.0 81.7 84.2 91.3 338.2 Total operating costs and expenses 237.1 254.6 265.7 308.7 1,066.1 Operating income 32.6 24.1 17.5 (10.6 ) 63.6 Other expenses Interest expense (6) (51.5 ) (50.3 ) (49.1 ) (52.6 ) (203.5 ) Loss on extinguishment of debt (7) — (1.9 ) — — (1.9 ) Foreign currency gain on intercompany loans 0.6 0.2 0.1 3.8 4.7 Other income, net 0.1 0.3 — (0.1 ) 0.3 Total other expenses, net (50.8 ) (51.7 ) (49.0 ) (48.9 ) (200.4 ) Loss from operations before income taxes (18.2 ) (27.6 ) (31.5 ) (59.5 ) (136.8 ) Provision for income taxes 9.3 8.4 12.1 10.5 40.3 Net loss $ (27.5 ) $ (36.0 ) $ (43.6 ) $ (70.0 ) $ (177.1 ) (1) The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink. (2) The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access. (3) The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink. (4) The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange. (5) The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo. (6) The Company realized an increase in interest expense during the second and fourth quarters of 2014 due to financing transactions completed to increase its borrowings under its term loan facility. See Note 8— Long-Term Debt. (7) The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

Basis of Presentation and Sig26

Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	a. Basis of Presentation The accompanying consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) Our fiscal year ends June 30 each year, and we refer to the fiscal year ended June 30, 2015 as “Fiscal 2015,” June 30, 2014 as “Fiscal 2014,” and the fiscal year ended June 30, 2013 as “Fiscal 2013.”
Foreign Currency Translation	b. Foreign Currency Translation For operations outside the U.S. that have functional currencies other than the U.S. dollar, assets and liabilities are translated to U.S. dollars at period-end exchange rates, and revenue, expenses and cash flows are translated using monthly average exchange rates during the year. Gains or losses resulting from currency translation are recorded as a component of accumulated other comprehensive loss in member’s equity and in the consolidated statements of comprehensive loss. The Company considers the majority of its investments in its foreign subsidiaries to be permanently reinvested.
Use of Estimates	c. Use of Estimates The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts and accruals for billing disputes, determining useful lives for depreciation and amortization and accruals for exit activities associated with real estate leases, 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, accounting for income taxes and related valuation allowances against deferred tax assets and estimating the common unit and restricted stock unit grant fair values used to compute the stock-based compensation liability and 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
Cash and Cash Equivalents and Restricted Cash	d. Cash and Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with original maturities of three months or less to be cash and cash equivalents. Cash equivalents are stated at cost, which approximates fair value. Restricted cash consists of cash balances held by various financial institutions as collateral for letters of credit and surety bonds. These balances are reclassified to cash and cash equivalents when the underlying obligation is satisfied, or in accordance with the governing agreement. Restricted cash balances expected to become unrestricted during the next twelve months are recorded as current assets. As of June 30, 2015 and 2014, the Company had a non-current restricted cash balance of $4.8 million and $5.1 million respectively.
Trade Receivables	e. Trade Receivables Trade receivables are recorded at the invoiced amount and do not bear interest. The Company maintains an allowance for doubtful accounts for estimated losses inherent in its trade receivable portfolio. In establishing the required allowance, management considers historical losses adjusted to take into account current market conditions and the customer’s financial condition, and the age of receivables and current payment patterns. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.
Property and Equipment	f. Property and Equipment The Company’s property and equipment includes assets in service and under construction or development. Property and equipment is recorded at historical cost or acquisition date fair value. Costs associated directly with network construction, service installations, and development of business support systems, including employee-related costs, are capitalized. Depreciation is calculated on a straight-line basis over the asset’s estimated useful life from the date placed into service or acquired. Management periodically evaluates the estimates of the useful life of property and equipment by reviewing historical usage, with consideration given to technological changes, trends in the industry, and other economic factors that could impact the network architecture and asset utilization. Equipment acquired under capital leases is recorded at the lower of the fair value of the asset or the net present value of the minimum lease payments at the inception of the lease. Depreciation of equipment held under capital leases is included in depreciation and amortization expense, and is calculated on a straight-line basis over the estimated useful lives of the assets, or the related lease term, whichever is shorter. Management reviews property and equipment for impairment whenever events or changes in circumstances indicate that the carrying value of its property and equipment may not be recoverable. An impairment loss is recognized when the assets’ carrying value exceeds both the assets’ estimated undiscounted future cash flows and the assets’ estimated fair value. Measurement of the impairment loss is then based on the estimated fair value of the assets. Considerable judgment is required to project such future cash flows and, if required, to estimate the fair value of the property and equipment and the resulting amount of the impairment. No impairment charges were recorded for property and equipment during the years ended June 30, 2015, 2014 or 2013. The Company capitalizes interest for assets that require a period of time to get them ready for their intended use. The amount of interest capitalized is based on the Company’s weighted average effective interest rate for outstanding debt obligations during the respective accounting period.
Goodwill and Purchased Intangibles	g. Goodwill and Acquired Intangibles Intangible assets arising from business combinations, such as acquired customer contracts and relationships, (collectively “customer relationships”), are initially recorded at fair value. The Company amortizes customer relationships primarily over an estimated life of 10 to 20 years, using the straight-line method as this method approximates the timing in which the Company expects to receive the benefit from the acquired customer relationship assets. Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in a business combination. Goodwill is reviewed for impairment at least annually in April, or more frequently if a triggering event occurs between impairment testing dates. The Company’s impairment assessment begins with a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. The qualitative assessment includes comparing the overall financial performance of the reporting units against the planned results used in the last quantitative goodwill impairment test. Additionally, each reporting unit’s fair value is assessed in light of certain events and circumstances, including macroeconomic conditions, industry and market considerations, cost factors, and other relevant entity- and reporting unit-specific events. The selection and assessment of qualitative factors used to determine whether it is more likely than not that the fair value of a reporting unit exceeds the carrying value involves significant judgments and estimates. If it is determined under the qualitative assessment that it is more likely than not that the fair value of a reporting unit is less than its carrying value, then a two-step quantitative impairment test is performed. Under the first step, the estimated fair value of the reporting unit is compared with its carrying value (including goodwill). If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed. If the estimated fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the enterprise must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation in acquisition accounting. The residual amount after this allocation is the implied fair value of the reporting unit goodwill. Fair value of the reporting unit under the two-step assessment is determined using a combination of both income and market-based variation approaches. The inputs and assumptions to valuation methods used to estimate the fair value of reporting units involves significant judgments. The Company reviews its indefinite-lived intangible assets for impairment at least annually in April and involves comparing the estimated fair value of indefinite-lived intangible assets to their respective carrying values. To the extent the carrying value of indefinite-lived intangible assets exceeds the fair value, the Company will recognize an impairment loss for the difference. The Company performed a qualitative assessment to determine whether it was more likely than not that the fair value of these assets was in excess of the carrying value for the year ended June 30, 2015, 2014 or 2013 and has concluded there is no indication of impairment. Intangible assets with finite useful lives are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. No impairment charges were recorded for goodwill or intangibles during the years ended June 30, 2015, 2014 or 2013.
Derivative Financial Instruments	h. Derivative Financial Instruments Derivative instruments are recorded in the balance sheet as either assets or liabilities, measured at fair value. The Company has historically entered into interest rate swaps to convert a portion of its floating-rate debt to fixed-rate debt and has not applied hedge accounting; therefore, the changes in the fair value of the interest rate swaps are recognized in earnings as adjustments to interest expense. The principal objectives of the derivative instruments are to minimize the cash flow interest rate risks associated with financing activities. The Company does not use financial instruments for trading purposes. The Company utilizes interest rate swap contracts in connection with debt instruments entered into during the July 2012 financing transactions.
Revenue Recognition	i. Revenue Recognition The Company recognizes revenues derived from leasing fiber optic telecommunications infrastructure and the provision of telecommunications and colocation services when the service has been provided and when there is persuasive evidence of an arrangement, the fee is fixed or determinable, customer acceptance has been obtained with relevant contract terms, and collection of the receivable is reasonably assured. Taxes collected from customers and remitted to a governmental authority are reported on a net basis and are excluded from revenue. Most revenue is billed in advance on a fixed-rate basis and the remainder is billed in arrears on a transactional basis determined by customer usage. The Company often bills customers for upfront charges, which are non-refundable. These charges relate to activation fees, installation charges or prepayments for future services and are influenced by various business factors including how the Company and customer agree to structure the payment terms. These upfront charges are deferred and recognized over the underlying contractual term. The Company also defers costs associated with customer activation and installation to the extent of upfront amounts received from customers, which are recognized as expense over the same period for which the associated revenue is recognized. The Company typically records revenues from leases of dark fiber, including indefeasible rights-of-use (“IRU”) agreements, over the term that the customer is given exclusive access to the assets. Dark fiber IRU agreements generally require the customer to make a down payment upon the execution of the agreement with monthly IRU fees paid over the contract term; however, in some cases, the Company receives up to the entire lease payment at the inception of the lease and recognizes the revenue ratably over the lease term. Revenue related to professional services to provide network management and technical support is recognized as services are provided. In determining the appropriate amount of revenue and related reserves to reflect in its consolidated financial statements, management evaluates payment history, credit ratings, customer financial performance, and historical or potential billing disputes and related estimates are based on these factors and assumptions.
Operating Costs And Expenses	j. Operating Costs and Expenses The Company’s operating costs and expenses consist primarily of network expense (“Netex”), compensation and benefits, network operations expense (“Netops”), stock-based compensation, other expenses, and depreciation and amortization. Netex consists of third-party network service costs resulting from the leasing of certain network facilities, primarily leases of circuits and dark fiber, from carriers to augment the Company’s owned infrastructure, for which it is generally billed a fixed monthly fee. Netex also includes colocation facility costs for rent and license fees paid to the landlords of the buildings in which the Company’s colocation business operates, along with the utility costs to power those facilities. Compensation and benefits expenses include salaries, wages, incentive compensation and benefits. Employee-related costs that are directly associated with network construction, service installations and development of business support systems are capitalized and amortized to operating costs and expenses over the customer life. Compensation and benefits expenses related to the departments attributed to generating revenue are included in “Operating costs” while compensation and benefits expenses related to the sales, product, and corporate departments are included in “Selling, general and administrative expenses” in the consolidated statements of operations. Netops expense include all of the non-personnel related expenses of operating and maintaining the network infrastructure, including contracted maintenance fees, right-of-way costs, rent for cellular towers and other places where fiber is located, pole attachment fees, and relocation expenses. Netops expense is included in “Operating costs” in the consolidated statements of operations. Stock-based compensation expense consists of the fair value of equity based awards granted to employees and independent directors over their applicable vesting period. Stock-based compensation expense is included, based on the responsibilities of the awarded recipient, in either “Operating costs” or “Selling, general and administrative expenses” in the consolidated statements of operations. For additional information regarding our stock-based compensation expense, see Note 12 – Stock-Based Compensation Other expenses include expenses such as property tax, franchise fees, and colocation facility maintenance, which relate to operating our network and are therefore included in “Operating costs” as well as travel, office expense and other administrative costs that are included in “Selling, general and administrative expenses”. Other expenses are included in either “Operating costs” or “Selling, general and administrative expenses” in the consolidated statement of operations depending on their relationship to generating revenue or association with sales and administration. Transaction costs include expenses associated with professional services (i.e. legal, accounting, regulatory, etc.) rendered in connection with acquisitions or disposals (including spin-offs), travel expense, severance expense incurred on the date of acquisition or disposal, and other direct expenses incurred that are associated with signed and/or closed acquisitions or disposals. Transaction costs are included in “Selling, general and administrative expenses” in the consolidated statements of operations. Related to Netex, the Company recognizes the cost of these facilities or services when it is incurred in accordance with contractual requirements. The Company routinely disputes incorrect billings. The most prevalent types of disputes include disputes for circuits that are not disconnected on a timely basis and usage bills with incorrect records. Depending on the type and complexity of the issues involved, it may take several quarters to resolve disputes. In determining the amount of such operating expenses and related accrued liabilities to reflect in its consolidated financial statements, management considers the adequacy of documentation of disconnect notices, compliance with prevailing contractual requirements for submitting such disconnect notices and disputes to the provider of the facilities, and compliance with its interconnection agreements with these carriers. Significant judgment is required in estimating the ultimate outcome of the dispute resolution process, as well as any other costs that may be incurred to conclude the negotiations or settle any litigation.
Stock-based Compensation	k. Stock-Based Compensation In October 2014, the Company adopted a new incentive plan. The plan includes incentive cash compensation (ICC) and equity (in the form of restricted stock units). Grants under the new incentive plan are made quarterly for all participants. The Company recognizes all stock-based awards to employees and independent directors, based on their grant-date fair values and the Company’s estimates of forfeitures. The Company recognizes the fair value of outstanding awards as a charge to operations over the vesting period. The Company uses the straight-line method to recognize share-based compensation expense for outstanding share awards that do not contain a performance condition. Prior to the Company’s IPO, the Company was given authorization by CII to award 625,000,000 of CII’s common units as profits interests to employees, directors, and affiliates of the Company. The common units were historically considered to be stock-based compensation with terms that required the awards to be classified as liabilities due to cash settlement features. The vested portion of the awards was reported as a liability and the fair value was re-measured at each reporting date until the date of settlement, with a corresponding charge (or credit) to stock-based compensation expense. In connection with the Company’s IPO and the related amendment to the CII operating agreement, there was a deemed modification to the stock compensation arrangements with the Company’s employees and directors. As a result, previously issued common units which were historically accounted for as liability awards, became classified as equity awards. Determining the fair value of certain share-based awards at the grant date and subsequent reporting dates requires judgment. If actual results differ significantly from these estimates, stock-based compensation expense and the Company’s results of operations could be materially impacted. For additional information regarding our stock-based compensation, see Note 12 – Stock-Based Compensation
Legal Costs	l. Legal Costs Costs incurred to hire and retain external legal counsel to advise us on regulatory, litigation and other matters is expensed as the related services are received.
Income Taxes	m. Income Taxes The Company recognizes income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in earnings in the period that includes the enactment date. Estimating the future tax benefit associated with deferred tax assets requires significant judgment. Deferred tax assets arise from a variety of sources, the most significant being: tax losses that can be carried forward to be utilized against taxable income in future years; and expenses recognized in the Company’s financial statements but disallowed in the Company’s tax return until the associated cash flow occurs. The Company records a valuation allowance to reduce its deferred tax assets to the amount that is expected to be recognized. The valuation allowance is established if, based on available evidence, it is more-likely-than-not that all or some portion of the asset will not be realized due to the inability to generate sufficient taxable income in the period and/or of the character necessary to utilize the benefit of the deferred tax asset. When evaluating whether it is more-likely-than-not that all or some portion of the deferred tax asset will not be realized, all available evidence, both positive and negative, that may affect the realizability of deferred tax assets is identified and considered in determining the appropriate amount of the valuation allowance. The Company continues to monitor its financial performance and other evidence each quarter to determine the appropriateness of the Company’s valuation allowance. At each balance sheet date, existing assessments are reviewed and, if necessary, revised to reflect changed circumstances. The analysis of the Company’s ability to utilize its NOL balance is based on the Company’s forecasted taxable income. The forecasted assumptions approximate the Company’s best estimates, including market growth rates, future pricing, market acceptance of the Company’s products and services and future expected capital investments. If the Company is unable to meet its taxable income forecasts in future periods the Company may change its conclusion about the appropriateness of the valuation allowance which could create a substantial income tax expense in the Company’s consolidated statement of operations in the period such change occurs. Deferred tax liabilities related to investments in foreign subsidiaries and foreign corporate joint ventures that are essentially permanent in duration are not recognized until it becomes apparent that such amounts will reverse in the foreseeable future. The Company records interest related to unrecognized tax benefits and penalties in the provision for income taxes.
Fair Value of Financial Instruments	n. Fair Value of Financial Instruments Relevant accounting literature defines and establishes a framework for measuring fair value, and requires expanded disclosures about fair value measurements. It also emphasizes that fair value is a market-based measurement, not an entity-specific measurement, and defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques that may be used include the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost), which are each based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. Fair Value Hierarchy A fair value hierarchy is established that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that are used to measure fair value are: Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access. Level 2 Inputs to the valuation methodology include: • quoted prices for similar assets or liabilities in active markets; • quoted prices for identical or similar assets or liabilities in inactive markets; • inputs other than quoted prices that are observable for the asset or liability; and • inputs that are derived principally from or corroborated by observable market data by correlation or other means. If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability. Level 3 Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The Company views fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, management considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance.
Concentration of Credit Risk	o. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash investments and accounts receivable. The Company’s cash and cash equivalents are primarily held in commercial bank accounts in the United States and Great Britain. The Company limits its cash investments to high-quality financial institutions in order to minimize its credit risk. During the years ended June 30, 2015, 2014 and 2013 the Company had no single customer that exceeded 10% of total revenue. The Company’s trade receivables, which are unsecured, are geographically dispersed. As of June 30, 2015 and 2014, the Company had one customer with a trade receivable balance of 10% and 12%, respectively, of total receivables.
Reclassification of Network Related Expenses and Zayo Professional Services	p. Reclassification of Network Related Expenses and Zayo Professional Services The Company has historically included certain network related expenses associated with the operations, support and maintenance of its network assets and technical facilities, including compensation and related benefits and stock-based compensation expense associated with personnel involved in these activities, within the line item “Selling, general and administrative expenses” in its consolidated statement of operations. The Company has changed its presentation of these network related expenses to be included in operating costs in its consolidated statements of operations to differentiate costs attributed to generating revenue from selling, general and administrative expenses. This reclassification does not impact the Company’s previously reported total operating costs and expenses, operating income subtotal or net loss total for the periods presented. The following tables reflect the reclassification of network related expenses from “Selling, general and administrative expenses” to “Operating costs” for each of the quarters and annual period for Fiscal 2014. The following table reflects the reclassification of network related expenses from “Selling, general and administrative expenses” to “Operating costs” and the impact of the transfer of ZPS into the Company for each of the quarters and annual periods in Fiscal 2014. Fiscal 2014 Quarter Ended Year Ended September 30 December 31 March 31 June 30 June 30, 2014 Operating costs, as originally stated $ 34.9 $ 35.0 $ 35.4 $ 36.2 $ 141.5 Reclassification of network-related expenses 42.8 49.0 47.7 53.3 192.8 Transfer of Zayo Professional Services 2.0 1.9 1.8 3.3 9.0 Operating costs, as adjusted $ 79.7 $ 85.9 $ 84.9 $ 92.8 $ 343.3 Selling, general and administrative expenses, as originally stated $ 117.4 $ 134.2 $ 142.7 $ 176.9 $ 571.2 Reclassification of network-related expenses (42.8 ) (48.9 ) (47.8 ) (53.3 ) (192.8 ) Transfer of Zayo Professional Services 1.8 1.7 1.7 1.0 6.2 Selling, general and administrative expenses, as adjusted $ 76.4 $ 87.0 $ 96.6 $ 124.6 $ 384.6 See also Note 4 - Transfer of Zayo Professional Services. The interim and annual financial information for Fiscal 2014 have been adjusted accordingly in the Company’s condensed consolidated balance sheet and statements of operations. The effect of the transfer of ZPS into the Company on net income/(loss), other comprehensive income/(loss), and any related per-share amounts was immaterial for all prior periods presented herein
Recently Issued Accounting Pronouncements	q. Recently Issued Accounting Pronouncements Debt Issuance Costs In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs related to a recognized debt liability to be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Prior to the issuance of ASU 2015-03, debt issuance costs were required to be presented as deferred charge assets, separate from the related debt liability. ASU 2015-03 does not change the recognition and measurement requirements for debt issuance costs. The Company early-adopted ASU 2015-03 as of the end of Fiscal 2015, and applied its provisions retrospectively. The adoption of ASU 2015-03 resulted in the reclassification of $71.0 million and $89.4 million of unamortized debt issuance costs (see Note 8 – Long Term Debt Long-term debt, non-current Revenue Recognition In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers

Basis of Presentation and Sig27

Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Selling General and Administrative Expenses	The following table reflects the reclassification of network related expenses from “Selling, general and administrative expenses” to “Operating costs” and the impact of the transfer of ZPS into the Company for each of the quarters and annual periods in Fiscal 2014. Fiscal 2014 Quarter Ended Year Ended September 30 December 31 March 31 June 30 June 30, 2014 Operating costs, as originally stated $ 34.9 $ 35.0 $ 35.4 $ 36.2 $ 141.5 Reclassification of network-related expenses 42.8 49.0 47.7 53.3 192.8 Transfer of Zayo Professional Services 2.0 1.9 1.8 3.3 9.0 Operating costs, as adjusted $ 79.7 $ 85.9 $ 84.9 $ 92.8 $ 343.3 Selling, general and administrative expenses, as originally stated $ 117.4 $ 134.2 $ 142.7 $ 176.9 $ 571.2 Reclassification of network-related expenses (42.8 ) (48.9 ) (47.8 ) (53.3 ) (192.8 ) Transfer of Zayo Professional Services 1.8 1.7 1.7 1.0 6.2 Selling, general and administrative expenses, as adjusted $ 76.4 $ 87.0 $ 96.6 $ 124.6 $ 384.6

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2015
Schedule of Acquisitions	The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2015 acquisitions (in millions): AtlantaNAP Neo IdeaTek Latisys Acquisition date July 1, 2014 July 1, 2014 January 1, 2015 February 23, 2015 Cash $ — $ 4.2 $ — $ 9.4 Other current assets 0.2 9.5 0.8 17.1 Property and equipment 7.0 31.3 32.3 222.9 Deferred tax assets, net — — 2.9 — Intangibles 21.0 26.4 7.6 250.2 Goodwill 25.2 32.5 38.8 279.8 Other assets — 2.3 — 5.0 Total assets acquired 53.4 106.2 82.4 784.4 Current liabilities 1.5 13.5 4.5 10.7 Deferred revenue — 3.7 25.2 3.2 Deferred tax liability, net — 7.6 — 83.6 Other liabilities — 3.3 — — Total liabilities assumed 1.5 28.1 29.7 97.5 Net assets acquired 51.9 78.1 52.7 686.9 Less cash acquired — (4.2 ) — (9.4 ) Net consideration paid $ 51.9 $ 73.9 $ 52.7 $ 677.5 The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2014 acquisitions (in millions): Corelink Access FiberLink CoreXchange Geo Acquisition date August 1, 2013 October 1, 2013 October 2, 2013 March 4, 2014 May 16, 2014 Cash $ 0.1 $ 1.2 $ — $ — $ 13.7 Other current assets 0.5 2.3 0.8 0.6 8.8 Property and equipment 15.9 11.5 15.9 3.1 220.4 Deferred tax assets, net — — 7.7 0.2 — Intangibles 0.2 18.0 19.3 11.0 60.8 Goodwill 2.9 24.0 19.8 3.4 113.8 Other assets 0.5 — 0.1 — 9.8 Total assets acquired 20.1 57.0 63.6 18.3 427.3 Current liabilities 0.7 1.0 1.3 0.5 34.8 Deferred revenue 0.2 5.1 19.2 0.4 45.1 Capital lease obligations 14.2 — — 0.2 — Deferred tax liability, net 3.0 9.6 — — 38.2 Other liabilities — — — — 3.2 Total liabilities assumed 18.1 15.7 20.5 1.1 121.3 Net assets acquired 2.0 41.3 43.1 17.2 306.0 Less cash acquired (0.1 ) (1.2 ) — — (13.7 ) Net consideration paid $ 1.9 $ 40.1 $ 43.1 $ 17.2 $ 292.3 The table below reflects the Company's estimates of the acquisition date fair values of the acquired assets and liabilities assumed from its Fiscal 2013 acquisitions (in millions): AboveNet Fibergate US Carrier First Telecom Litecast Core NAP Acquisition date July 2, 2012 August 31, 2012 October 1, 2012 December 14, 2012 December 14, 2012 May 31, 2013 Cash $ 141.6 $ 2.3 $ — $ — $ — $ — Other current assets 46.5 4.9 1.3 5.9 0.3 0.2 Property and equipment 1,477.3 59.0 19.4 63.5 0.4 2.5 Deferred tax assets, net 42.1 — 2.0 19.2 — — Intangibles 480.4 35.9 6.8 17.1 12.5 4.1 Goodwill 381.6 53.8 5.4 48.4 9.9 1.0 Other assets 12.6 — — 0.1 — — Total assets acquired 2,582.1 155.9 34.9 154.2 23.1 7.8 Current liabilities 78.4 1.5 3.7 4.6 0.2 0.5 Deferred revenue 146.0 2.5 2.2 39.9 0.7 — Other liabilities 6.1 — — — — 0.2 Deferred tax liability, net — 31.3 — — — — Total liabilities assumed 230.5 35.3 5.9 44.5 0.9 0.7 Net assets acquired 2,351.6 120.6 28.9 109.7 22.2 7.1 Cost method investment in USCarrier — — (12.8 ) — — — Less cash acquired (141.6 ) (2.3 ) — — — — Net consideration paid $ 2,210.0 $ 118.3 $ 16.1 $ 109.7 $ 22.2 $ 7.1
Schedule of Deferred Tax Assets and Liabilities	Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (millions): June 30, 2015 2014 Deferred income tax assets Net operating loss carry forwards $ 434.0 $ 415.6 Alternate minimum tax credit carryforwards 8.4 6.3 Deferred revenue 243.5 190.7 Accrued expenses 27.9 22.4 Other liabilities 14.4 7.6 Reserves against accounts receivable 10.2 6.4 Other 17.4 2.1 Total deferred income tax assets 755.8 651.1 Valuation allowance (1.1 ) (2.2 ) Net deferred tax assets 754.7 648.9 Deferred income tax liabilities Property and equipment 468.9 374.4 Intangible assets 327.2 239.3 Debt issuance costs 18.8 27.2 Total deferred income tax liabilities 814.9 640.9 Net deferred income tax assets/(liabilities) $ (60.2 ) $ 8.0
Schedule of Purchase Accounting Adjustments	The following table reflects the financial statement captions impacted by the purchase accounting adjustments: Adjusted Balance June 30, 2014 Previously Reported Balance* June 30, 2014 Purchase accounting adjustment Assets Current assets Trade receivables, net 57.2 59.0 (1.8 ) Prepaid expenses 24.9 25.6 (0.7 ) Deferred income taxes, net 161.0 160.4 0.6 Total current assets 243.1 245.0 (1.9 ) Property and equipment, net 2,822.4 2,821.4 1.0 Intangible assets, net 710.3 709.7 0.6 Goodwill 866.7 845.3 21.4 Other assets 37.7 37.8 (0.1 ) Total assets $ 4,680.2 $ 4,659.2 $ 21.0 Liabilities Current liabilities Accounts payable 26.7 27.0 (0.3 ) Accrued liabilities 172.3 159.6 12.7 Total current liabilities 199.0 186.6 12.4 Capital lease obligation, non-current 25.7 22.9 2.8 Deferred revenue, non-current 501.5 496.9 4.6 Deferred income taxes, net 153.0 151.8 1.2 Total liabilities $ 879.2 $ 858.2 $ 21.0
Schedule Of Pro-Forma Financial Information	The unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisitions been consummated as of July 1, 2013. Year Ended June 30, 2015 2014 Revenue $ 1,420.2 $ 1,329.6 Net loss $ (182.4 ) $ (221.5 )
Acquisitions [Member]
Schedule of Deferred Tax Assets and Liabilities	The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in millions): Latisys Geo AboveNet February 23, May 16, 2014 July 2, 1012 Deferred income tax assets: Net operating loss carryforwards $ 49.9 $ 2.5 $ 405.3 Deferred revenue 1.1 4.4 49.1 Accrued expenses 0.1 — 12.2 Allowance for doubtful accounts 0.3 — 2.5 Other 0.4 — — Total deferred income tax assets 51.8 6.9 469.1 Deferred income tax liabilities: Property and equipment (42.3 ) (32.9 ) (250.0 ) Intangible assets (93.1 ) (12.2 ) (177.0 ) Total deferred income tax liabilities (135.4 ) (45.1 ) (427.0 ) Net deferred income tax asset/(liabilities) $ (83.6 ) $ (38.2 ) $ 42.1

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Jun. 30, 2015
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment, including assets held under capital leases, was comprised of the following (in millions): Estimated useful lives As of June 30, (in years) 2015 2014 Land N/A $ 16.2 $ 0.7 Building leasehold and site improvements 15 to 20 109.2 64.7 Furniture, fixtures and office equipment 3 to 7 5.1 5.7 Computer hardware 3 to 5 15.1 16.7 Software 3 8.3 9.3 Machinery and equipment 5 to 7 272.1 94.9 Fiber optic equipment 8 623.3 583.7 Circuit switch equipment 10 12.1 11.8 Packet switch equipment 5 76.2 62.8 Fiber optic network 15 to 20 2,715.4 2,450.8 Construction in progress N/A 437.1 259.0 Total 4,290.1 3,560.1 Less accumulated depreciation (990.9 ) (737.7 ) Property and equipment, net $ 3,299.2 $ 2,822.4

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Jun. 30, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule Of Goodwill	The following reflects the changes in the carrying amount of goodwill during Fiscal 2015 (in millions): Product Group As of July 1, 2014 Fiscal 2015 Acquisitions Foreign Currency Translation and Other As of June 30, 2015 Dark Fiber $ 293.3 $ 16.0 $ (10.2 ) $ 299.1 Waves 269.0 1.4 (4.8 ) 265.6 Sonet 50.3 — — 50.3 Ethernet 96.7 8.2 (0.7 ) 104.2 IP 80.5 6.8 (1.0 ) 86.3 MIG 43.7 29.8 (0.1 ) 73.4 zColo 18.6 256.0 (1.4 ) 273.2 Cloud — 57.2 (0.2 ) 57.0 Other 14.6 0.9 (0.2 ) 15.3 Total $ 866.7 $ 376.3 $ (18.6 ) $ 1,224.4 The following reflects the changes in the carrying amount of goodwill during Fiscal 2014 (in millions): Product Group As of July 1, 2013 Fiscal 2014 Acquisitions Foreign Currency Translation and Other As of June 30, 2014 Dark Fiber $ 193.3 $ 97.4 $ 2.6 $ 293.3 Waves 215.9 49.6 3.5 269.0 Sonet 50.3 — — 50.3 Ethernet 91.7 4.9 0.1 96.7 IP 80.1 0.2 0.2 80.5 MIG 38.3 5.4 — 43.7 zColo 11.9 6.4 0.3 18.6 Other 7.3 — 7.3 14.6 Total $ 688.8 $ 163.9 $ 14.0 $ 866.7

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2015
Intangible Assets Net Excluding Goodwill [Abstract]
Schedule of Identifiable Acquisition Related Intangible Assets	Identifiable acquisition-related intangible assets as of June 30, 2015 and 2014 were as follows (in millions): Gross Carrying Amount Accumulated Amortization Net June 30, 2015 Finite-Lived Intangible Assets Customer relationships $ 1,080.3 $ (155.0 ) $ 925.3 Trade names 0.2 (0.1 ) 0.1 Underlying rights 1.7 (0.2 ) 1.5 Total 1,082.2 (155.3 ) 926.9 Indefinite-Lived Intangible Assets Certifications 3.5 — 3.5 Underlying Rights 17.9 — 17.9 Total $ 1,103.6 $ (155.3 ) $ 948.3 June 30, 2014 Finite-Lived Intangible Assets Customer relationships $ 789.2 $ (103.6 ) $ 685.6 Trade names 0.1 — 0.1 Underlying rights 1.8 (0.1 ) 1.7 Total 791.1 (103.7 ) 687.4 Indefinite-Lived Intangible Assets Certifications 3.5 — 3.5 Underlying rights 19.4 — 19.4 Total $ 814.0 $ (103.7 ) $ 710.3
Schedule of Estimated Future Amortization of Finite-Lived Intangible Assets	Estimated future amortization of finite-lived intangible assets is as follows (in millions): Year Ended June 30, 2016 $ 66.3 2017 66.2 2018 66.2 2019 66.2 2020 62.6 Thereafter 599.4 Total $ 926.9

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Schedule of Debt	As of June 30, 2015 and 2014, long-term debt was as follows (in millions): 2015 2014 Term Loan Facility due 2021 $ 1,646.8 $ 2,010.8 8.125% Senior Secured Notes due 2020 — 750.0 10.125% Senior Unsecured Notes due 2020 325.6 500.0 6.00% Senior Unsecured Notes Due 2023 1,430.0 — 6.375% Senior Unsecured Notes Due 2025 350.0 — Total debt obligations 3,752.4 3,260.8 Unamortized discount on Term Loan Facility (19.8 ) (20.6 ) Unamortized premium on 6.00% Senior Unsecured Notes 7.1 — Unamortized debt issuance costs (71.0 ) (89.4 ) Carrying value of debt 3,668.7 3,150.8 Less current portion (16.5 ) (20.5 ) Long-term debt, less current portion $ 3,652.2 $ 3,130.3
Schedule Of Debt Instrument Redemption Price	On or after May 1, 2020 ( for the 2025 Unsecured Notes for the 2023 Unsecured Notes July 1, 2016 (for the 2020 Unsecured Notes) Year Redemption Price (2020 Unsecured Notes) 2016 105.063% 2017 102.531% 2018 and thereafter 100.000% Year Redemption Price (2023 Unsecured Notes) 2018 104.500% 2019 103.000% 2020 101.500% 2021 and thereafter 100.000% Year Redemption Price (2025 Unsecured Notes) 2020 103.188% 2021 102.125% 2022 101.063% 2023 and thereafter 100.000%
Schedule of Future Contractual Maturities of Long-term Debt	Aggregate future contractual maturities of long-term debt (excluding issue discounts and premiums) were as follows as of June 30, 2015 (in millions): Year Ended June 30, 2016 $ 16.5 2017 16.5 2018 16.5 2019 16.5 2020 16.5 Thereafter 3,669.9 Total $ 3,752.4

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes	The Company’s (benefit)/provision for income taxes from operations are summarized as follows (in millions): Year Ended June 30, 2015 2014 2013 Current Income Taxes Federal $ 1.7 $ 6.3 $ — State 4.4 3.8 1.7 Foreign (1.6 ) 3.3 — Total $ 4.5 $ 13.4 $ 1.7 Deferred Income Taxes Federal $ (8.6 ) $ 26.3 $ (23.5 ) State (6.9 ) 1.2 (3.5 ) Foreign 2.3 (0.6 ) 3.5 Total (13.2 ) 26.9 (23.5 ) Total (benefit)/provision for income taxes $ (8.7 ) $ 40.3 $ (21.8 )
Schedule of Income before Income Tax	The United States and foreign components of (loss)/benefit from operations before income taxes are as follows (in millions): Year Ended June 30, 2015 2014 2013 United States $ (159.4 ) $ (127.8 ) $ (179.5 ) Foreign $ (4.4 ) $ (9.0 ) $ 15.8 Total $ (163.8 ) $ (136.8 ) $ (163.7 )
Schedule Of Reconciliation Of Income Tax Provision	A reconciliation of the actual income tax provision and the tax computed by applying the U.S. federal rate to the earnings before income taxes during the years ended June 30, 2015, 2014 and 2013 are as follows (in millions): Year ended June 30, 2015 2014 2013 Expected benefit/provision at the statutory rate $ (57.3 ) $ (47.9 ) $ (57.1 ) Increase/(decrease) due to: Non-deductible stock-based compensation 59.4 96.5 35.6 State income taxes benefit, net of federal benefit (7.4 ) (6.3 ) (1.9 ) Transactions costs not deductible for tax purposes 0.7 0.8 1.3 Reversal of uncertain tax positions, net — (2.6 ) — State NOL adjustment — — 2.8 Change in effective tax rate (2.2 ) (0.3 ) — Change in valuation allowance — 1.3 — Foreign tax rate differential 0.6 1.0 (2.3 ) Other, net (2.5 ) (2.2 ) (0.2 ) (Benefit)/provision for income taxes $ (8.7 ) $ 40.3 $ (21.8 )
Schedule of Deferred Tax Assets and Liabilities	Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (millions): June 30, 2015 2014 Deferred income tax assets Net operating loss carry forwards $ 434.0 $ 415.6 Alternate minimum tax credit carryforwards 8.4 6.3 Deferred revenue 243.5 190.7 Accrued expenses 27.9 22.4 Other liabilities 14.4 7.6 Reserves against accounts receivable 10.2 6.4 Other 17.4 2.1 Total deferred income tax assets 755.8 651.1 Valuation allowance (1.1 ) (2.2 ) Net deferred tax assets 754.7 648.9 Deferred income tax liabilities Property and equipment 468.9 374.4 Intangible assets 327.2 239.3 Debt issuance costs 18.8 27.2 Total deferred income tax liabilities 814.9 640.9 Net deferred income tax assets/(liabilities) $ (60.2 ) $ 8.0
Schedule of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties, is as follows (in millions): Year Ended June 30, 2014 Balance, beginning of year $ 6.4 Decreases (6.4 ) Balance, end of year $ —

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Jun. 30, 2015
Payables And Accruals [Abstract]
Schedule of Accrued Liabilities	Accrued liabilities included in current liabilities consisted of the following (in millions): Year Ended June 30, 2015 2014 Accrued compensation and benefits $ 19.4 $ 13.3 Accrued property and equipment purchases 54.7 46.2 Network expense accruals 77.2 79.2 Other accrued taxes 12.7 9.3 Accrued professional fees 3.4 3.9 Other accruals 15.0 20.4 Total $ 182.4 $ 172.3

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Employee Service Share-based Compensation Allocation of Recognized Period Costs	The following tables summarize the Company’s stock-based compensation expense for liability and equity classified awards included in the consolidated statements of operations (in millions). Year Ended June 30, Included in: 2015 2014 2013 Operating costs $ 23.3 $ 20.2 $ 7.7 Selling, general and administrative expenses 177.4 233.5 98.1 Total stock-based compensation expense $ 200.7 $ 253.7 $ 105.8 CII Common units $ 156.4 $ 253.3 $ 104.9 CII Preferred units 0.4 0.4 0.9 Part A restricted stock units 12.6 — — Part B restricted stock units 31.3 — — Total stock-based compensation expense $ 200.7 $ 253.7 $ 105.8
Summary Of Part B RSU Issuance	The table below reflects the total Part B RSUs granted during each period presented, the maximum eligible shares of ZGH’s stock that the respective Part B RSU grant could be converted into shares of ZGH’s common stock and the grant date fair value per Part B RSU (in millions): During the three months ended June March 31, 2015 December 31, 2014 Part B RSUs granted 316,353 359,658 575,660 Maximum eligible shares of the Company's stock 1,490,023 1,381,086 2,210,534 Grant date fair value per Part B RSU $ 27.10 $ 24.36 $ 63.12

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis	Financial instruments measured at fair value on a recurring basis are summarized below Level June 30, 2015 June 30, 2014 Liabilities Recorded at Fair Value in the Financial Statements: Interest rate swap Level 2 $ 4.1 $ 2.0

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2015
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Contractual Capital Lease Payments	Future contractual payments under the terms of the Company’s capital lease obligations were as follows (in millions): Year Ended June 30, 2016 $ 6.4 2017 7.0 2018 5.6 2019 5.0 2020 3.8 Thereafter 17.3 Total minimum lease payments 45.1 Less amounts representing interest (12.4 ) Less current portion (4.4 ) Capital lease obligations, non-current $ 28.3
Schedule of Future Contractual Long-Term Operating Lease Payments	Minimum contractual lease payments due under the Company’s long-term operating leases are as follows (in millions): Year Ended June 30, 2016 $ 119.3 2017 86.9 2018 75.4 2019 62.7 2020 48.9 Thereafter 280.7 $ 673.9

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Jun. 30, 2015
O V S [Member]
Related Party Transaction [Line Items]
Revenue and Expense Transactions Recognized	The following table represents the revenue and expense transactions the Company recorded with OVS (in millions): Year Ended June 30, 2015 2014 2013 Revenues $ 6.9 $ 7.0 6.6 Operating costs $ 1.0 $ 1.6 1.5

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Summary of Financial Information by Segments	For the year ended June 30, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 662.4 $ 661.5 $ 23.2 $ — $ 1,347.1 Segment Adjusted EBITDA 432.8 344.5 5.3 — 782.6 Total assets 3,694.3 1,976.0 35.0 388.7 6,094.0 Capital expenditures 328.4 201.8 0.2 — 530.4 For the year ended June 30, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 495.4 $ 606.2 $ 28.1 $ — $ 1,129.7 Segment Adjusted EBITDA 325.6 326.7 8.0 — 660.3 Total assets 2,872.5 1,739.1 43.1 326.2 4,980.9 Capital expenditures 209.2 151.6 — — 360.8 For the year ended June 30, 2013 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 413.0 $ 570.5 $ 27.8 $ (0.3 ) $ 1,011.0 Segment Adjusted EBITDA 276.1 278.3 6.2 (0.1 ) 560.5 Total assets (1) 2,311.5 1,685.5 32.4 122.7 4,152.1 Capital expenditures, net of stimulus grant reimbursements 180.3 143.0 — — 323.3 Additionally, total assets in the table below have been adjusted to exclude debt issuance costs (see Note 8 –Long Term Debt For the three months ended September 30, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 154.0 $ 160.5 $ 6.1 $ — $ 320.6 Segment Adjusted EBITDA 98.4 83.2 1.4 — 183.0 Total assets 2,891.8 1,756.5 40.5 284.1 4,972.9 Capital expenditures, net of stimulus grant reimbursements 69.0 46.3 — — 115.3 For the three months ended December 31, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 156.4 $ 162.0 $ 5.5 $ — $ 323.9 Segment Adjusted EBITDA 102.9 85.7 1.1 — 189.7 Total assets 2,900.5 1,768.0 36.1 284.2 4,988.8 Capital expenditures, net of stimulus grant reimbursements 77.0 52.5 — — 129.5 For the six months ended December 31, 2014 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 310.4 $ 322.6 $ 11.5 $ — $ 644.5 Segment Adjusted EBITDA 201.3 168.9 2.5 — 372.7 Capital expenditures, net of stimulus grant reimbursements 146.0 98.8 — — 244.8 For the three months ended March 31, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 168.2 $ 166.8 $ 5.7 $ — $ 340.7 Segment Adjusted EBITDA 110.5 87.3 1.2 — 199.0 Total assets 3,615.5 1,946.3 38.5 285.9 5,886.2 Capital expenditures, net of stimulus grant reimbursements 83.2 46.9 — — 130.1 For the nine months ended March 31, 2015 (in millions) Physical Infrastructure Cloud and Connectivity Other Corp/ Eliminations Total Revenue from external customers $ 478.6 $ 489.4 $ 17.2 $ — $ 985.2 Segment Adjusted EBITDA 311.7 256.2 3.8 — 571.7 Capital expenditures, net of stimulus grant reimbursements 229.2 145.7 — — 374.9
Reconciliation from net earnings/(loss) to Adjusted EBITDA by segment and on a consolidated basis	Reconciliation from Total Segment Adjusted EBITDA to net loss from operations For the year ended June 30, 2015 2014 2013 (in millions) Total Segment Adjusted EBITDA $ 782.6 $ 660.3 $ 560.5 Interest expense (214.0 ) (203.5 ) (202.5 ) Depreciation and amortization expense (406.2 ) (338.2 ) (324.5 ) Transaction costs (5.9 ) (4.5 ) (14.2 ) Stock-based compensation (200.7 ) (253.7 ) (105.8 ) Loss on extinguishment of debt (94.3 ) (1.9 ) (77.3 ) Unrealized foreign currency gain/(loss) (24.4 ) 4.7 0.1 Non-cash loss on investments (0.9 ) — — Net loss from continuing operations before provision for income taxes $ (163.8 ) $ (136.8 ) $ (163.7 )
Schedule of Geographical Information	The following is a summary of geographical information (in millions): For the year ended June 30, 2015 2014 2013 Revenue from external customers: United States $ 1,193.5 $ 1,059.3 $ 953.1 United Kingdom 119.0 70.3 57.5 Japan — 0.1 0.4 France 34.6 — — Total Revenue $ 1,347.1 $ 1,129.7 $ 1,011.0 Long-lived assets: United States $ 3,848.0 $ 3,140.2 2,995.3 United Kingdom 405.3 429.9 120.2 Japan 0.3 0.3 — France 48.7 — — Total Long-lived assets $ 4,302.3 $ 3,570.4 $ 3,115.5

Condensed Consolidating Finan40

Condensed Consolidating Financial Information (Tables)	12 Months Ended
	Jun. 30, 2015
Condensed Consolidating Financial Information [Abstract]
Schedule Of Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheets Year Ended June 30, 2015 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Assets Current assets Cash and cash equivalents $ 274.3 $ 4.7 $ 29.0 $ — 308.0 Trade receivables, net of allowance 54.7 4.6 28.7 — 88.0 Due from related parties (1.3 ) 0.4 2.9 (1.4 ) 0.6 Prepaid expenses 25.8 4.4 7.1 — 37.3 Deferred income taxes, net 128.5 — 1.0 — 129.5 Other assets 3.6 — 0.3 — 3.9 Total current assets 485.6 14.1 69.0 (1.4 ) 567.3 Property and equipment, net 2,622.9 335.5 340.8 — 3,299.2 Intangible assets, net 605.8 239.5 103.0 — 948.3 Goodwill 762.2 281.0 181.2 — 1,224.4 Other assets 36.2 8.3 10.3 — 54.8 Related party receivable 304.8 — — (304.8 ) — Investment in subsidiary 1,050.8 — — (1,050.8 ) — Total assets $ 5,868.3 $ 878.4 $ 704.3 $ (1,357.0 ) $ 6,094.0 Liabilities and member's equity Current liabilities Current portion of long-term debt $ 16.5 $ — $ — $ — 16.5 Accounts payable 26.6 4.0 9.4 — 40.0 Accrued liabilities 125.6 20.6 36.2 — 182.4 Accrued interest 57.2 — — — 57.2 Capital lease obligations, current 2.0 1.6 0.8 — 4.4 Due to related parties 1.7 — — (1.4 ) 1.3 Deferred revenue, current 73.2 2.8 10.6 — 86.6 Total current liabilities 302.8 29.0 58.0 (1.4 ) 388.4 Long-term debt, non-current 3,652.2 — — — 3,652.2 Related party debt, long-term — — 304.8 (304.8 ) — Capital lease obligation, non-current 5.6 18.6 4.1 — 28.3 Deferred revenue, non-current 559.4 4.6 48.7 — 612.7 Stock-based compensation liability 1.5 0.1 0.3 — 1.9 Deferred income taxes, net 139.2 — 50.5 — 189.7 Other long-term liabilities 13.5 10.5 2.7 — 26.7 Total liabilities 4,674.2 62.8 469.1 (306.2 ) 4,899.9 Member's equity Member's interest 1,730.1 778.1 251.2 (1,060.3 ) 1,699.1 Accumulated other comprehensive (loss)/income — — (7.9 ) — (7.9 ) Accumulated deficit (536.0 ) 37.5 (8.1 ) — (497.1 ) Total member's equity 1,194.1 815.6 235.2 (1,050.8 ) 1,194.1 Total liabilities and member's equity $ 5,868.3 $ 878.4 $ 704.3 $ (1,357.0 ) $ 6,094.0 Condensed Consolidating Balance Sheets Year Ended June 30, 2014 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Assets Current assets Cash and cash equivalents $ 256.0 $ 5.8 $ 35.6 $ — 297.4 Trade receivables, net of allowance 33.6 8.2 15.4 — 57.2 Due from related parties 0.3 — 0.6 — 0.9 Prepaid expenses 18.7 0.9 5.3 — 24.9 Deferred income taxes, net 156.0 3.5 1.5 — 161.0 Other assets 1.9 — 0.5 — 2.4 Total current assets 466.5 18.4 58.9 — 543.8 Property and equipment, net 2,389.3 109.3 323.8 — 2,822.4 Intangible assets, net 563.7 51.1 95.5 — 710.3 Goodwill 683.5 38.0 145.2 — 866.7 Other assets 23.4 3.5 10.8 — 37.7 Related party receivable 267.8 — — (267.8 ) — Investment in subsidiary 332.1 — — (332.1 ) — Total assets $ 4,726.3 $ 220.3 $ 634.2 $ (599.9 ) $ 4,980.9 Liabilities and member's equity Current liabilities Current portion of long-term debt $ 20.5 $ — $ — $ — 20.5 Accounts payable 20.4 4.3 2.0 — 26.7 Accrued liabilities 125.0 21.0 26.3 — 172.3 Accrued interest 57.1 — — — 57.1 Capital lease obligations, current 1.5 0.9 — — 2.4 Due to related parties (0.7 ) — 0.7 — — Deferred revenue, current 56.7 1.6 17.1 — 75.4 Total current liabilities 280.5 27.8 46.1 — 354.4 Long-term debt, non-current 3,130.3 — — — 3,130.3 Related party debt, long-term — — 267.8 (267.8 ) — Capital lease obligation, non-current 5.6 18.4 1.7 — 25.7 Deferred revenue, non-current 459.5 8.6 33.4 — 501.5 Stock-based compensation liability 343.8 23.3 25.3 — 392.4 Deferred income taxes, net 93.0 — 45.3 — 153.0 Other long-term liabilities 12.3 9.8 0.2 — 22.3 Total liabilities 4,325.0 102.6 419.8 (267.8 ) 4,579.6 Member's equity Member's interest 782.2 73.8 205.0 (332.1 ) 728.9 Accumulated other comprehensive (loss)/income — — 14.4 — 14.4 Accumulated deficit (380.9 ) 43.9 (5.0 ) — (342.0 ) Total member's equity 401.3 117.7 214.4 (332.1 ) 401.3 Total liabilities and member's equity $ 4,726.3 $ 220.3 $ 634.2 $ (599.9 ) $ 4,980.9
Schedule Of Condensed Consolidating Statements Of Operations	Condensed Consolidating Statements of Operations Year Ended June 30, 2015 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 1,040.1 $ 151.6 $ 155.4 $ — $ 1,347.1 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 313.8 54.4 45.3 — 413.5 Selling, general and administrative expenses (including stock-based compensation) 266.4 38.9 52.8 — 358.1 Depreciation and amortization 321.7 42.7 41.8 — 406.2 Total operating costs and expenses 901.9 136.0 139.9 — 1,177.8 Operating income 138.2 15.6 15.5 — 169.3 Other expenses Interest expense (177.0 ) (20.3 ) (16.7 ) — (214.0 ) Loss on extinguishment of debt (91.8 ) (1.7 ) (0.8 ) — (94.3 ) Foreign currency (loss)/gain on intercompany loans (23.2 ) — (1.2 ) — (24.4 ) Other income, net (0.4 ) — — — (0.4 ) Equity in net earnings of subsidiaries (9.5 ) — — 9.5 — Total other expense, net (301.9 ) (22.0 ) (18.7 ) 9.5 (333.1 ) (Loss)/earnings before provision for income taxes (163.7 ) (6.4 ) (3.2 ) 9.5 (163.8 ) (Benefit)/provision for income taxes (8.6 ) — (0.1 ) — (8.7 ) Net (loss)/earnings $ (155.1 ) $ (6.4 ) $ (3.1 ) $ 9.5 $ (155.1 ) Condensed Consolidating Statements of Operations Year Ended June 30, 2014 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 956.5 $ 102.8 $ 70.4 $ — $ 1,129.7 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 290.1 45.5 7.7 — 343.3 Selling, general and administrative expenses (including stock-based compensation) 327.3 28.3 29.0 — 384.6 Depreciation and amortization 307.6 13.8 16.8 — 338.2 Total operating costs and expenses 925.0 87.6 53.5 — 1,066.1 Operating income 31.5 15.2 16.9 — 63.6 Other expenses Interest expense (201.1 ) — (2.4 ) — (203.5 ) Loss on extinguishment of debt (1.9 ) — — — (1.9 ) Foreign currency (loss)/gain on intercompany loans 3.5 — 1.2 — 4.7 Other income, net 0.3 — — — 0.3 Equity in net earnings of subsidiaries 28.2 — — (28.2 ) — Total other expense, net (171.0 ) — (1.2 ) (28.2 ) (200.4 ) (Loss)/earnings before provision for income taxes (139.5 ) 15.2 15.7 (28.2 ) (136.8 ) (Benefit)/provision for income taxes 37.6 - 2.7 — 40.3 Net (loss)/earnings $ (177.1 ) $ 15.2 $ 13.0 $ (28.2 ) $ (177.1 ) Condensed Consolidating Statements of Operations Year Ended June 30, 2013 Zayo Group, LLC Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Total (Issuer) Revenue $ 876.4 $ 85.4 $ 57.9 $ (8.7 ) $ 1,011.0 Operating costs and expenses Operating costs (excluding depreciation amortiztion and including stock-based compensation) 255.5 50.4 16.9 (8.7 ) 314.1 Selling, general and administrative expenses (including stock-based compensation) 229.5 9.4 17.8 — 256.7 Depreciation and amortization 301.4 9.8 13.3 — 324.5 Total operating costs and expenses 786.4 69.6 48.0 (8.7 ) 895.3 Operating income 90.0 15.8 9.9 — 115.7 Other expenses Interest expense (202.1 ) — (0.4 ) — (202.5 ) Loss on extinguishment of debt (77.3 ) — — — (77.3 ) Foreign currency (loss)/gain on intercompany loans 0.1 — — — 0.1 Other income, net 0.2 — 0.1 — 0.3 Equity in net earnings of subsidiaries 20.7 — — (20.7 ) — Total other expense, net (258.4 ) — (0.3 ) (20.7 ) (279.4 ) (Loss)/earnings before provision for income taxes (168.4 ) 15.8 9.6 (20.7 ) (163.7 ) (Benefit)/provision for income taxes (26.5 ) — 4.7 — (21.8 ) Net (loss)/earnings $ (141.9 ) $ 15.8 $ 4.9 $ (20.7 ) $ (141.9 )
Schedule Of Condensed Consolidating Statements Of Cash Flows	Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2015 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 489.3 $ 55.7 62.0 $ 607.0 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (436.8 ) (47.8 ) (45.8 ) (530.4 ) Acquisitions, net of cash acquired (113.5 ) (668.3 ) (73.9 ) (855.7 ) Net cash used in investing activities (550.3 ) (716.1 ) (119.7 ) (1,386.1 ) Cash flows from financing activities: Proceeds from debt 1,747.2 — 40.1 1,787.3 Proceeds from equity offerings and contributions (290.9 ) 660.7 15.2 385.0 Direct costs associated with equity offerings - — — - Principal payments on long-term debt (1,288.5 ) — — (1,288.5 ) Payment of early redemption fees on debt extinguished (62.6 ) — — (62.6 ) Principal repayments on capital lease obligations (1.7 ) (1.4 ) (0.4 ) (3.5 ) Payment of debt issuance costs (24.2 ) — — (24.2 ) Net cash provided by financing activities 79.3 659.3 54.9 793.5 Effect of changes in foreign exchange rates on cash — — (3.8 ) (3.8 ) Net (decrease)/increase in cash and cash equivalents 18.3 (1.1 ) (2.8 ) 14.4 Cash and cash equivalents, beginning of period 256.0 5.8 35.6 297.4 Cash and cash equivalents, end of period $ 274.3 $ 4.7 $ 29.0 $ 308.0 Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2014 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 485.5 43.2 33.3 $ 562.0 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (316.6 ) (28.2 ) (16.0 ) (360.8 ) Acquisitions, net of cash acquired (83.2 ) (17.8 ) (292.3 ) (393.3 ) Net cash used in investing activities (399.8 ) (46.0 ) (308.3 ) (754.1 ) Cash flows from financing activities: Proceeds from debt 423.6 — — 423.6 Proceeds from revolving credit facility 195.0 — — 195.0 Proceeds from equity offerings and contributions 11.2 (5.6 ) — 5.6 Distribution to parent (1.2 ) — — (1.2 ) Dividends received/(paid) (70.8 ) 15.8 55.0 — Principal payments on long-term debt (18.0 ) — — (18.0 ) Principal repayments on capital lease obligations (2.1 ) (5.8 ) — (7.9 ) Payment of)/receipt from intercompany loans (251.1 ) — 251.1 — Payments on revolving credit facility (195.0 ) — — (195.0 ) Payment of debt issuance costs (4.9 ) — — (4.9 ) Net cash provided by financing activities 86.7 4.4 306.1 397.2 Effect of changes in foreign exchange rates on cash — — 1.0 1.0 Net (decrease)/increase in cash and cash equivalents 172.4 1.6 31.1 205.1 Cash and cash equivalents, beginning of period 83.6 4.2 3.5 91.3 Cash and cash equivalents, end of period $ 256.0 $ 5.8 $ 35.6 $ 297.4 Condensed Consolidating Statements of Cash Flows Year Ended June 30, 2013 Zayo Group, LLC (Issuer) Guarantor Subsidiaries Non-Guarantor Subsidiaries Total Net cash provided by operating activities $ 359.3 $ 31.8 $ 13.6 $ 404.7 Cash flows from investing activities: Purchases of property and equipment, net of stimulus grants (299.8 ) (14.1 ) (9.4 ) (323.3 ) Acquisitions, net of cash acquired (2,489.0 ) 0.4 7.9 (2,480.7 ) Net cash used in investing activities (2,788.8 ) (13.7 ) (1.5 ) (2,804.0 ) Cash flows from financing activities: Proceeds from debt 3,184.4 4.9 — 3,189.3 Proceeds from equity offerings and contributions 344.0 — — 344.0 Dividends received/(paid) 18.6 (18.6 ) — — Principal payments on long-term debt (1,058.6 ) — — (1,058.6 ) Payment of early redemption fees on debt extinguished (72.1 ) — — (72.1 ) Principal repayments on capital lease obligations (1.8 ) (0.1 ) — (1.9 ) Payment of)/receipt from intercompany loans 8.3 — (8.3 ) — Payment of debt issuance costs (83.1 ) — — (83.1 ) Changes in restricted cash, net 22.6 — — 22.6 Net cash provided by financing activities 2,362.3 (13.8 ) (8.3 ) 2,340.2 Effect of changes in foreign exchange rates on cash 0.1 (0.1 ) (0.3 ) (0.3 ) Net (decrease)/increase in cash and cash equivalents (67.2 ) 4.3 3.8 (59.1 ) Cash and cash equivalents, beginning of period 150.7 — — 150.7 Cash and cash equivalents, end of period $ 83.6 $ 4.2 $ 3.5 $ 91.3

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Results	The following table presents the unaudited quarterly results for the year ended June 30, 2015 (in millions): 2015 Quarter Ended (1) September December 31 March 31 (3) (4) June 30 Total Revenue $ 320.6 $ 323.9 $ 340.7 $ 361.9 $ 1,347.1 Operating costs and expenses Operating costs (excluding depreciation and amortization and including stock-based compensation) 107.3 97.8 100.9 107.5 413.5 Selling, general and administrative expenses (including stock-based compensation) (2) 156.6 32.1 83.0 86.4 358.1 Depreciation and amortization 96.0 96.9 100.1 113.2 406.2 Total operating costs and expenses 359.9 226.8 284.0 307.1 1,177.8 Operating income (39.3 ) 97.1 56.7 54.8 169.3 Other expenses Interest expense (46.9 ) (53.4 ) (60.7 ) (53.0 ) (214.0 ) Loss on extinguishment of debt (5) — (30.9 ) (54.9 ) (8.5 ) (94.3 ) Foreign currency (loss)/gain on intercompany loans (14.7 ) (13.3 ) (13.2 ) 16.8 (24.4 ) Other (expense)/income, net — (0.1 ) — (0.3 ) (0.4 ) Total other expenses, net (61.6 ) (97.7 ) (128.8 ) (45.0 ) (333.1 ) (Loss)/earnings from operations before income taxes (100.9 ) (0.6 ) (72.1 ) 9.8 (163.8 ) (Benefit)/provision for income taxes 9.4 (4.3 ) (18.4 ) 4.6 (8.7 ) Net (loss)/earnings $ (110.3 ) $ 3.7 $ (53.7 ) $ 5.2 $ (155.1 ) (1) The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo. (2) The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation (3) The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek. (4) The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys. (5) The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt The following table presents the unaudited quarterly results for the year ended June 30, 2014 (in millions): 2014 Quarter Ended (1) September 30 December 31 (2) (3) March 31 (4) June 30 (5) Total Revenue $ 269.7 $ 278.7 $ 283.2 $ 298.1 $ 1,129.7 Operating costs and expenses Operating costs (excluding depreciation and amortization and including stock-based compensation) 79.7 85.9 84.9 92.8 343.3 Selling, general and administrative expenses (including stock-based compensation) 76.4 87.0 96.6 124.6 384.6 Depreciation and amortization 81.0 81.7 84.2 91.3 338.2 Total operating costs and expenses 237.1 254.6 265.7 308.7 1,066.1 Operating income 32.6 24.1 17.5 (10.6 ) 63.6 Other expenses Interest expense (6) (51.5 ) (50.3 ) (49.1 ) (52.6 ) (203.5 ) Loss on extinguishment of debt (7) — (1.9 ) — — (1.9 ) Foreign currency gain on intercompany loans 0.6 0.2 0.1 3.8 4.7 Other income, net 0.1 0.3 — (0.1 ) 0.3 Total other expenses, net (50.8 ) (51.7 ) (49.0 ) (48.9 ) (200.4 ) Loss from operations before income taxes (18.2 ) (27.6 ) (31.5 ) (59.5 ) (136.8 ) Provision for income taxes 9.3 8.4 12.1 10.5 40.3 Net loss $ (27.5 ) $ (36.0 ) $ (43.6 ) $ (70.0 ) $ (177.1 ) (1) The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink. (2) The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access. (3) The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink. (4) The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange. (5) The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo. (6) The Company realized an increase in interest expense during the second and fourth quarters of 2014 due to financing transactions completed to increase its borrowings under its term loan facility. See Note 8— Long-Term Debt. (7) The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

Basis of Presentation and Sig42

Basis of Presentation and Significant Accounting Policies (Narrative) (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Basis Of Presentation And Significant Accounting Policies [Line Items]
Non-current restricted cash	$ 4,800,000	$ 5,100,000
Impairment of property, plant and equipment	0	0	$ 0
Impairment of goodwill and intangibles	0	0	$ 0
Unamortized debt issuance cost	71,000,000	89,400,000
Senior Notes [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Unamortized debt issuance cost	$ 71,000,000	$ 89,400,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Major customer concentration	10.00%	10.00%	10.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Major customer concentration	10.00%	12.00%
CII [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Shares authorized	625,000,000
CII [Member] | Common Units [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Shares authorized	625,000,000
Customer relationships [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Customer relationship estimated life	16 years 3 months 18 days
Minimum [Member] | Customer relationships [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Customer relationship estimated life	10 years
Maximum [Member] | Customer relationships [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Customer relationship estimated life	20 years

Basis of Presentation and Sig43

Basis of Presentation and Significant Accounting Policies (Detail) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Jun. 30, 2015	[1]	Mar. 31, 2015	[1],[2],[3]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2015	[1]	Jun. 30, 2014		Jun. 30, 2013
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Operating costs (excluding depreciation and amortization and including stock-based compensation)	$ 107.5		$ 100.9		$ 97.8		$ 107.3		$ 92.8	[4],[5]	$ 84.9	[4],[6]	$ 85.9	[4],[7],[8]	$ 79.7	[4]	$ 413.5		$ 343.3	[4]	$ 314.1
Transfer of Zayo Professional Services									3.3		1.8		1.9		2				9
Selling, general and administrative expenses (including stock-based compensation—Note 12)	$ 86.4	[9]	$ 83	[9]	$ 32.1	[9]	$ 156.6	[9]	124.6	[4],[5]	96.6	[4],[6]	87	[4],[7],[8]	76.4	[4]	$ 358.1	[9]	384.6	[4]	$ 256.7
Transfer of Zayo Professional Services									1		1.7		1.7		1.8				6.2
Scenario, Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Operating costs (excluding depreciation and amortization and including stock-based compensation)									36.2		35.4		35		34.9				141.5
Selling, general and administrative expenses (including stock-based compensation—Note 12)									176.9		142.7		134.2		117.4				571.2
Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Operating costs (excluding depreciation and amortization and including stock-based compensation)									53.3		47.7		49		42.8				192.8
Selling, general and administrative expenses (including stock-based compensation—Note 12)									$ (53.3)		$ (47.8)		$ (48.9)		$ (42.8)				$ (192.8)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.
[9]	The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation.

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Detail) $ / shares in Units, € in Millions, £ in Millions, $ in Millions

Feb. 25, 2015USD ($)

Feb. 23, 2015USD ($)ft²DataCentreMarketMW

Jan. 06, 2015USD ($)CellularTowersBuildingsmi

Jan. 03, 2015

Jul. 03, 2014USD ($)

Jul. 03, 2014EUR (€)

May. 16, 2014USD ($)

May. 16, 2014GBP (£)

Mar. 04, 2014USD ($)

Oct. 02, 2013USD ($)

Oct. 01, 2013USD ($)

Aug. 01, 2013USD ($)shares

May. 31, 2013USD ($)

Dec. 31, 2012USD ($)

Dec. 14, 2012USD ($)

Oct. 01, 2012USD ($)

Aug. 31, 2012USD ($)

Jul. 02, 2012USD ($)$ / shares

Jun. 30, 2015USD ($)

Jun. 30, 2014USD ($)

Jun. 30, 2013USD ($)

Jun. 30, 2015USD ($)Acquisition

Jul. 01, 2014USD ($)

May. 16, 2014GBP (£)

Jun. 30, 2012

Business Acquisition [Line Items]

Number of business combinations completed | Acquisition

34

Cash paid for acquisitions, net of cash acquired

$ 855.7

$ 393.3

$ 2,480.7

Deferred Tax Assets, Net

(60.2)

8

$ (60.2)

Net operating loss carry forwards generated

1,115

1,115

Acquisition related costs

$ 5.9

4.5

14.2

Neo Telecoms [Member]

Business Acquisition [Line Items]

Acquisition date

Jul. 1, 2014

Jul. 1, 2014

Jul. 1, 2014

Business acquisition, percentage of voting interests acquired

96.00%

Cash paid for acquisitions, net of cash acquired

$ 73.9

€ 54.1

$ 73.9

Purchase price, held in escrow

$ 11.9

€ 8.7

Business acquisition percentage of non controlling interest

4.00%

Neo Telecoms [Member] | Other long-term liabilities [Member]

Business Acquisition [Line Items]

Business acquisition, fair value of noncontrolling interest

$ 2.9

Neo Telecoms [Member] | Call Option [Member]

Business Acquisition [Line Items]

Business acquisition, percentage of voting interests acquired

4.00%

Atlanta NAP [Member]

Business Acquisition [Line Items]

Acquisition date

Jul. 1, 2014

Jul. 1, 2014

Jul. 1, 2014

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 51.9

Purchase price, held in escrow

$ 5.3

Ideatek Systems, Inc., [Member]

Business Acquisition [Line Items]

Acquisition date

Jan. 1, 2015

Jan. 1, 2015

Cash paid for acquisitions, net of cash acquired

$ 52.7

$ 52.7

Purchase price, held in escrow

$ 3.2

Additional Route Miles Acquired | mi

1,800

Number Of Additional Cellular Towers connected | CellularTowers

600

Number Of Additional Building connected | Buildings

100

Latisys Holdings, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Feb. 23, 2015

Feb. 23, 2015

Cash paid for acquisitions, net of cash acquired

$ 677.5

$ 677.5

$ 677.5

Purchase price, held in escrow

$ 31.4

Number of data center | DataCentre

8

Number of market | Market

5

Acquired area in square feet | ft²

185,000

Critical power acquired | MW

33

Deferred Tax Assets, Net

$ (83.6)

(83.6)

(83.6)

Net operating loss carry forwards generated

$ 126.3

126.3

Corelink Data Centers, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Aug. 1, 2013

Aug. 1, 2013

Cash paid for acquisitions, net of cash acquired

$ 0.3

Net assets acquired

$ 1.9

Business acquisition, equity interest issued or issuable, number of shares | shares

301,949

Business acquisition, equity interest issued or issuable, value assigned

$ 1.6

Access Communications, Inc [Member]

Business Acquisition [Line Items]

Acquisition date

Oct. 1, 2013

Oct. 1, 2013

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 40.1

40.1

Purchase price, held in escrow

$ 4

Fiberlink, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Oct. 2, 2013

Oct. 2, 2013

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 43.1

43.1

CoreXchange [Member]

Business Acquisition [Line Items]

Acquisition date

Mar. 4, 2014

Apr. 3, 2014

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 17.2

$ (0.3)

17.5

Geo Networks Limited [Member]

Business Acquisition [Line Items]

Acquisition date

May 16, 2014

May 16, 2014

May 16, 2014

Business acquisition, percentage of voting interests acquired

100.00%

100.00%

Cash paid for acquisitions, net of cash acquired

$ 292.3

£ 174.3

$ 292.3

Deferred Tax Assets, Net

$ (38.2)

$ (38.2)

(38.2)

Geo Networks Limited [Member] | Note Holders Payable [Member]

Business Acquisition [Line Items]

Debt payment related to business acquisition | £

£ 113.4

Geo Networks Limited [Member] | Shareholders

Business Acquisition [Line Items]

Debt payment related to business acquisition | £

£ 69.1

Abovenet, Inc [Member]

Business Acquisition [Line Items]

Acquisition date

Jul. 2, 2012

Jul. 2, 2012

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 2,210

2,210

Share price | $ / shares

$ 84

Deferred Tax Assets, Net

$ 42.1

$ 42.1

42.1

Net operating loss carry forwards generated

$ 1,008.8

$ 1,008.8

FiberGate [Member]

Business Acquisition [Line Items]

Acquisition date

Aug. 31, 2012

Aug. 31, 2012

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 118.3

118.3

Purchase price, held in escrow

$ 17.6

American Fiber Systems Holding Corporation [Member]

Business Acquisition [Line Items]

Acquisition date

Oct. 1, 2010

USCarrier Telecom, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Oct. 1, 2012

Oct. 1, 2012

Cash paid for acquisitions, net of cash acquired

$ 16.1

16.1

USCarrier Telecom, LLC [Member] | Common Class A [Member]

Business Acquisition [Line Items]

Business acquisition, percentage of voting interests acquired

55.00%

USCarrier Telecom, LLC [Member] | Common Class B [Member]

Business Acquisition [Line Items]

Business acquisition, percentage of voting interests acquired

34.00%

First Telecom Services, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Dec. 14, 2012

Dec. 14, 2012

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 109.7

109.7

Litecast/Balticore, LLC [Member]

Business Acquisition [Line Items]

Acquisition date

Dec. 14, 2012

Dec. 31, 2012

Business acquisition, percentage of voting interests acquired

100.00%

Cash paid for acquisitions, net of cash acquired

$ 22.2

$ 22.2

22.2

Core NAP, LP [Member]

Business Acquisition [Line Items]

Acquisition date

May 31, 2013

May 31, 2013

Cash paid for acquisitions, net of cash acquired

$ 7.1

$ 7.1

Acquisitions (Schedule of Acqui

Acquisitions (Schedule of Acquisition) (Detail) € in Millions, £ in Millions, $ in Millions	Feb. 25, 2015USD ($)	Feb. 23, 2015USD ($)	Jan. 06, 2015USD ($)	Jan. 03, 2015	Jul. 03, 2014USD ($)	Jul. 03, 2014EUR (€)	May. 16, 2014USD ($)	May. 16, 2014GBP (£)	Mar. 04, 2014USD ($)	Oct. 02, 2013USD ($)	Oct. 01, 2013USD ($)	Aug. 01, 2013USD ($)	May. 31, 2013USD ($)	Dec. 31, 2012USD ($)	Dec. 14, 2012USD ($)	Oct. 01, 2012USD ($)	Aug. 31, 2012USD ($)	Jul. 02, 2012USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2013USD ($)	Jan. 01, 2015USD ($)	Jul. 01, 2014USD ($)
Business Acquisition [Line Items]
Goodwill																			$ 1,224.4	$ 866.7	$ 688.8
Net consideration paid																			$ 855.7	393.3	2,480.7
Atlanta NAP [Member]
Business Acquisition [Line Items]
Acquisition date					Jul. 1, 2014	Jul. 1, 2014													Jul. 1, 2014
Other current assets																							$ 0.2
Property and equipment																							7
Intangibles																							21
Goodwill																							25.2
Total assets acquired																							53.4
Current liabilities																							1.5
Total liabilities assumed																							1.5
Net assets acquired																							51.9
Net consideration paid					$ 51.9
Neo Telecoms [Member]
Business Acquisition [Line Items]
Acquisition date					Jul. 1, 2014	Jul. 1, 2014													Jul. 1, 2014
Cash																							4.2
Other current assets																							9.5
Property and equipment																							31.3
Intangibles																							26.4
Goodwill																							32.5
Other assets																							2.3
Total assets acquired																							106.2
Current liabilities																							13.5
Deferred revenue																							3.7
Deferred tax liability, net																							7.6
Other liabilities																							3.3
Total liabilities assumed																							28.1
Net assets acquired																							78.1
Less cash acquired																							$ (4.2)
Net consideration paid					$ 73.9	€ 54.1													$ 73.9
Ideatek Systems, Inc., [Member]
Business Acquisition [Line Items]
Acquisition date				Jan. 1, 2015															Jan. 1, 2015
Other current assets																						$ 0.8
Property and equipment																						32.3
Deferred tax assets, net																						2.9
Intangibles																						7.6
Goodwill																						38.8
Total assets acquired																						82.4
Current liabilities																						4.5
Deferred revenue																						25.2
Total liabilities assumed																						29.7
Net assets acquired																						$ 52.7
Net consideration paid			$ 52.7																$ 52.7
Latisys Holdings, LLC [Member]
Business Acquisition [Line Items]
Acquisition date	Feb. 23, 2015																		Feb. 23, 2015
Cash		$ 9.4
Other current assets		17.1
Property and equipment		222.9
Intangibles		250.2
Goodwill		279.8
Other assets		5
Total assets acquired		784.4
Current liabilities		10.7
Deferred revenue		3.2
Deferred tax liability, net		83.6
Total liabilities assumed		97.5
Net assets acquired		686.9
Less cash acquired		(9.4)
Net consideration paid	$ 677.5	$ 677.5																	$ 677.5
Corelink Data Centers, LLC [Member]
Business Acquisition [Line Items]
Acquisition date												Aug. 1, 2013							Aug. 1, 2013
Cash												$ 0.1
Other current assets												0.5
Property and equipment												15.9
Intangibles												0.2
Goodwill												2.9
Other assets												0.5
Total assets acquired												20.1
Current liabilities												0.7
Deferred revenue												0.2
Capital lease obligations												14.2
Deferred tax liability, net												3
Total liabilities assumed												18.1
Net assets acquired												2
Less cash acquired												(0.1)
Net consideration paid												0.3
Net consideration paid												$ 1.9
Access Communications, Inc [Member]
Business Acquisition [Line Items]
Acquisition date											Oct. 1, 2013								Oct. 1, 2013
Cash											$ 1.2
Other current assets											2.3
Property and equipment											11.5
Intangibles											18
Goodwill											24
Total assets acquired											57
Current liabilities											1
Deferred revenue											5.1
Deferred tax liability, net											9.6
Total liabilities assumed											15.7
Net assets acquired											41.3
Less cash acquired											(1.2)
Net consideration paid											$ 40.1									40.1
Fiberlink, LLC [Member]
Business Acquisition [Line Items]
Acquisition date										Oct. 2, 2013									Oct. 2, 2013
Other current assets										$ 0.8
Property and equipment										15.9
Deferred tax assets, net										7.7
Intangibles										19.3
Goodwill										19.8
Other assets										0.1
Total assets acquired										63.6
Current liabilities										1.3
Deferred revenue										19.2
Total liabilities assumed										20.5
Net assets acquired										43.1
Net consideration paid										$ 43.1										43.1
CoreXchange [Member]
Business Acquisition [Line Items]
Acquisition date									Mar. 4, 2014										Apr. 3, 2014
Other current assets									$ 0.6
Property and equipment									3.1
Deferred tax assets, net									0.2
Intangibles									11
Goodwill									3.4
Total assets acquired									18.3
Current liabilities									0.5
Deferred revenue									0.4
Capital lease obligations									0.2
Total liabilities assumed									1.1
Net assets acquired									17.2
Net consideration paid									$ 17.2										$ (0.3)	17.5
Geo Networks Limited [Member]
Business Acquisition [Line Items]
Acquisition date							May 16, 2014	May 16, 2014											May 16, 2014
Cash							$ 13.7
Other current assets							8.8
Property and equipment							220.4
Intangibles							60.8
Goodwill							113.8
Other assets							9.8
Total assets acquired							427.3
Current liabilities							34.8
Deferred revenue							45.1
Deferred tax liability, net							38.2
Other liabilities							3.2
Total liabilities assumed							121.3
Net assets acquired							306
Less cash acquired							(13.7)
Net consideration paid							$ 292.3	£ 174.3												$ 292.3
Abovenet, Inc [Member]
Business Acquisition [Line Items]
Acquisition date																		Jul. 2, 2012	Jul. 2, 2012
Cash																		$ 141.6
Other current assets																		46.5
Property and equipment																		1,477.3
Deferred tax assets, net																		42.1
Intangibles																		480.4
Goodwill																		381.6
Other assets																		12.6
Total assets acquired																		2,582.1
Current liabilities																		78.4
Deferred revenue																		146
Other liabilities																		6.1
Total liabilities assumed																		230.5
Net assets acquired																		2,351.6
Less cash acquired																		(141.6)
Net consideration paid																		$ 2,210			2,210
FiberGate [Member]
Business Acquisition [Line Items]
Acquisition date																	Aug. 31, 2012		Aug. 31, 2012
Cash																	$ 2.3
Other current assets																	4.9
Property and equipment																	59
Intangibles																	35.9
Goodwill																	53.8
Total assets acquired																	155.9
Current liabilities																	1.5
Deferred revenue																	2.5
Deferred tax liability, net																	31.3
Total liabilities assumed																	35.3
Net assets acquired																	120.6
Less cash acquired																	(2.3)
Net consideration paid																	$ 118.3				118.3
USCarrier Telecom, LLC [Member]
Business Acquisition [Line Items]
Acquisition date																Oct. 1, 2012			Oct. 1, 2012
Other current assets																$ 1.3
Property and equipment																19.4
Deferred tax assets, net																2
Intangibles																6.8
Goodwill																5.4
Total assets acquired																34.9
Current liabilities																3.7
Deferred revenue																2.2
Total liabilities assumed																5.9
Net assets acquired																28.9
Cost method investment in USCarrier																(12.8)
Net consideration paid																$ 16.1					16.1
First Telecom Services, LLC [Member]
Business Acquisition [Line Items]
Acquisition date															Dec. 14, 2012				Dec. 14, 2012
Other current assets															$ 5.9
Property and equipment															63.5
Deferred tax assets, net															19.2
Intangibles															17.1
Goodwill															48.4
Other assets															0.1
Total assets acquired															154.2
Current liabilities															4.6
Deferred revenue															39.9
Total liabilities assumed															44.5
Net assets acquired															109.7
Net consideration paid															$ 109.7						109.7
Litecast/Balticore, LLC [Member]
Business Acquisition [Line Items]
Acquisition date															Dec. 14, 2012				Dec. 31, 2012
Other current assets															$ 0.3
Property and equipment															0.4
Intangibles															12.5
Goodwill															9.9
Total assets acquired															23.1
Current liabilities															0.2
Deferred revenue															0.7
Total liabilities assumed															0.9
Net assets acquired															22.2
Net consideration paid														$ 22.2	$ 22.2						22.2
Core NAP, LP [Member]
Business Acquisition [Line Items]
Acquisition date													May 31, 2013						May 31, 2013
Other current assets													$ 0.2
Property and equipment													2.5
Intangibles													4.1
Goodwill													1
Total assets acquired													7.8
Current liabilities													0.5
Other liabilities													0.2
Total liabilities assumed													0.7
Net assets acquired													7.1
Net consideration paid													$ 7.1								$ 7.1

Acquisitions (Schedule of Defer

Acquisitions (Schedule of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Feb. 23, 2015	Jun. 30, 2014	May. 16, 2014	Jul. 02, 2012
Deferred income tax assets:
Net operating loss carryforwards	$ 434		$ 415.6
Deferred revenue	243.5		190.7
Allowance for doubtful accounts	10.2		6.4
Other	17.4		2.1
Total deferred income tax assets	755.8		651.1
Deferred income tax liabilities:
Property and equipment	(468.9)		(374.4)
Intangible assets	(327.2)		(239.3)
Total deferred income tax liabilities	(814.9)		(640.9)
Net deferred income tax assets/(liabilities)	(60.2)		$ 8
Latisys Holdings, LLC [Member]
Deferred income tax assets:
Net operating loss carryforwards		$ 49.9
Deferred revenue		1.1
Accrued expenses		0.1
Allowance for doubtful accounts		0.3
Other		0.4
Total deferred income tax assets		51.8
Deferred income tax liabilities:
Property and equipment		(42.3)
Intangible assets		(93.1)
Total deferred income tax liabilities		(135.4)
Net deferred income tax assets/(liabilities)	(83.6)	$ (83.6)
Geo Networks Limited [Member]
Deferred income tax assets:
Net operating loss carryforwards				$ 2.5
Deferred revenue				4.4
Total deferred income tax assets				6.9
Deferred income tax liabilities:
Property and equipment				(32.9)
Intangible assets				(12.2)
Total deferred income tax liabilities				(45.1)
Net deferred income tax assets/(liabilities)	(38.2)			$ (38.2)
Abovenet, Inc [Member]
Deferred income tax assets:
Net operating loss carryforwards					$ 405.3
Deferred revenue					49.1
Accrued expenses					12.2
Allowance for doubtful accounts					2.5
Total deferred income tax assets					469.1
Deferred income tax liabilities:
Property and equipment					(250)
Intangible assets					(177)
Total deferred income tax liabilities					(427)
Net deferred income tax assets/(liabilities)	$ 42.1				$ 42.1

Acquisitions (Schedule of Finan

Acquisitions (Schedule of Financial Statement Caption Impacted by the Purchase Accounting Adjustments) (Detail) - USD ($) $ in Millions		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
Current assets
Trade receivables, net		$ 88				$ 57.2
Prepaid expenses		37.3				24.9
Total current assets		567.3				543.8
Property and equipment, net		3,299.2				2,822.4
Intangible assets, net		948.3				710.3
Goodwill		1,224.4				866.7	$ 688.8
Other assets		54.8				37.7
Total assets		6,094	$ 5,886.2	$ 4,988.8	$ 4,972.9	4,980.9	$ 4,152.1
Current liabilities
Accounts payable		40				26.7
Accrued liabilities		182.4				172.3
Total current liabilities		388.4				354.4
Capital lease obligation, non-current		28.3				25.7
Deferred revenue, non-current		612.7				501.5
Deferred income taxes, net		189.7				153
Total liabilities		$ 4,899.9				4,579.6
Adjusted Balance [Member]
Current assets
Trade receivables, net						57.2
Prepaid expenses						24.9
Deferred income taxes, net						161
Total current assets						243.1
Property and equipment, net						2,822.4
Intangible assets, net						710.3
Goodwill						866.7
Other assets						37.7
Total assets						4,680.2
Current liabilities
Accounts payable						26.7
Accrued liabilities						172.3
Total current liabilities						199
Capital lease obligation, non-current						25.7
Deferred revenue, non-current						501.5
Deferred income taxes, net						153
Total liabilities						879.2
Previously Reported Balance [Member]
Current assets
Trade receivables, net	[1]					59
Prepaid expenses	[1]					25.6
Deferred income taxes, net	[1]					160.4
Total current assets	[1]					245
Property and equipment, net	[1]					2,821.4
Intangible assets, net	[1]					709.7
Goodwill	[1]					845.3
Other assets	[1]					37.8
Total assets	[1]					4,659.2
Current liabilities
Accounts payable	[1]					27
Accrued liabilities	[1]					159.6
Total current liabilities	[1]					186.6
Capital lease obligation, non-current	[1]					22.9
Deferred revenue, non-current	[1]					496.9
Deferred income taxes, net	[1]					151.8
Total liabilities	[1]					858.2
Purchase Accounting Adjustment [Member]
Current assets
Trade receivables, net						(1.8)
Prepaid expenses						(0.7)
Deferred income taxes, net						0.6
Total current assets						(1.9)
Property and equipment, net						1
Intangible assets, net						0.6
Goodwill						21.4
Other assets						(0.1)
Total assets						21
Current liabilities
Accounts payable						(0.3)
Accrued liabilities						12.7
Total current liabilities						12.4
Capital lease obligation, non-current						2.8
Deferred revenue, non-current						4.6
Deferred income taxes, net						1.2
Total liabilities						$ 21
[1]	As reported on Form 10-Q filed with the SEC on May 13, 2015

Acquisitions (Schedule of Pro-F

Acquisitions (Schedule of Pro-Forma Financial Information) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Business Combinations [Abstract]
Revenue	$ 1,420.2	$ 1,329.6
Net loss	$ (182.4)	$ (221.5)

Property and Equipment (Schedul

Property and Equipment (Schedule of Property and Equipment) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,290.1	$ 3,560.1
Less accumulated depreciation	(990.9)	(737.7)
Property and equipment, net	3,299.2	2,822.4
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16.2	0.7
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 109.2	64.7
Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	15 years
Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	20 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5.1	5.7
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	7 years
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 15.1	16.7
Computer Hardware [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Computer Hardware [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8.3	9.3
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 272.1	94.9
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	7 years
Fiber Optic Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 623.3	583.7
Fiber Optic Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	8 years
Circuit Switch Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 12.1	11.8
Circuit Switch Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	10 years
Packet Switch Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 76.2	62.8
Packet Switch Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	5 years
Fiber Optic Network [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,715.4	2,450.8
Fiber Optic Network [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	15 years
Fiber Optic Network [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life in years	20 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 437.1	$ 259

Property and Equipment (Narrati

Property and Equipment (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Property Plant And Equipment [Abstract]
Depreciation expense	$ 351.4	$ 294.2	$ 280.1
Capitalized interest	12.5	12.6	13
Capitalized labor costs included in fixed assets	58.3	$ 42.7	$ 28.6
Wrote-off of depreciated property and equipment	$ 93.4

Goodwill (Narrative) (Detail)

Goodwill (Narrative) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 1,224.4	$ 866.7	$ 688.8

Goodwill (Schedule Of Goodwill)

Goodwill (Schedule Of Goodwill) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Line Items]
Goodwill, beginning Balance	$ 866.7	$ 688.8
Fiscal Acquisitions	376.3	163.9
Foreign Currency Translation and Other	(18.6)	14
Goodwill, ending balance	1,224.4	866.7
Dark Fiber [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	293.3	193.3
Fiscal Acquisitions	16	97.4
Foreign Currency Translation and Other	(10.2)	2.6
Goodwill, ending balance	299.1	293.3
Waves [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	269	215.9
Fiscal Acquisitions	1.4	49.6
Foreign Currency Translation and Other	(4.8)	3.5
Goodwill, ending balance	265.6	269
Sonet [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	50.3	50.3
Fiscal Acquisitions	0	0
Foreign Currency Translation and Other	0	0
Goodwill, ending balance	50.3	50.3
Ethernet [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	96.7	91.7
Fiscal Acquisitions	8.2	4.9
Foreign Currency Translation and Other	(0.7)	0.1
Goodwill, ending balance	104.2	96.7
IP [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	80.5	80.1
Fiscal Acquisitions	6.8	0.2
Foreign Currency Translation and Other	(1)	0.2
Goodwill, ending balance	86.3	80.5
MIG [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	43.7	38.3
Fiscal Acquisitions	29.8	5.4
Foreign Currency Translation and Other	(0.1)
Goodwill, ending balance	73.4	43.7
zColo [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	18.6	11.9
Fiscal Acquisitions	256	6.4
Foreign Currency Translation and Other	(1.4)	0.3
Goodwill, ending balance	273.2	18.6
Cloud [Member]
Goodwill [Line Items]
Fiscal Acquisitions	57.2
Foreign Currency Translation and Other	(0.2)
Goodwill, ending balance	57
Other [Member]
Goodwill [Line Items]
Goodwill, beginning Balance	14.6	7.3
Fiscal Acquisitions	0.9
Foreign Currency Translation and Other	(0.2)	7.3
Goodwill, ending balance	$ 15.3	$ 14.6

Intangible Assets (Schedule of

Intangible Assets (Schedule of Identifiable Acquisition Related Intangible Assets) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,082.2	$ 791.1
Accumulated Amortization	(155.3)	(103.7)
Total Net	926.9	687.4
Intangible Assets, Gross (Excluding Goodwill)	1,103.6	814
Intangible Assets, Net	948.3	710.3
Certifications [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount, Indefinite-lived Intangibles	3.5	3.5
Easement indefinite [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount, Indefinite-lived Intangibles	17.9	19.4
Customer relationships [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	1,080.3	789.2
Accumulated Amortization	(155)	(103.6)
Total Net	925.3	685.6
Trade names [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	0.2	0.1
Accumulated Amortization	(0.1)
Total Net	0.1	0.1
Underlying rights [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	1.7	1.8
Accumulated Amortization	(0.2)	(0.1)
Total Net	$ 1.5	$ 1.7

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Acquired Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 54.8	$ 44	$ 44.4
Amortized intangible assets write off	$ 3.5	$ 27.2
Customer relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Customer relationship estimated life	16 years 3 months 18 days
Trade names [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Customer relationship estimated life	1 year
Underlying rights [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Customer relationship estimated life	20 years

Intangible Assets (Schedule o55

Intangible Assets (Schedule of Estimated Future Amortization Of Intangible Assets) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Intangible Assets Net Excluding Goodwill [Abstract]
2,016	$ 66.3
2,017	66.2
2,018	66.2
2,019	66.2
2,020	62.6
Thereafter	599.4
Total Net	$ 926.9	$ 687.4

Long-Term Debt (Summary of Long

Long-Term Debt (Summary of Long-Term Debt) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	May. 06, 2015	Jun. 30, 2014	Jul. 02, 2012
Debt Instrument [Line Items]
Debt obligations	$ 3,752.4		$ 3,260.8
Unamortized debt issuance costs	(71)		(89.4)
Carrying value of debt	3,668.7		3,150.8
Less current portion	(16.5)		(20.5)
Long-term debt, less current portion	3,652.2		3,130.3
Term Loan Facility due 2021 [Member]
Debt Instrument [Line Items]
Debt obligations	1,646.8		2,010.8
Unamortized discount on Term Loan Facility	(19.8)		(20.6)	$ (30)
Carrying value of debt	1,627		1,990.2
Secured Debt [Member] | 8.125% Senior First Priority Notes due 2020 [Member]
Debt Instrument [Line Items]
Debt obligations			750
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unamortized premium on 6.00% Senior Unsecured Notes	7.1
Unsecured Debt [Member] | 10.125% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Debt obligations	325.6		$ 500
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt obligations	1,430
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt obligations	$ 350	$ 344.5

Long-Term Debt (Summary of Lo57

Long-Term Debt (Summary of Long-Term Debt) (Parenthetical) (Detail)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Mar. 09, 2015
Secured Debt [Member] | 8.125% Senior First Priority Notes due 2020 [Member]
Debt Instrument [Line Items]
Interest rate	8.125%	8.125%
Maturity date	2,020	2,020
Unsecured Debt [Member] | 10.125% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Interest rate	10.125%	10.125%
Maturity date	2,020	2,020
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Interest rate	6.00%	6.00%	6.00%
Maturity date	2,023	2,023
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Interest rate	6.375%	6.375%
Maturity date	2,025	2,025
Term Loan Facility due 2021 [Member]
Debt Instrument [Line Items]
Maturity date	2,021	2,021

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Detail) - USD ($)

May. 06, 2015

Apr. 17, 2015

Dec. 15, 2014

May. 16, 2014

Nov. 26, 2013

Oct. 05, 2012

Jul. 02, 2012

Jun. 30, 2015

Mar. 31, 2015

[1],[2],[3],[4]

Dec. 31, 2014

Dec. 31, 2013

[5],[6],[7],[8]

Jun. 30, 2015

Jun. 30, 2014

Jun. 30, 2013

Mar. 09, 2015

Jan. 23, 2015

Aug. 13, 2012

Debt Instrument [Line Items]

Loss on extinguishment of debt

$ (65,000,000)

$ (8,500,000)

[1],[2]

$ (54,900,000)

$ (30,900,000)

[1],[2]

$ (1,900,000)

$ (94,300,000)

[1],[2]

$ (1,900,000)

[5],[6]

$ (77,300,000)

Payment of early redemption fees on debt extinguished

62,600,000

72,100,000

Write-off of unamortized debt issuance costs

17,000,000

Debt issuance cost

99,300,000

Proceeds from debt

1,787,300,000

423,600,000

3,189,300,000

Redemption of notes

1,288,500,000

18,000,000

1,058,600,000

Redemption premium

23,800,000

Outstanding letters of credit

9,200,000

9,200,000

Debt obligations

3,752,400,000

3,752,400,000

3,260,800,000

Outstanding letters of credit

9,200,000

9,200,000

Unamortized debt issuance cost

71,000,000

71,000,000

89,400,000

Accumulated amortization

28,300,000

28,300,000

25,400,000

Unamortized debt issuance related interest

$ 13,900,000

13,900,000

11,500,000

Interest Rate Swap [Member]

Debt Instrument [Line Items]

Notional amount of derivative

$ 750,000,000

Derivative, maturity date

Jun. 30, 2017

Derivative, fixed interest rate

1.67%

Derivative, floor rate

1.25%

Change in fair value of interest rate swap

$ 2,100,000

4,600,000

2,600,000

Interest Rate Derivative Liabilities, at Fair Value

4,100,000

4,100,000

$ 2,000,000

Early Redemption Fees [Member]

Debt Instrument [Line Items]

Payment of early redemption fees on debt extinguished

39,800,000

Second Amendment [Member]

Debt Instrument [Line Items]

Loss on extinguishment of debt

(900,000)

Debt issuance cost

15,300,000

Fourth Amendment [Member]

Debt Instrument [Line Items]

Loss on extinguishment of debt

(1,100,000)

Debt issuance cost

15,000,000

Second And Fourth Amendment [Member]

Debt Instrument [Line Items]

Payment of early redemption fees on debt extinguished

12,200,000

Fifth Amendment [Member]

Debt Instrument [Line Items]

Loss on extinguishment of debt

(1,900,000)

Debt issuance cost

1,500,000

6.00% Senior Notes due 2023 [Member]

Debt Instrument [Line Items]

Proceeds from debt

$ 1,437,300,000

January Notes Offering [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 700,000,000

March Notes Offering [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 730,000,000

Debt Instrument Issuance At Premium Price Percentage

1.00%

Premium on debt being accreted

$ 7,300,000

$ 7,300,000

Seventh Amendment [Member]

Debt Instrument [Line Items]

Outstanding letters of credit

$ 30,000,000

Outstanding letters of credit increased

50,000,000

Revolver [Member]

Debt Instrument [Line Items]

Percentage of excess revolver committed to debt payments

35.00%

Senior Secured Term Loan Facility [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

1,620,000,000

Senior Secured Term Loan Facility [Member] | Sixth Amendment [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 2,015,900,000

Discount on debt

1,400,000

Debt issuance cost

3,200,000

Proceeds from debt

$ 275,000,000

Increase in price, percentage

99.50%

Senior Secured Term Loan Facility [Member] | Sixth Amendment [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

3.00%

Senior Secured Term Loan Facility [Member] | Sixth Amendment [Member] | LIBOR [Member] | Minimum [Member]

Debt Instrument [Line Items]

Revolver interest rate

1.00%

Term Loan Facility [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

3.50%

Term Loan Facility [Member] | Second Amendment [Member]

Debt Instrument [Line Items]

Floor rate

5.25%

Interest rate decrease (basis point)

(1.875%)

Call premiums

$ 16,200,000

Term Loan Facility [Member] | Second Amendment [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

4.00%

Term Loan Facility [Member] | Fourth Amendment [Member]

Debt Instrument [Line Items]

Interest rate decrease (basis point)

(0.50%)

Call premiums

$ 16,100,000

Term Loan Facility [Member] | Fourth Amendment [Member] | Minimum [Member]

Debt Instrument [Line Items]

Interest rate decrease (basis point)

(0.25%)

Original Revolver [Member] | Interest Rate Floor [Member]

Debt Instrument [Line Items]

Interest rate

4.50%

4.50%

Original Revolver [Member] | Fourth Amendment [Member]

Debt Instrument [Line Items]

Interest rate decrease (basis point)

(0.50%)

Original Revolver [Member] | Fourth Amendment [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

3.00%

Standby Letter Of Credit [Member]

Debt Instrument [Line Items]

Unused commitment, percentage

0.25%

2020 Secured Notes [Member] | Revolver [Member] | 8.125% Senior First Priority Notes due 2020 [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 750,000,000

Interest rate

8.125%

Maturity date

2,020

2020 Unsecured Notes [Member] | 8.125% Senior First Priority Notes due 2020 [Member] | Second Note Redemption [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

105.063%

2020 Unsecured Notes [Member] | 10.125% Senior Notes due 2020 [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 500,000,000

Interest rate

10.125%

Maturity date

2,020

Credit Agreement [Member]

Debt Instrument [Line Items]

Percentage of effective interest rate

3.75%

3.75%

Credit Agreement [Member] | Senior Secured Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit facility maximum borrowing capacity

$ 250,000,000

Credit Agreement [Member] | Fourth Amendment [Member]

Debt Instrument [Line Items]

Interest rate decrease (basis point)

(0.50%)

Credit Agreement [Member] | Revolver [Member]

Debt Instrument [Line Items]

Percentage of effective interest rate

3.00%

3.00%

Term Loan Facility due 2021 [Member]

Debt Instrument [Line Items]

Maturity date

2,021

2,021

Discount on debt

30,000,000

$ 19,800,000

$ 19,800,000

$ 20,600,000

Payment towards principal

$ 5,100,000

Percentage of excess cash flows committed to debt payments

50.00%

Line of credit facility maturity date

Jul. 31, 2019

Write-off of unamortized debt issuance costs

(8,200,000)

Debt obligations

$ 1,646,800,000

$ 1,646,800,000

$ 2,010,800,000

Term Loan Facility due 2021 [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

2.75%

Term Loan Facility due 2021 [Member] | Fifth Amendment [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 1,749,800,000

Payment of early redemption fees on debt extinguished

(1,000,000)

Write-off of unamortized debt issuance costs

$ (900,000)

Proceeds from debt

$ 150,000,000

Term Loan Facility due 2021 [Member] | Fifth Amendment [Member] | LIBOR [Member] | Minimum [Member]

Debt Instrument [Line Items]

Revolver interest rate

1.00%

Term Loan Facility due 2021 [Member] | Fifth Amendment [Member] | LIBOR [Member] | Maximum [Member]

Debt Instrument [Line Items]

Revolver interest rate

3.00%

Secured Debt [Member]

Debt Instrument [Line Items]

Redemption of notes

$ 75,000,000

Secured Debt [Member] | December 15, 2014 [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

108.125%

Secured Debt [Member] | 8.125% Senior First Priority Notes due 2020 [Member]

Debt Instrument [Line Items]

Interest rate

8.125%

8.125%

8.125%

Maturity date

2,020

2,020

Redemption of notes

$ 675,000,000

Redemption premium

$ 38,800,000

Debt obligations

$ 750,000,000

Secured Debt [Member] | 8.125% Senior First Priority Notes due 2020 [Member] | Second Note Redemption [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

105.75%

Secured Debt [Member] | Revolver [Member]

Debt Instrument [Line Items]

Outstanding letters of credit

$ 0

$ 0

Available borrowing capacity

440,800,000

$ 440,800,000

Debt instrument, maturity date

Jan. 31, 2020

Secured Debt [Member] | Revolver [Member] | Minimum [Member]

Debt Instrument [Line Items]

Unused commitment, percentage

0.25%

Secured Debt [Member] | Revolver [Member] | Maximum [Member]

Debt Instrument [Line Items]

Unused commitment, percentage

0.375%

Secured Debt [Member] | Revolver [Member] | LIBOR [Member] | Minimum [Member]

Debt Instrument [Line Items]

Revolver interest rate

2.00%

Secured Debt [Member] | Revolver [Member] | LIBOR [Member] | Maximum [Member]

Debt Instrument [Line Items]

Revolver interest rate

3.00%

Secured Debt [Member] | Revolver [Member] | Fourth Amendment [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

2.75%

Secured Debt [Member] | Revolver [Member] | Fifth Amendment [Member]

Debt Instrument [Line Items]

Interest rate decrease (basis point)

(0.25%)

Secured Debt [Member] | Revolver [Member] | Seventh Amendment [Member]

Debt Instrument [Line Items]

Line of credit facility maximum borrowing capacity

$ 200,000,000

$ 450,000,000

Line of credit facility maturity date

Jul. 2, 2020

Unsecured Debt [Member]

Debt Instrument [Line Items]

Redemption of notes

$ 174,400,000

Premium on debt being accreted

$ 7,100,000

$ 7,100,000

Unsecured Debt [Member] | December 15, 2014 [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

110.125%

Unsecured Debt [Member] | 10.125% Senior Notes due 2020 [Member]

Debt Instrument [Line Items]

Interest rate

10.125%

10.125%

10.125%

Maturity date

2,020

2,020

Debt obligations

$ 325,600,000

$ 325,600,000

$ 500,000,000

Secured debt ratio

4.50

4.50

Total indebtedness ratio

525.00%

525.00%

Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member]

Debt Instrument [Line Items]

Interest rate

6.00%

6.00%

6.00%

6.00%

Maturity date

2,023

2,023

Line of credit facility maturity date

Apr. 1, 2023

Debt obligations

$ 1,430,000,000

$ 1,430,000,000

Secured debt ratio

4.50

4.50

Total indebtedness ratio

600.00%

600.00%

Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | December 15, 2014 [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

100.00%

Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | Second Note Redemption [Member]

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

104.50%

Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 350,000,000

Interest rate

6.375%

6.375%

6.375%

Maturity date

2,025

2,025

Line of credit facility maturity date

May 15, 2025

Loss on extinguishment of debt

$ (8,400,000)

Revolver interest rate

6.375%

Debt obligations

$ 344,500,000

$ 350,000,000

$ 350,000,000

Secured debt ratio

4.50

4.50

Total indebtedness ratio

600.00%

600.00%

Term Loan Facility [Member] | Amendment and Restatement Agreement [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Revolver interest rate

2.75%

Interest rate decrease (basis point)

(0.25%)

Term Loan Facility [Member] | Amendment and Restatement Agreement [Member] | LIBOR [Member] | Minimum [Member]

Debt Instrument [Line Items]

Revolver interest rate

1.00%

Unamortized Debt Discount

Debt Instrument [Line Items]

Loss on extinguishment of debt

$ (23,200,000)

$ (700,000)

$ (42,300,000)

[1]

The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.

[2]

The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.

[3]

The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.

[4]

The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.

[5]

The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

[6]

The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[7]

The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.

[8]

The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Long-Term Debt (Redemption Righ

Long-Term Debt (Redemption Rights) (Detail)	12 Months Ended
	Jun. 30, 2015
2020 Unsecured Notes [Member] | 8.125% Senior First Priority Notes due 2020 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Redemption price	105.063%
2020 Unsecured Notes [Member] | 8.125% Senior First Priority Notes due 2020 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Redemption price	102.531%
2020 Unsecured Notes [Member] | 8.125% Senior First Priority Notes due 2020 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Redemption price	100.00%
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Redemption price	104.50%
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Redemption price	103.00%
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Redemption price	101.50%
Unsecured Debt [Member] | 6.00% Senior Notes due 2023 [Member] | Debt Instrument, Redemption, Period Fourth And There After [Member]
Debt Instrument [Line Items]
Redemption price	100.00%
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member] | Debt Instrument Redemption Period Fifth
Debt Instrument [Line Items]
Redemption price	103.188%
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member] | Debt Instrument Redemption Period Sixth
Debt Instrument [Line Items]
Redemption price	102.125%
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member] | Debt Instrument Redemption Period Seven
Debt Instrument [Line Items]
Redemption price	101.063%
Unsecured Debt [Member] | 6.375% Senior Notes due 2025 [Member] | Debt Instrument Redemption Period Seventh And There After
Debt Instrument [Line Items]
Redemption price	100.00%

Long-Term Debt (Schedule of Fut

Long-Term Debt (Schedule of Future Contractual Maturities of Long-term Debt) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Debt Disclosure [Abstract]
2,016	$ 16.5
2,017	16.5
2,018	16.5
2,019	16.5
2,020	16.5
Thereafter	3,669.9
Total	$ 3,752.4	$ 3,260.8

Income Taxes (Summary of (Benef

Income Taxes (Summary of (Benefit)/Provision for Income Taxes from Operations) (Detail) - USD ($) $ in Millions

3 Months Ended

12 Months Ended

Jun. 30, 2015

[1]

Mar. 31, 2015

[1],[2],[3]

Dec. 31, 2014

[1]

Sep. 30, 2014

[1]

Jun. 30, 2014

[4],[5]

Mar. 31, 2014

[4],[6]

Dec. 31, 2013

[4],[7],[8]

Sep. 30, 2013

[4]

Jun. 30, 2015

Jun. 30, 2014

Jun. 30, 2013

Current Income Taxes

Federal income taxes – current

$ 1.7

$ 6.3

State income taxes – current

4.4

3.8

$ 1.7

Foreign income taxes- current

(1.6)

3.3

Current Income Tax Expense (Benefit), Total

4.5

13.4

1.7

Deferred Income Taxes

Federal income taxes – deferred

(8.6)

26.3

(23.5)

State income taxes – deferred

(6.9)

1.2

(3.5)

Foreign income taxes deferred

2.3

(0.6)

3.5

Deferred Income Tax Expense (Benefit), Total

(13.2)

26.9

(23.5)

Total (benefit)/provision for income taxes

$ 4.6

$ (18.4)

$ (4.3)

$ 9.4

$ 10.5

$ 12.1

$ 8.4

$ 9.3

$ (8.7)

[1]

$ 40.3

[4]

$ (21.8)

[1]

The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.

[2]

The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.

[3]

The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.

[4]

The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[5]

The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.

[6]

The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.

[7]

The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.

[8]

The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Income Taxes Income_(Loss) from

Income Taxes Income/(Loss) from Operations Before Income Tax) (Detail) - USD ($) $ in Millions

3 Months Ended

12 Months Ended

Jun. 30, 2015

[1]

Mar. 31, 2015

[1],[2],[3]

Dec. 31, 2014

[1]

Sep. 30, 2014

[1]

Jun. 30, 2014

[4],[5]

Mar. 31, 2014

[4],[6]

Dec. 31, 2013

[4],[7],[8]

Sep. 30, 2013

[4]

Jun. 30, 2015

Jun. 30, 2014

Jun. 30, 2013

Income Tax Disclosure [Abstract]

United States

$ (159.4)

$ (127.8)

$ (179.5)

Foreign

(4.4)

(9)

15.8

Loss before income taxes

$ 9.8

$ (72.1)

$ (0.6)

$ (100.9)

$ (59.5)

$ (31.5)

$ (27.6)

$ (18.2)

$ (163.8)

[1]

$ (136.8)

[4]

$ (163.7)

[1]

The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.

[2]

The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.

[3]

The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.

[4]

The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[5]

The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.

[6]

The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.

[7]

The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.

[8]

The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Income Taxes (Reconciliations o

Income Taxes (Reconciliations of Actual Income Tax Provision and Tax Computed by Applying United States Federal Rate to Earnings Before Income Taxes) (Detail) - USD ($) $ in Millions

3 Months Ended

12 Months Ended

Jun. 30, 2015

[1]

Mar. 31, 2015

[1],[2],[3]

Dec. 31, 2014

[1]

Sep. 30, 2014

[1]

Jun. 30, 2014

[4],[5]

Mar. 31, 2014

[4],[6]

Dec. 31, 2013

[4],[7],[8]

Sep. 30, 2013

[4]

Jun. 30, 2015

Jun. 30, 2014

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Expected benefit/provision at the statutory rate

$ (57.3)

$ (47.9)

$ (57.1)

Non-deductible stock-based compensation

59.4

96.5

35.6

State income taxes benefit, net of federal benefit

(7.4)

(6.3)

(1.9)

Transactions costs not deductible for tax purposes

0.7

0.8

1.3

Reversal of uncertain tax positions, net

(2.6)

State NOL adjustment

2.8

Change in effective tax rate

(2.2)

(0.3)

Change in valuation allowance

1.3

Foreign tax rate differential

0.6

1

(2.3)

Other, net

(2.5)

(2.2)

(0.2)

Total (benefit)/provision for income taxes

$ 4.6

$ (18.4)

$ (4.3)

$ 9.4

$ 10.5

$ 12.1

$ 8.4

$ 9.3

$ (8.7)

[1]

$ 40.3

[4]

$ (21.8)

[1]

The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.

[2]

The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.

[3]

The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.

[4]

The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[5]

The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.

[6]

The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.

[7]

The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.

[8]

The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Deferred income tax assets
Net operating loss carry forwards	$ 434	$ 415.6
Alternate minimum tax credit carryforwards	8.4	6.3
Deferred revenue	243.5	190.7
Accrued expenses	27.9	22.4
Other liabilities	14.4	7.6
Reserves against accounts receivable	10.2	6.4
Other	17.4	2.1
Total deferred income tax assets	755.8	651.1
Valuation allowance	(1.1)	(2.2)
Net deferred tax assets	754.7	648.9
Deferred income tax liabilities
Property and equipment	468.9	374.4
Intangible assets	327.2	239.3
Debt issuance costs	18.8	27.2
Total deferred income tax liabilities	814.9	640.9
Net deferred income tax assets/(liabilities)	$ (60.2)	$ 8

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2016
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards generated	$ 1,115
Net operating loss expected annual utilization	95.9
Current annual net operating loss usage	485.9
Release of accrual for uncertain tax position	2.6
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards generated	11.6
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards generated	$ 38.7
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards, expiration year	2,020
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards, expiration year	2,032
Scenario, Forecast [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards generated		$ 185.9

Income Taxes (Schedule of Unrec

Income Taxes (Schedule of Unrecognized Tax Benefits Rollforward) (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2015USD ($)
Income Tax Disclosure [Abstract]
Balance, beginning of year	$ 6.4
Decreases	$ (6.4)

Accrued Liabilities (Schedule o

Accrued Liabilities (Schedule of Accrued Liabilities) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Accrued Liabilities, Current [Abstract]
Accrued compensation and benefits	$ 19.4	$ 13.3
Accrued property and equipment purchases	54.7	46.2
Network expense accruals	77.2	79.2
Other accrued taxes	12.7	9.3
Accrued professional fees	3.4	3.9
Other accruals	15	20.4
Total	$ 182.4	$ 172.3

Equity (Narrative) (Detail)

Equity (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Stockholders Equity Note [Line Items]
Capital (distributed)/contributed (non-cash)		$ 385	$ 5.6	$ 344
Member's equity decrease during the year			$ 6	$ 5.3
Corelink [Member]
Stockholders Equity Note [Line Items]
Business acquisition, equity interest issued or issuable, number of shares	301,949
Business acquisition, equity interest issued or issuable, value assigned	$ 1.6

Stock-Based Compensation (Summa

Stock-Based Compensation (Summary of Stock-based Compensation Expense Liability and Equity Classified Awards Included in Consolidated Statements of Operations) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 200.7	$ 253.7	$ 105.8
Operating Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	23.3	20.2	7.7
Selling, General and Administrative Expenses [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	177.4	233.5	98.1
Part A Restricted Stock Units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	12.6
Part B Restricted Stock Units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	31.3
CII [Member] | Common Units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	156.4	253.3	104.9
CII [Member] | Preferred Units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 0.4	$ 0.4	$ 0.9

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Detail) - USD ($) $ in Millions	Oct. 16, 2014	Oct. 09, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Reclassification of common unit liability to additional paid in capital			$ 490.2
Vesting date			May 15, 2017
Common stock distributed in connection with non-liquidating distribution		20,460,047
Total stock-based compensation expense			$ 200.7	$ 253.7	$ 105.8
Award recorded as liability			$ 1.9	392.4
PCIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incentive plan termination period	10 years
CII [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares authorized			625,000,000
Common unit unvested		29,555
Common stock distributed in exchange for vested preferred units		256,265
Part A Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs outstanding			933,217
Total stock-based compensation expense			$ 12.6
Unrecognized compensation cost			12.6
Award recorded as liability			$ 1.9
Part B Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs outstanding			1,249,873
Shares authorized			1,490,023			1,381,086	2,210,534
Total stock-based compensation expense			$ 31.3
Unrecognized compensation cost			$ 21.9
Common Units [Member] | CII [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares authorized			625,000,000
Common unit unvested		6,353,302
Common stock distributed for existing share holders		10,294,867
Total stock-based compensation expense			$ 156.4	253.3	104.9
Unrecognized compensation cost			70.2
Preferred Units [Member] | CII [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense			0.4	$ 0.4	$ 0.9
Vested Portion of Part A Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense			$ 12.6

Stock-Based Compensation (Sum71

Stock-Based Compensation (Summary Of Part B RSUs Granted, Maximum Eligible Shares Of Stock And Grant Date Fair Value Per Part B RSU) (Detail) - Part B Restricted Stock Units [Member] - $ / shares	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Part B RSUs granted	316,353	359,658	575,660
Shares authorized	1,490,023	1,381,086	2,210,534
Grant date fair value per Part B RSU	$ 27.10	$ 24.36	$ 63.12

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying value of the notes	$ 3,668.7	$ 3,150.8
Hypothetical annual interest expense	16.5
Hypothetical increase to interest rate swap fair value	$ 7.3
Fair Value of Stock Based Compensation Liability [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Stock-based compensation liability		392.4
Interest Rate Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Hypothetical interest rate increase	1.00%
Change in fair value of interest rate swap	$ 2.1	4.6	$ 2.6
Term Loan Facility [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying value of the notes	$ 1,627	1,990.2
Hypothetical interest rate increase	1.00%
Term Loan Facility [Member] | LIBOR [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Floor rate	1.00%
Revolver interest rate	2.75%
Notes [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying value of the notes	$ 2,112.7	1,250
Fair value of the notes	$ 2,109.3	$ 1,294.8

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Financial Instruments Measured At Fair Value On A Recurring Basis) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 4.1	$ 2

Commitments and Contingencies74

Commitments and Contingencies (Schedule of Future Contractual Capital Lease Payments) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]
2,016	$ 6.4
2,017	7
2,018	5.6
2,019	5
2,020	3.8
Thereafter	17.3
Total minimum lease payments	45.1
Less amounts representing interest	(12.4)
Less current portion	(4.4)	$ (2.4)
Capital lease obligations, non-current	$ 28.3	$ 25.7

Commitments and Contingencies75

Commitments and Contingencies (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Commitment And Contingencies [Line Items]
Lease expense		$ 125.3	$ 90.1	$ 87.2
Net lease termination charge				10.2
Purchase commitments		226.4
Outstanding letters of credit		9.2
Lease Termination [Member]
Commitment And Contingencies [Line Items]
Charge for lease termination costs	$ 10.4
Benefit related to release of associated rent escalation accrual	$ 0.2
Net lease termination charge				$ 10.2
Remaining lease obligation		$ 6.3	$ 8.1

Commitments and Contingencies76

Commitments and Contingencies (Schedule of Minimum Contractual Long-Term Operating Lease Payments) (Detail) $ in Millions	Jun. 30, 2015USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,016	$ 119.3
2,017	86.9
2,018	75.4
2,019	62.7
2,020	48.9
Thereafter	280.7
Total operating lease obligations	$ 673.9

Related Party Transactions (Sch

Related Party Transactions (Schedule of Revenue and Expense Transactions) (Detail) - O V S [Member] - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Related Party Transaction [Line Items]
Revenues	$ 6.9	$ 7	$ 6.6
Operating costs	$ 1	$ 1.6	$ 1.5

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Detail) - USD ($) $ in Millions	Jun. 28, 2015	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2015	Jun. 30, 2014
Related Party Transaction [Line Items]
Due from related parties		$ 0.9			$ 0.6	$ 0.9
Debt obligations		3,260.8			3,752.4	3,260.8
10.125% Senior Notes due 2020 [Member] | Unsecured Debt [Member]
Related Party Transaction [Line Items]
Interest rate	10.125%
Maturity date	2,020
O V S [Member]
Related Party Transaction [Line Items]
Due from related parties		0.1			0.6	0.1
CII [Member]
Related Party Transaction [Line Items]
Authorized non-liquidating cash distribution				$ 10
Non-liquidating distribution to common unit holders made by subsidiary to parent company		9	$ 3	$ 10
Non-cash settlement of note receivable from stock holder		$ 22
Outstanding notes receivable					0
Holdings
Related Party Transaction [Line Items]
Due from related parties					1.3
Dan Caruso [Member] | Aircraft Reimbursement [Member]
Related Party Transaction [Line Items]
Payable to related party settled					$ 0.7	$ 0.1
Matt Erickson, President of Zayo Physical Infrastructure [Member] | 10.125% Senior Notes due 2020 [Member] | Unsecured Debt [Member]
Related Party Transaction [Line Items]
Debt instrument, face amount	$ 0.6
Notes to be redeemed	0.2
Debt obligations	$ 0.4

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Detail)	12 Months Ended
	Jun. 30, 2015segmentDarkFiber
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Physical Infrastructure [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Number of dark fiber leased to customers	2
Contract term	3 years
Physical Infrastructure [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Number of dark fiber leased to customers	12
Contract term	20 years
Cloud and Connectivity [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Contract term	2 years
Cloud and Connectivity [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Contract term	5 years
Other [Member]
Segment Reporting Information [Line Items]
Contract term	1 year

Segment Reporting (Summary of F

Segment Reporting (Summary of Financial Information by Segments) (Detail) - USD ($) $ in Millions	3 Months Ended																6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]
Revenue from external customers	$ 361.9	[1]	$ 340.7	[1],[2],[3]	$ 323.9	[1]	$ 320.6	[1]	$ 298.1	[4],[5]	$ 283.2		$ 278.7		$ 269.7		$ 644.5	$ 985.2	$ 1,347.1	[1]	$ 1,129.7	[4]	$ 1,011
Segment Adjusted EBITDA			199		189.7		183										372.7	571.7	782.6		660.3		560.5
Total assets	6,094		5,886.2		4,988.8		4,972.9		4,980.9								4,988.8	5,886.2	6,094		4,980.9		4,152.1
Capital expenditures																			530.4		360.8		332.6
Capital expenditures, net of stimulus grant reimbursements			130.1		129.5		115.3										244.8	374.9					323.3
Reportable Segments [Member] | Physical Infrastructure [Member]
Segment Reporting Information [Line Items]
Revenue from external customers			168.2		156.4		154										310.4	478.6	662.4		495.4		413
Segment Adjusted EBITDA			110.5		102.9		98.4										201.3	311.7	432.8		325.6		276.1
Total assets	3,694.3		3,615.5		2,900.5		2,891.8		2,872.5								2,900.5	3,615.5	3,694.3		2,872.5		2,311.5
Capital expenditures																			328.4		209.2
Capital expenditures, net of stimulus grant reimbursements			83.2		77		69										146	229.2					180.3
Reportable Segments [Member] | Cloud and Connectivity [Member]
Segment Reporting Information [Line Items]
Revenue from external customers			166.8		162		160.5										322.6	489.4	661.5		606.2		570.5
Segment Adjusted EBITDA			87.3		85.7		83.2										168.9	256.2	344.5		326.7		278.3
Total assets	1,976		1,946.3		1,768		1,756.5		1,739.1								1,768	1,946.3	1,976		1,739.1		1,685.5
Capital expenditures																			201.8		151.6
Capital expenditures, net of stimulus grant reimbursements			46.9		52.5		46.3										98.8	145.7					143
Reportable Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers			5.7		5.5		6.1										11.5	17.2	23.2		28.1		27.8
Segment Adjusted EBITDA			1.2		1.1		1.4										2.5	3.8	5.3		8		6.2
Total assets	35		38.5		36.1		40.5		43.1								36.1	38.5	35		43.1		32.4
Capital expenditures																			0.2
Corporate/eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from external customers																							(0.3)
Segment Adjusted EBITDA																							(0.1)
Total assets	$ 388.7		$ 285.9		$ 284.2		$ 284.1		$ 326.2								$ 284.2	$ 285.9	$ 388.7		$ 326.2		$ 122.7
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Segment Reporting (Reconciliati

Segment Reporting (Reconciliation from Segment Adjusted EBITDA to Net Earnings/(Loss) from Continuing Operations) (Detail) - USD ($) $ in Millions	Jul. 02, 2012	Jun. 30, 2015	[1]	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014	[4],[5]	Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting [Abstract]
Total Segment Adjusted EBITDA				$ 199		$ 189.7		$ 183										$ 372.7	$ 571.7	$ 782.6		$ 660.3		$ 560.5
Interest expense																				(214)		(203.5)		(202.5)
Depreciation and amortization expense		$ (113.2)		(100.1)	[1],[2],[3]	(96.9)	[1]	(96)	[1]	$ (91.3)		$ (84.2)		$ (81.7)		$ (81)				(406.2)	[1]	(338.2)	[4]	(324.5)
Transaction costs																				(5.9)		(4.5)		(14.2)
Stock-based compensation																				(200.7)		(253.7)		(105.8)
Loss on extinguishment of debt	$ (65)	(8.5)	[9]	(54.9)	[1],[2],[3],[9]	(30.9)	[1],[9]							(1.9)	[10]					(94.3)	[1],[9]	(1.9)	[4],[10]	(77.3)
Unrealized foreign currency gain/(loss)																				(24.4)		4.7		0.1
Non-cash loss on investments																				(0.9)
Loss before income taxes		$ 9.8		$ (72.1)	[1],[2],[3]	$ (0.6)	[1]	$ (100.9)	[1]	$ (59.5)		$ (31.5)		$ (27.6)		$ (18.2)				$ (163.8)	[1]	$ (136.8)	[4]	$ (163.7)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.
[9]	The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.
[10]	The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

Segment Reporting (Schedule of

Segment Reporting (Schedule of Geographical Information (Detail) - USD ($) $ in Millions	3 Months Ended																6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2015		Mar. 31, 2015	[1],[2],[3]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014		Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers	$ 361.9	[1]	$ 340.7		$ 323.9		$ 320.6		$ 298.1	[4],[5]	$ 283.2		$ 278.7		$ 269.7		$ 644.5	$ 985.2	$ 1,347.1	[1]	$ 1,129.7	[4]	$ 1,011
Long-lived assets	4,302.3								3,570.4										4,302.3		3,570.4		3,115.5
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers																			1,193.5		1,059.3		953.1
Long-lived assets	3,848								3,140.2										3,848		3,140.2		2,995.3
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers																			119		70.3		57.5
Long-lived assets	405.3								429.9										405.3		429.9		120.2
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers																					0.1		$ 0.4
Long-lived assets	0.3								$ 0.3										0.3		$ 0.3
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers																			34.6
Long-lived assets	$ 48.7																		$ 48.7
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.

Condensed Consolidating Finan83

Condensed Consolidating Financial Information (Narrative) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	May. 06, 2015	Jun. 30, 2014
Condensed Financial Statements Captions [Line Items]
Debt obligations	$ 3,752.4		$ 3,260.8
10.125% Senior Notes due 2020 [Member] | Unsecured Debt [Member]
Condensed Financial Statements Captions [Line Items]
Debt obligations	325.6		$ 500
6.00% Senior Notes due 2023 [Member] | Unsecured Debt [Member]
Condensed Financial Statements Captions [Line Items]
Debt obligations	1,430
6.375% Senior Notes due 2025 [Member] | Unsecured Debt [Member]
Condensed Financial Statements Captions [Line Items]
Debt obligations	$ 350	$ 344.5

Condensed Consolidating Finan84

Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Balance Sheet) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Current assets
Cash and cash equivalents	$ 308				$ 297.4	$ 91.3	$ 150.7
Trade receivables, net of allowance of $3.4 and $3.7 as of June 30, 2015 and June 30, 2014, respectively	88				57.2
Due from related parties	0.6				0.9
Prepaid expenses	37.3				24.9
Deferred income taxes, net	129.5				161
Other assets	3.9				2.4
Total current assets	567.3				543.8
Property and equipment, net	3,299.2				2,822.4
Intangible assets, net	948.3				710.3
Goodwill	1,224.4				866.7	688.8
Other assets	54.8				37.7
Total assets	6,094	$ 5,886.2	$ 4,988.8	$ 4,972.9	4,980.9	4,152.1
Current liabilities
Current portion of long-term debt	16.5				20.5
Accounts payable	40				26.7
Accrued liabilities	182.4				172.3
Accrued interest	57.2				57.1
Capital lease obligations, current	4.4				2.4
Due to related parties	1.3
Deferred revenue, current	86.6				75.4
Total current liabilities	388.4				354.4
Long-term debt, non-current	3,652.2				3,130.3
Capital lease obligation, non-current	28.3				25.7
Deferred revenue, non-current	612.7				501.5
Stock-based compensation liability	1.9				392.4
Deferred income taxes, net	189.7				153
Other long-term liabilities	26.7				22.3
Total liabilities	4,899.9				4,579.6
Member's Equity
Member's interest	1,699.1				728.9
Accumulated other comprehensive (loss)/income	(7.9)				14.4
Accumulated deficit	(497.1)				(342)
Total member's equity	1,194.1				401.3
Total liabilities and member's equity	6,094				4,980.9
Eliminations [Member]
Current assets
Due from related parties	(1.4)
Total current assets	(1.4)
Related party receivable	(304.8)				(267.8)
Investment in subsidiary	(1,050.8)				(332.1)
Total assets	(1,357)				(599.9)
Current liabilities
Due to related parties	(1.4)
Total current liabilities	(1.4)
Related party debt, long-term	(304.8)				(267.8)
Total liabilities	(306.2)				(267.8)
Member's Equity
Member's interest	(1,060.3)				(332.1)
Total member's equity	(1,050.8)				(332.1)
Total liabilities and member's equity	(1,357)				(599.9)
Zayo Group, LLC [Member]
Current assets
Cash and cash equivalents	274.3				256	83.6	$ 150.7
Trade receivables, net of allowance of $3.4 and $3.7 as of June 30, 2015 and June 30, 2014, respectively	54.7				33.6
Due from related parties	(1.3)				0.3
Prepaid expenses	25.8				18.7
Deferred income taxes, net	128.5				156
Other assets	3.6				1.9
Total current assets	485.6				466.5
Property and equipment, net	2,622.9				2,389.3
Intangible assets, net	605.8				563.7
Goodwill	762.2				683.5
Other assets	36.2				23.4
Related party receivable	304.8				267.8
Investment in subsidiary	1,050.8				332.1
Total assets	5,868.3				4,726.3
Current liabilities
Current portion of long-term debt	16.5				20.5
Accounts payable	26.6				20.4
Accrued liabilities	125.6				125
Accrued interest	57.2				57.1
Capital lease obligations, current	2				1.5
Due to related parties	1.7				(0.7)
Deferred revenue, current	73.2				56.7
Total current liabilities	302.8				280.5
Long-term debt, non-current	3,652.2				3,130.3
Capital lease obligation, non-current	5.6				5.6
Deferred revenue, non-current	559.4				459.5
Stock-based compensation liability	1.5				343.8
Deferred income taxes, net	139.2				93
Other long-term liabilities	13.5				12.3
Total liabilities	4,674.2				4,325
Member's Equity
Member's interest	1,730.1				782.2
Accumulated deficit	(536)				(380.9)
Total member's equity	1,194.1				401.3
Total liabilities and member's equity	5,868.3				4,726.3
Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents	4.7				5.8	4.2
Trade receivables, net of allowance of $3.4 and $3.7 as of June 30, 2015 and June 30, 2014, respectively	4.6				8.2
Due from related parties	0.4
Prepaid expenses	4.4				0.9
Deferred income taxes, net					3.5
Total current assets	14.1				18.4
Property and equipment, net	335.5				109.3
Intangible assets, net	239.5				51.1
Goodwill	281				38
Other assets	8.3				3.5
Total assets	878.4				220.3
Current liabilities
Accounts payable	4				4.3
Accrued liabilities	20.6				21
Capital lease obligations, current	1.6				0.9
Deferred revenue, current	2.8				1.6
Total current liabilities	29				27.8
Capital lease obligation, non-current	18.6				18.4
Deferred revenue, non-current	4.6				8.6
Stock-based compensation liability	0.1				23.3
Other long-term liabilities	10.5				9.8
Total liabilities	62.8				102.6
Member's Equity
Member's interest	778.1				73.8
Accumulated deficit	37.5				43.9
Total member's equity	815.6				117.7
Total liabilities and member's equity	878.4				220.3
Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents	29				35.6	$ 3.5
Trade receivables, net of allowance of $3.4 and $3.7 as of June 30, 2015 and June 30, 2014, respectively	28.7				15.4
Due from related parties	2.9				0.6
Prepaid expenses	7.1				5.3
Deferred income taxes, net	1				1.5
Other assets	0.3				0.5
Total current assets	69				58.9
Property and equipment, net	340.8				323.8
Intangible assets, net	103				95.5
Goodwill	181.2				145.2
Other assets	10.3				10.8
Total assets	704.3				634.2
Current liabilities
Accounts payable	9.4				2
Accrued liabilities	36.2				26.3
Capital lease obligations, current	0.8
Due to related parties					0.7
Deferred revenue, current	10.6				17.1
Total current liabilities	58				46.1
Related party debt, long-term	304.8				267.8
Capital lease obligation, non-current	4.1				1.7
Deferred revenue, non-current	48.7				33.4
Stock-based compensation liability	0.3				25.3
Deferred income taxes, net	50.5				45.3
Other long-term liabilities	2.7				0.2
Total liabilities	469.1				419.8
Member's Equity
Member's interest	251.2				205
Accumulated other comprehensive (loss)/income	(7.9)				14.4
Accumulated deficit	(8.1)				(5)
Total member's equity	235.2				214.4
Total liabilities and member's equity	$ 704.3				$ 634.2

Condensed Consolidating Finan85

Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statements Of Operations) (Detail) - USD ($) $ in Millions	Jul. 02, 2012	Jun. 30, 2015	[1]	Mar. 31, 2015	[1],[2],[3]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[4],[5]	Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Condensed Statement Of Income Captions [Line Items]
Revenue		$ 361.9		$ 340.7		$ 323.9		$ 320.6		$ 298.1		$ 283.2		$ 278.7		$ 269.7		$ 644.5	$ 985.2	$ 1,347.1	[1]	$ 1,129.7	[4]	$ 1,011
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)		107.5		100.9		97.8		107.3		92.8		84.9		85.9		79.7				413.5	[1]	343.3	[4]	314.1
Selling, general and administrative expenses (including stock-based compensation—Note 12)		86.4	[9]	83	[9]	32.1	[9]	156.6	[9]	124.6		96.6		87		76.4				358.1	[1],[9]	384.6	[4]	256.7
Depreciation and amortization		113.2		100.1		96.9		96		91.3		84.2		81.7		81				406.2	[1]	338.2	[4]	324.5
Total operating costs and expenses		307.1		284		226.8		359.9		308.7		265.7		254.6		237.1				1,177.8	[1]	1,066.1	[4]	895.3
Operating income		54.8		56.7		97.1		(39.3)		(10.6)		17.5		24.1		32.6				169.3	[1]	63.6	[4]	115.7
Other expenses
Interest expense		(53)		(60.7)		(53.4)		(46.9)		(52.6)	[10]	(49.1)	[10]	(50.3)	[10]	(51.5)	[10]			(214)	[1]	(203.5)	[4],[10]	(202.5)
Loss on extinguishment of debt	$ (65)	(8.5)	[11]	(54.9)	[11]	(30.9)	[11]							(1.9)	[12]					(94.3)	[1],[11]	(1.9)	[4],[12]	(77.3)
Foreign currency (loss)/gain on intercompany loans		16.8		(13.2)		(13.3)		(14.7)		3.8		0.1		0.2		0.6				(24.4)	[1]	4.7	[4]	0.1
Other income, net		(0.3)				(0.1)				(0.1)				0.3		0.1				(0.4)	[1]	0.3	[4]	0.3
Total other expenses, net		(45)		(128.8)		(97.7)		(61.6)		(48.9)		(49)		(51.7)		(50.8)				(333.1)	[1]	(200.4)	[4]	(279.4)
Loss before income taxes		9.8		(72.1)		(0.6)		(100.9)		(59.5)		(31.5)		(27.6)		(18.2)				(163.8)	[1]	(136.8)	[4]	(163.7)
(Benefit)/provision for income taxes		4.6		(18.4)		(4.3)		9.4		10.5		12.1		8.4		9.3				(8.7)	[1]	40.3	[4]	(21.8)
Net Loss		$ 5.2		$ (53.7)		$ 3.7		$ (110.3)		$ (70)		$ (43.6)		$ (36)		$ (27.5)				(155.1)	[1]	(177.1)	[4]	(141.9)
Eliminations [Member]
Condensed Statement Of Income Captions [Line Items]
Revenue																								(8.7)
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)																								(8.7)
Total operating costs and expenses																								(8.7)
Other expenses
Equity in net earnings of subsidiaries																				9.5		(28.2)		(20.7)
Total other expenses, net																				9.5		(28.2)		(20.7)
Loss before income taxes																				9.5		(28.2)		(20.7)
Net Loss																				9.5		(28.2)		(20.7)
Zayo Group, LLC [Member]
Condensed Statement Of Income Captions [Line Items]
Revenue																				1,040.1		956.5		876.4
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)																				313.8		290.1		255.5
Selling, general and administrative expenses (including stock-based compensation—Note 12)																				266.4		327.3		229.5
Depreciation and amortization																				321.7		307.6		301.4
Total operating costs and expenses																				901.9		925		786.4
Operating income																				138.2		31.5		90
Other expenses
Interest expense																				(177)		(201.1)		(202.1)
Loss on extinguishment of debt																				(91.8)		(1.9)		(77.3)
Foreign currency (loss)/gain on intercompany loans																				(23.2)		3.5		0.1
Other income, net																				(0.4)		0.3		0.2
Equity in net earnings of subsidiaries																				(9.5)		28.2		20.7
Total other expenses, net																				(301.9)		(171)		(258.4)
Loss before income taxes																				(163.7)		(139.5)		(168.4)
(Benefit)/provision for income taxes																				(8.6)		37.6		(26.5)
Net Loss																				(155.1)		(177.1)		(141.9)
Guarantor Subsidiaries [Member]
Condensed Statement Of Income Captions [Line Items]
Revenue																				151.6		102.8		85.4
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)																				54.4		45.5		50.4
Selling, general and administrative expenses (including stock-based compensation—Note 12)																				38.9		28.3		9.4
Depreciation and amortization																				42.7		13.8		9.8
Total operating costs and expenses																				136		87.6		69.6
Operating income																				15.6		15.2		15.8
Other expenses
Interest expense																				(20.3)
Loss on extinguishment of debt																				(1.7)
Total other expenses, net																				(22)
Loss before income taxes																				(6.4)		15.2		15.8
Net Loss																				(6.4)		15.2		15.8
Non-Guarantor Subsidiaries [Member]
Condensed Statement Of Income Captions [Line Items]
Revenue																				155.4		70.4		57.9
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 12)																				45.3		7.7		16.9
Selling, general and administrative expenses (including stock-based compensation—Note 12)																				52.8		29		17.8
Depreciation and amortization																				41.8		16.8		13.3
Total operating costs and expenses																				139.9		53.5		48
Operating income																				15.5		16.9		9.9
Other expenses
Interest expense																				(16.7)		(2.4)		(0.4)
Loss on extinguishment of debt																				(0.8)
Foreign currency (loss)/gain on intercompany loans																				(1.2)		1.2
Other income, net																								0.1
Total other expenses, net																				(18.7)		(1.2)		(0.3)
Loss before income taxes																				(3.2)		15.7		9.6
(Benefit)/provision for income taxes																				(0.1)		2.7		4.7
Net Loss																				$ (3.1)		$ 13		$ 4.9
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.
[9]	The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation.
[10]	The Company realized an increase in interest expense during the second and fourth quarters of 2014 due to financing transactions completed to increase its borrowings under its term loan facility. See Note 8— Long-Term Debt.
[11]	The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.
[12]	The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.

Condensed Consolidating Finan86

Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Condensed Cash Flow Statements Captions [Line Items]
Net cash provided by operating activities	$ 607	$ 562	$ 404.7
Cash flows from investing activities
Purchases of property and equipment, net of stimulus grants	(530.4)	(360.8)	(323.3)
Acquisition of net cash acquired	(855.7)	(393.3)	(2,480.7)
Net cash used in investing activities	(1,386.1)	(754.1)	(2,804)
Cash flows from financing activities
Proceeds from debt	1,787.3	423.6	3,189.3
Proceeds from revolving credit facility		195
Proceeds from equity offerings and contributions	385	5.6	344
Distribution to parent		(1.2)
Principal payments on long-term debt	(1,288.5)	(18)	(1,058.6)
Payment of early redemption fees on debt extinguished	(62.6)		(72.1)
Principal payments on capital lease obligations	(3.5)	(7.9)	(1.9)
Payments on revolving credit facility		(195)
Payment of debt issuance costs	(24.2)	(4.9)	(83.1)
Net cash provided by financing activities	793.5	397.2	2,340.2
Effect of changes in foreign exchange rates on cash	(3.8)	1	(0.3)
Cash flows from continuing operations	14.4	205.1	(59.1)
Cash and cash equivalents, beginning of year	297.4	91.3	150.7
Cash and cash equivalents, end of period	308	297.4	91.3
Change in restricted cash, net			22.6
Zayo Group, LLC [Member]
Condensed Cash Flow Statements Captions [Line Items]
Net cash provided by operating activities	489.3	485.5	359.3
Cash flows from investing activities
Purchases of property and equipment, net of stimulus grants	(436.8)	(316.6)	(299.8)
Acquisition of net cash acquired	(113.5)	(83.2)	(2,489)
Net cash used in investing activities	(550.3)	(399.8)	(2,788.8)
Cash flows from financing activities
Proceeds from debt	1,747.2	423.6	3,184.4
Proceeds from revolving credit facility		195
Proceeds from equity offerings and contributions	(290.9)	11.2	344
Distribution to parent		(1.2)
Dividends received/(paid)		(70.8)	18.6
Principal payments on long-term debt	(1,288.5)	(18)	(1,058.6)
Payment of early redemption fees on debt extinguished	(62.6)		(72.1)
Principal payments on capital lease obligations	(1.7)	(2.1)	(1.8)
Payment of)/receipt from intercompany loans		(251.1)	8.3
Payments on revolving credit facility		(195)
Payment of debt issuance costs	(24.2)	(4.9)	(83.1)
Net cash provided by financing activities	79.3	86.7	2,362.3
Effect of changes in foreign exchange rates on cash			0.1
Cash flows from continuing operations	18.3	172.4	(67.2)
Cash and cash equivalents, beginning of year	256	83.6	150.7
Cash and cash equivalents, end of period	274.3	256	83.6
Change in restricted cash, net			22.6
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements Captions [Line Items]
Net cash provided by operating activities	55.7	43.2	31.8
Cash flows from investing activities
Purchases of property and equipment, net of stimulus grants	(47.8)	(28.2)	(14.1)
Acquisition of net cash acquired	(668.3)	(17.8)	0.4
Net cash used in investing activities	(716.1)	(46)	(13.7)
Cash flows from financing activities
Proceeds from debt			4.9
Proceeds from equity offerings and contributions	660.7	(5.6)
Dividends received/(paid)		15.8	(18.6)
Principal payments on capital lease obligations	(1.4)	(5.8)	(0.1)
Net cash provided by financing activities	659.3	4.4	(13.8)
Effect of changes in foreign exchange rates on cash			(0.1)
Cash flows from continuing operations	(1.1)	1.6	4.3
Cash and cash equivalents, beginning of year	5.8	4.2
Cash and cash equivalents, end of period	4.7	5.8	4.2
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements Captions [Line Items]
Net cash provided by operating activities	62	33.3	13.6
Cash flows from investing activities
Purchases of property and equipment, net of stimulus grants	(45.8)	(16)	(9.4)
Acquisition of net cash acquired	(73.9)	(292.3)	7.9
Net cash used in investing activities	(119.7)	(308.3)	(1.5)
Cash flows from financing activities
Proceeds from debt	40.1
Proceeds from equity offerings and contributions	15.2
Dividends received/(paid)		55
Principal payments on capital lease obligations	(0.4)
Payment of)/receipt from intercompany loans		251.1	(8.3)
Net cash provided by financing activities	54.9	306.1	(8.3)
Effect of changes in foreign exchange rates on cash	(3.8)	1	(0.3)
Cash flows from continuing operations	(2.8)	31.1	3.8
Cash and cash equivalents, beginning of year	35.6	3.5
Cash and cash equivalents, end of period	$ 29	$ 35.6	$ 3.5

Quarterly Financial Data (Sched

Quarterly Financial Data (Schedule of Quarterly Results) (Detail) - USD ($) $ in Millions	Jul. 02, 2012	Jun. 30, 2015	[1]	Mar. 31, 2015	[1],[2],[3]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[4],[5]	Mar. 31, 2014	[4],[6]	Dec. 31, 2013	[4],[7],[8]	Sep. 30, 2013	[4]	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015	[1]	Jun. 30, 2014	[4]	Jun. 30, 2013
Quarterly Financial Data [Abstract]
Revenue		$ 361.9		$ 340.7		$ 323.9		$ 320.6		$ 298.1		$ 283.2		$ 278.7		$ 269.7		$ 644.5	$ 985.2	$ 1,347.1		$ 1,129.7		$ 1,011
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation)		107.5		100.9		97.8		107.3		92.8		84.9		85.9		79.7				413.5		343.3		314.1
Selling, general and administrative expenses (including stock-based compensation—Note 12)		86.4	[9]	83	[9]	32.1	[9]	156.6	[9]	124.6		96.6		87		76.4				358.1	[9]	384.6		256.7
Depreciation and amortization		113.2		100.1		96.9		96		91.3		84.2		81.7		81				406.2		338.2		324.5
Total operating costs and expenses		307.1		284		226.8		359.9		308.7		265.7		254.6		237.1				1,177.8		1,066.1		895.3
Operating income		54.8		56.7		97.1		(39.3)		(10.6)		17.5		24.1		32.6				169.3		63.6		115.7
Other expenses
Interest expense		(53)		(60.7)		(53.4)		(46.9)		(52.6)	[10]	(49.1)	[10]	(50.3)	[10]	(51.5)	[10]			(214)		(203.5)	[10]	(202.5)
Loss on extinguishment of debt	$ (65)	(8.5)	[11]	(54.9)	[11]	(30.9)	[11]							(1.9)	[12]					(94.3)	[11]	(1.9)	[12]	(77.3)
Foreign currency (loss)/gain on intercompany loans		16.8		(13.2)		(13.3)		(14.7)		3.8		0.1		0.2		0.6				(24.4)		4.7		0.1
Other (expenses)/income, net		(0.3)				(0.1)				(0.1)				0.3		0.1				(0.4)		0.3		0.3
Total other expenses, net		(45)		(128.8)		(97.7)		(61.6)		(48.9)		(49)		(51.7)		(50.8)				(333.1)		(200.4)		(279.4)
Loss before income taxes		9.8		(72.1)		(0.6)		(100.9)		(59.5)		(31.5)		(27.6)		(18.2)				(163.8)		(136.8)		(163.7)
(Benefit)/provision for income taxes		4.6		(18.4)		(4.3)		9.4		10.5		12.1		8.4		9.3				(8.7)		40.3		(21.8)
Net Loss		$ 5.2		$ (53.7)		$ 3.7		$ (110.3)		$ (70)		$ (43.6)		$ (36)		$ (27.5)				$ (155.1)		$ (177.1)		$ (141.9)
[1]	The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.
[2]	The Company realized an increase in revenue and operating expenses beginning February 23, 2015 as a result of the acquisition of Latisys.
[3]	The Company realized an increase in revenue and operating expenses beginning January 1, 2015 as a result of the acquisition of IdeaTek.
[4]	The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.
[5]	The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.
[6]	The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.
[7]	The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.
[8]	The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.
[9]	The Company realized an increase in compensation expense in the first quarter as a result of an increase in the estimated fair value of CII common units as a result of the pending IPO. The common unit fair values were further adjusted in second quarter upon completion of the IPO. See Note 12— Stock-based Compensation.
[10]	The Company realized an increase in interest expense during the second and fourth quarters of 2014 due to financing transactions completed to increase its borrowings under its term loan facility. See Note 8— Long-Term Debt.
[11]	The Company completed debt refinancing transactions during the second, third and fourth quarters of Fiscal 2015, resulting in a loss on debt extinguishment for those respective periods. See Note 8— Long-Term Debt.
[12]	The Company completed a debt refinancing transaction during the second quarter of Fiscal 2014, resulting in a loss on debt extinguishment for that period. See Note 8— Long-Term Debt.