Mitel Networks (MITL) 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 28, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	MITL
Entity Registrant Name	MITEL NETWORKS CORP
Entity Central Index Key	1170534
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		100,214,906

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Current assets:
Cash and cash equivalents	$100.80		$111.30
Accounts receivable (net of allowance for doubtful accounts of $12.2 and $13.2, respectively)	195		237.5
Sales-type lease receivables (net) (note 4)	15.9		18.1
Inventories (net) (note 5)	93.9		88.3
Deferred tax asset	34.8		31.7
Other current assets (note 6)	46.4		53.2
Assets, Current, Total	486.8		540.1
Non-current portion of sales-type lease receivables (net) (note 4)	17.8		19.7
Deferred tax asset	129.5		133.6
Property and equipment (net)	47.2		50.7
Identifiable intangible assets (net) (note 7)	161.8		175.8
Goodwill	340.3		340.3
Other non-current assets	14.5		18.6
Assets, Total	1,197.90		1,278.80
Current liabilities:
Accounts payable and accrued liabilities (note 8)	184.1		215
Current portion of deferred revenue	77.5		78.2
Current portion of long-term debt (note 10)	5.8		6.2
Liabilities, Current, Total	267.4		299.4
Long-term debt (note 10)	285.4		310.6
Long-term portion of deferred revenue	34.6		35.6
Deferred tax liability	16.2		15.3
Pension liability (note 11)	159.6		136.1
Other non-current liabilities	27.7		34
Liabilities, Total	790.9		831
Commitments, guarantees and contingencies (note 12)
Shareholders' equity:
Common shares, without par value -issued and outstanding: 100.2 and 100.1, respectively	1,217.70		1,216.30
Warrants (note 14)	39.1	[1]	39.1	[1]
Additional paid-in capital	39.2		38
Accumulated deficit	-693.3		-698.6
Accumulated other comprehensive loss	-195.7		-147
Stockholders' Equity Attributable to Parent, Total	407		447.8
Liabilities and Equity, Total	$1,197.90		$1,278.80
[1]	At March 31, 2015, there were 2.48 million warrants outstanding that were issued in connection with government funding (December 31, 2014-2.48 million). The warrants have an exercise price of nil, are exercisable at any time at the option of the holder and have no expiry date.

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Accounts receivable, allowance for doubtful accounts	$12.20	$13.20
Common shares, without par value
Common shares, shares issued	100.2	100.1
Common shares, shares outstanding	100.2	100.1

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues	$248.10	$241.50
Cost of revenues	117.7	112.1
Gross margin	130.4	129.4
Expenses:
Selling, general and administrative	81.6	76.9
Research and development	26.9	26.3
Special charges and restructuring costs (note 16)	13	13.2
Amortization of acquisition-related intangible assets	14.1	11.3
Operating Expenses, Total	135.6	127.7
Operating income (loss)	-5.2	1.7
Interest expense	-4.6	-5.9
Debt retirement costs (note 10)	-0.7	-14.7
Other income (note 20)	15.4	0.1
Income (loss) from operations, before income taxes	4.9	-18.8
Current income tax recovery (expense)	-0.5	0.3
Deferred income tax recovery (expense)	0.9	4.9
Net income (loss)	5.3	-13.6
Net income (loss) per common share
Basic	$0.05	($0.16)
Diluted	$0.05	($0.16)
Weighted-average number of common shares outstanding (note 15)
Basic	100.1	83.5
Diluted	104.8	83.5
Product
Revenues	160.7	166.5
Cost of revenues	69.1	68
Services
Revenues	64.1	55.9
Cost of revenues	36.3	34.3
Cloud Recurring
Revenues	23.3	19.1
Cost of revenues	$12.30	$9.80

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income (loss)	$5.30	($13.60)
Other comprehensive income (loss):
Foreign currency translation adjustments	-23.1	2.1
Pension liability adjustments	-25.6	-7.7
Other comprehensive loss, net of tax, total	-48.7	-5.6
Comprehensive loss	($43.40)	($19.20)

CONSOLIDATED_STATEMENTS_OF_SHA

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Total	Common Shares	Warrants	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
In Millions
Balance at Dec. 31, 2013	$118.40	$814.90	$39.10	$35.30	($691.30)	($79.60)
Balance (in shares) at Dec. 31, 2013		54.4
Comprehensive income (loss)	-19.2				-13.6	-5.6
Exercise of stock options (in shares)	0.3	0.3
Exercise of stock options	1.6	2.3		-0.7
Stock-based compensation	1.3			1.3
Issuance of shares (note 3) (in shares)		44.2
Issuance of shares (note 3)	391.3	391.3
Balance at Mar. 31, 2014	493.4	1,208.50	39.1	35.9	-704.9	-85.2
Balance (in shares) at Mar. 31, 2014		98.9
Comprehensive income (loss)	-11.2				0.8	-12
Exercise of stock options (in shares)		0.5
Exercise of stock options	2.4	3.9		-1.5
Stock-based compensation	1.7			1.7
Balance at Jun. 30, 2014	486.3	1,212.40	39.1	36.1	-704.1	-97.2
Balance (in shares) at Jun. 30, 2014		99.4
Comprehensive income (loss)	-23.3				-5.3	-18
Exercise of stock options (in shares)		0.5
Exercise of stock options	2	2.8		-0.8
Stock-based compensation	1.5			1.5
Balance at Sep. 30, 2014	466.5	1,215.20	39.1	36.8	-709.4	-115.2
Balance (in shares) at Sep. 30, 2014		99.9
Comprehensive income (loss)	-21				10.8	-31.8
Exercise of stock options (in shares)		0.2
Exercise of stock options	0.7	1.1		-0.4
Stock-based compensation	1.6			1.6
Balance at Dec. 31, 2014	447.8	1,216.30	39.1	38	-698.6	-147
Balance (in shares) at Dec. 31, 2014	100.1	100.1
Comprehensive income (loss)	-43.4				5.3	-48.7
Exercise of stock options (in shares)	0.1	0.1
Exercise of stock options	0.8	1.4		-0.6
Stock-based compensation	1.8			1.8
Balance at Mar. 31, 2015	$407	$1,217.70	$39.10	$39.20	($693.30)	($195.70)
Balance (in shares) at Mar. 31, 2015	100.2	100.2

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH PROVIDED BY (USED IN) Operating activities:
Net income (loss)	$5.30	($13.60)
Adjustments to reconcile net loss to net cash from operating activities:
Amortization and depreciation	19.3	16.2
Stock-based compensation	1.8	1.3
Deferred income tax expense (recovery)	-0.9	-4.9
Non-cash portion of debt retirement costs (note 10)	0.7	14.2
Non-cash movements in provisions	-0.9
Change in non-cash operating assets and liabilities (note 18)	-4.2	13.6
Net cash provided by operating activities	21.1	26.8
Investing activities:
Additions to property, equipment and intangible assets	-1.1	-3.2
Acquisitions, net of cash acquired		-6.2
Net cash used in investing activities	-1.1	-9.4
Financing activities:
Proceeds from issuance of long-term debt (note 10)		353.2
Repayment of long-term debt (note 10)	-25	-259.4
Prepayment fees relating to prior credit facilities (note 10)		-4.2
Payment of deferred financing costs (note 10)		-11
Repayment of capital lease liabilities and other long-term debt	-2.1	-2.8
Proceeds from issuance of common shares from option exercises	0.8	1.6
Net cash provided by (used in) financing activities	-26.3	77.4
Effect of exchange rate changes on cash and cash equivalents	-4.2	1
Net increase (decrease) in cash and cash equivalents	-10.5	95.8
Cash and cash equivalents, beginning of period	111.3	40.2
Cash and cash equivalents, end of period	$100.80	$136

BASIS_OF_PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2015
BASIS OF PRESENTATION	1. BASIS OF PRESENTATION
	These unaudited interim consolidated financial statements (“Interim Financial Statements”) have been prepared by Mitel Networks Corporation (“Mitel” or the “Company”) in United States (“U.S.”) dollars and, unless otherwise stated, in accordance with accounting principles generally accepted in the U.S. (“GAAP”) for interim financial statements. Accordingly, the Interim Financial Statements do not include all information and footnotes normally included in annual financial statements prepared in accordance with GAAP and the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for annual financial statements. In the opinion of management, the Interim Financial Statements reflect all adjustments of a normal recurring nature that are necessary for a fair presentation of the results for the interim periods presented.
	These Interim Financial Statements and the accompanying notes should be read in conjunction with the annual financial statements and notes thereto for the year ended December 31, 2014, eight months ended December 31, 2013 and each of the two years ended April 30, 2013 and 2012 (the “Annual Financial Statements”) contained in the Company’s report on Form 10-K filed with the SEC on February 26, 2015. The results of operations for the periods presented are not necessarily indicative of the results to be expected for the full year or future periods.

SIGNIFICANT_ACCOUNTING_POLICIE

SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2015
SIGNIFICANT ACCOUNTING POLICIES	2. SIGNIFICANT ACCOUNTING POLICIES
	The Company’s significant accounting policies at December 31, 2014 are described in note 2 to the Annual Financial Statements.
	Recently issued accounting pronouncements
	Other than the accounting pronouncements below, there have been no recent accounting pronouncements that are expected to have a significant effect on the consolidated financial statements.
	Revenue recognition
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09 to provide a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The ASU adds a Revenue from Contracts with Customers subtopic to the FASB ASC and supersedes most current revenue recognition guidance, including industry-specific guidance. The amendment becomes effective for the Company in the first quarter of 2017 and early adoption is not permitted. The Company is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements.
	Going concern assessment and disclosure requirements
	In May 2014, the FASB issued ASU 2014-15 to provide guidance in relation to management’s assessment of an entity’s ability to continue as a going concern and to provide disclosure requirements in certain circumstances. The amendment becomes effective for the Company in the first quarter of 2016. The Company does not expect the adoption to have a material impact on its consolidated financial statements.
	Classification of debt issue costs
	In April 2015, the FASB issued ASU 2015-03 to require debt issue costs, related to a recognized debt liability, be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The amendment becomes effective for the Company in the first quarter of 2016. The Company expects the adoption to result in the reclassification of debt issue costs from other non-current assets to being recorded net against long-term debt on the consolidated balance sheet.

ACQUISITIONS

ACQUISITIONS	3 Months Ended
	Mar. 31, 2015
ACQUISITIONS	3. ACQUISITIONS
	a) Aastra – January 2014
	On January 31, 2014, Mitel acquired Aastra Technologies Limited (“Aastra”), a global provider of unified communications and collaboration software, solutions and services with annual revenues of approximately $600.0 Canadian dollars for the year ended December 31, 2013, of which approximately 75% were generated in Europe. The total value of consideration given by Mitel was $471.3, consisting of $80.0 of cash and 44.2 million Mitel common shares valued at $391.3 for a 100% equity interest in Aastra. In conjunction with the acquisition the Company completed a refinancing of its long-term senior debt, as described in note 10. Aastra’s results of operations are included in the results of operations of the combined entity from the date of acquisition. The following unaudited pro-forma financial information presents the Company’s consolidated financial results as if the acquisition had occurred at the beginning of the period:
			Three Months Ended
			March 31, 2014
	Operations
	Revenues		$	277.4
	Net loss			(30.8	)
	These pro-forma results have been prepared for comparative purposes only and are not necessarily indicative of the results of operations that actually would have resulted had the acquisition been effected at the beginning of the respective periods and are not necessarily representative of future results. The pro-forma results include the following adjustments:
		•		amortization of intangible assets that arose from the acquisition of $29.5 per year;
		•		a reduction to revenue for the three months ended March 31, 2014 (relating to the pro-forma period from January 1, 2014 to January 31, 2014) of $1.1 as a result of the valuation of the deferred revenue acquired being below Aastra’s historical book value and the corresponding decrease in revenues in subsequent periods; and
		•		tax provision based on an estimated effective tax rate of approximately 20%.
	Additional details of the acquisition, including the allocation of the purchase price to the net assets acquired, are included in note 3 to the Annual Financial Statements.
	b) Oaisys – March 2014
	On March 4, 2014, Mitel completed the acquisition of Oaisys, a developer of integrated call recording and quality management solutions. Mitel paid $7.9 for a 100% equity ownership of Oaisys. Oaisys’ results of operations are included in the results of operations of the combined entity from the date of acquisition. Oaisys’ annual revenues were approximately $8.1 for the year ended December 31, 2013. Additional details of the acquisition, including the allocation of the purchase price to the net assets acquired, are included in note 3 to the Annual Financial Statements.

NET_INVESTMENT_IN_SALESTYPE_LE

NET INVESTMENT IN SALES-TYPE LEASES	3 Months Ended
	Mar. 31, 2015
NET INVESTMENT IN SALES-TYPE LEASES	4. NET INVESTMENT IN SALES-TYPE LEASES
	Net investment in sales-type leases represents the value of sales-type leases held in the U.S. and Europe. The Company currently sells the rental payments due to the Company from some of the sales-type leases in the U.S. The Company maintains reserves against its estimate of potential recourse for the balance of sales-type leases (recorded net, against the receivable) and for the balance of sold rental payments remaining unbilled (recorded separately as a lease recourse liability included in other non-current liabilities). The following table provides detail on the sales-type leases:
			March 31, 2015									December 31, 2014
			Gross			Allowance			Net			Gross			Allowance			Net
	Lease balances included in accounts receivable		$	6.4		$	(1.1	)	$	5.3		$	7.4		$	(1.2	)	$	6.2
	Current portion of investment in sales-type leases			16.4			(0.5	)		15.9			18.6			(0.5	)		18.1
	Non-current portion of investment in sales-type leases			18.2			(0.4	)		17.8			20.1			(0.4	)		19.7
	Total unsold sales-type leases (recorded as assets, net, on the consolidated balance sheets)			41			(2.0	)		39			46.1			(2.1	)		44
	Sold rental payments remaining unbilled			57.7			(2.1	)(1)		55.6			63.9			(2.2	)(1)		61.7
	Total of sales-type leases unsold and sold		$	98.7		$	(4.1	)	$	94.6		$	110		$	(4.3	)	$	105.7
	-1	Allowance for sold rental payments is recorded as a lease recourse liability and included in other non-current liabilities on the consolidated balance sheets.
	A sale of rental payments represents the total present value of the payment stream on the sale of the rental payments to third parties. For the three months ended March 31, 2015, the Company sold $3.3 of rental payments and recorded gains on sale of those rental payments of $0.5 (three months ended March 31, 2014—sold $4.7 and recorded gains of $0.8). Sold rental payments remaining unbilled at the end of the period represents the total balance of leases that are not included in the Company’s consolidated balance sheets. The Company is compensated for administration and servicing of rental payments sold.
	Financing receivables
	The Company considers its lease balances included in accounts receivable and its investment in sales-type leases to be financing receivables. Additional disclosures on the credit quality of the Company’s sold and unsold sales-type leases and lease balances included in accounts receivable are as follows:
	Aging Analysis as of March 31, 2015
			Not past due			1-90 days			Greater than			Total past			Total sales-type
						past due			90 days past			due			leases
									due
	Lease balances included in accounts receivable		$	3.3		$	1.7		$	1.4		$	3.1		$	6.4
	Investment in sold and unsold sales-type lease receivables			80.8			10.6			0.9			11.5			92.3
	Total gross sales-type leases			84.1			12.3			2.3			14.6			98.7
	Allowance			(1.8	)		(0.8	)		(1.5	)		(2.3	)		(4.1	)
	Total net sales-type leases		$	82.3		$	11.5		$	0.8		$	12.3		$	94.6
	Aging Analysis as of December 31, 2014
			Not past due			1-90 days			Greater than			Total past			Total sales-type
						past due			90 days past			due			leases
									due
	Lease balances included in accounts receivable		$	4.3		$	1.8		$	1.3		$	3.1		$	7.4
	Investment in sold and unsold sales-type lease receivables			92.3			9.5			0.8			10.3			102.6
	Total gross sales-type leases			96.6			11.3			2.1			13.4			110
	Allowance			(2.0	)		(1.0	)		(1.3	)		(2.3	)		(4.3	)
	Total net sales-type leases		$	94.6		$	10.3		$	0.8		$	11.1		$	105.7
	Allowance for credit losses
	The Company’s allowance for credit losses is based on management’s assessment of the collectability of customer accounts. A considerable amount of judgment is required in order to make this assessment including a detailed analysis of the aging of the lease receivables, the current creditworthiness of our customers and an analysis of historical bad debts and other adjustments. If there is a deterioration of a major customer’s creditworthiness or actual defaults are higher than historical experience, the estimate of the recoverability of amounts due could be adversely affected. The Company reviews in detail the allowance for doubtful accounts on a quarterly basis and adjusts the allowance estimate to reflect actual portfolio performance and any changes in future portfolio performance expectations.
	The following table shows the activity of the allowance for credit losses on sales-type leases:
			Three Months			Year Ended
			Ended			December 31,
			March 31, 2015			2014
	Allowance for credit losses on sales-type leases, opening		$	(4.3	)	$	(5.0	)
	Additions due to the acquisition of Aastra			—			(1.1	)
	Write-offs			0.3			2.2
	Recoveries			—			—
	Provision			(0.1	)		(0.4	)
	Allowance for credit losses on sales-type leases, closing		$	(4.1	)	$	(4.3	)
	The amount of gross sales-type leases individually and collectively evaluated for impairment is as follows:
			March 31, 2015			December 31, 2014
	Individually evaluated for impairment
	Sales-type leases individually evaluated for impairment, gross		$	4		$	4.4
	Allowance against sales-type leases individually evaluated for impairment			(2.0	)		(2.1	)
	Sales-type leases individually evaluated for impairment, net		$	2		$	2.3
			March 31, 2015			December 31, 2014
	Collectively evaluated for impairment
	Sales-type leases collectively evaluated for impairment, gross		$	94.7		$	105.6
	Allowance against sales-type leases collectively evaluated for impairment			(2.1	)		(2.2	)
	Sales-type leases collectively evaluated for impairment, net		$	92.6		$	103.4

INVENTORIES

INVENTORIES	3 Months Ended
	Mar. 31, 2015
INVENTORIES	5. INVENTORIES
			March 31, 2015			December 31, 2014
	Raw materials and work in process		$	5.3		$	4.2
	Finished goods(1)			87.5			83
	Service inventory			6.9			6.5
	Less: provision for excess and obsolete inventory(1)			(5.8	)		(5.4	)
			$	93.9		$	88.3
	-1	At March 31, 2015, finished goods are recorded net of approximately $20.9 of historical inventory provision remaining from the acquisition of Aastra, as discussed in note 3 of the Annual Financial Statements (December 31, 2014 - $23.6). This amount will decrease as the related inventory acquired from Aastra is sold or written off.

OTHER_CURRENT_ASSETS

OTHER CURRENT ASSETS	3 Months Ended
	Mar. 31, 2015
OTHER CURRENT ASSETS	6. OTHER CURRENT ASSETS
		March 31, 2015		December 31, 2014
	Prepaid expenses and deferred charges	$	20.7	$	22.5
	Unbilled receivables		4.3		3.5
	Due from related parties (note 9)		0.5		0.4
	Income tax receivable		7.8		10.4
	Other receivables		12.8		16.1
	Restricted cash		0.3		0.3
		$	46.4	$	53.2

IDENTIFIABLE_INTANGIBLE_ASSETS

IDENTIFIABLE INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 2015
IDENTIFIABLE INTANGIBLE ASSETS	7. IDENTIFIABLE INTANGIBLE ASSETS
		March 31, 2015							December 31, 2014
		Cost		Accumulated			Net		Cost		Accumulated			Net
				amortization							amortization
	Developed technology	$	246.4	$	(110.7	)	$	135.7	$	246.4	$	(101.0	)	$	145.4
	Customer relationships		113.2		(97.7	)		15.5		113.2		(94.1	)		19.1
	Patents, trademarks and other		30.8		(20.2	)		10.6		30.5		(19.2	)		11.3
		$	390.4	$	(228.6	)	$	161.8	$	390.1	$	(214.3	)	$	175.8

ACCOUNTS_PAYABLE_AND_ACCRUED_L

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	3 Months Ended
	Mar. 31, 2015
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	8. ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
		March 31, 2015		December 31, 2014
	Trade payables	$	47.3	$	54.4
	Employee-related payables		37.8		48.2
	Accrued liabilities		53.9		58.6
	Restructuring, warranty and other provisions		25.4		31.8
	Due to related parties (note 9)		0.3		0.6
	Other payables		19.4		21.4
		$	184.1	$	215

RELATED_PARTY_TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2015
RELATED PARTY TRANSACTIONS	9. RELATED PARTY TRANSACTIONS
	The Matthews Group
	Dr. Terence Matthews (“Dr. Matthews”), a director of the Company, and certain entities controlled by Dr. Matthews (collectively, the “Matthews Group”) is a shareholder of the Company and is party to a Shareholders’ Agreement, as disclosed in note 16 to the Annual Financial Statements. Significant transactions with the Matthews Group include the following:
	Leased properties
	The Company leases its Ottawa-based headquarter facilities from the Matthews Group. During the three months ended March 31, 2015, Mitel recorded lease expense for base rent and operating costs of $1.0 (three months ended March 31, 2014—$1.4).
	Other
	Other sales to and purchases from companies related to the Matthews Group arising in the normal course of the Company’s business were $1.1 and $0.5, respectively, for the three months ended March 31, 2015 (three months ended March 31, 2014—$0.4 and $2.2, respectively).
	The amounts receivable and payable as a result of all of the above transactions are included in note 6 and note 8, respectively.

LONGTERM_DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2015
LONG-TERM DEBT	10. LONG-TERM DEBT
	April 2015 acquisition of Mavenir
	In conjunction with the acquisition of Mavenir Systems, Inc. (“Mavenir”) on April 29, 2015, we refinanced our credit facilities, as described in note 21.
	February 2015 voluntary debt repayment
	In February 2015, Mitel made a voluntary prepayment of $25.0 on its term loan. As a result, the Company recorded debt retirement costs of $0.7 in the first quarter of 2015 for the write-off of the pro-rata portion of unamortized debt issue costs and original issue discount.
	January 2014 refinancing
	On January 31, 2014, in conjunction with the acquisition of Aastra, as described in note 3, Mitel refinanced its senior secured credit facilities. The new credit facilities initially consisted of a $355.0 term loan and a $50.0 revolving facility (the “January 2014 Credit Facilities”). Proceeds of $353.2 (net of original discount of $1.8), along with cash on hand, were used to repay the remaining $258.5 outstanding on the prior credit facilities, the $80.0 of cash consideration paid for the acquisition of Aastra, as well as fees and expenses in connection with the refinancing and the acquisition of Aastra.
	Total fees and expenses related to the January 2014 Credit Facilities of $11.0 have been deferred and are included in other non-current assets. The deferred debt issue costs are being amortized over the term of the credit facilities using the effective interest method when related to the term loan and the straight-line method when related to the revolving facility. Original issue discount of $1.8 has been recorded net against the term loan and is being amortized over the term of the credit facilities using the effective interest method. In addition, the Company expensed $10.0 of unamortized debt issue costs and unamortized original issue discount relating to the prior credit facilities, $4.2 of prepayment fees relating to the prior credit facilities and $0.5 of other costs relating to the refinancing.
	Additional details on the January 2014 Credit Facilities are included in note 13 to the Annual Financial Statements.

PENSION_PLANS

PENSION PLANS	3 Months Ended
	Mar. 31, 2015
PENSION PLANS	11. PENSION PLANS
	The Company and its subsidiaries maintain defined contribution pension plans that cover a significant number of employees. In addition, the Company maintains defined benefit pension plans primarily in the U.K., France and Germany as well as a multiple-employer defined benefit pension plan in Switzerland. At March 31, 2015, the pension liability was $159.6 (December 31, 2014—$136.1). The increase in liability from December 31, 2014 was primarily due to an increase in the U.K. and Switzerland pension plan liabilities due to updated pension valuations. At March 31, 2015, the U.K. and Switzerland pension plan valuations from December 31, 2014 were updated for actual investment performance and certain changes in assumptions. The increases in the pension liabilities were primarily due to increases in the accrued benefits obligations resulting from a decrease in discount rates since December 31, 2014. The discount rate assumptions were determined on a consistent basis and reflect prevailing rates available on high-quality, fixed income debt instruments.
	The Company’s net periodic benefit cost was as follows:
			Three Months Ended
			March 31,			March 31,
			2015			2014
	Defined contribution plans
	Contribution expense		$	3.2		$	2.7
	Defined benefit plans
	Current service cost			0.8			0.5
	Interest cost			2.9			3.1
	Expected return on plan assets			(2.7	)		(2.9	)
	Recognized actuarial loss(1)			0.5			0.2
	Total periodic benefit cost, net		$	4.7		$	3.6
	-1	Recognized actuarial loss represents the amortization of unrecognized actuarial loss out of accumulated other comprehensive loss into operating expenses, primarily selling, general and administrative expense.

COMMITMENTS_GUARANTEES_AND_CON

COMMITMENTS, GUARANTEES AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2015
COMMITMENTS, GUARANTEES AND CONTINGENCIES	12. COMMITMENTS, GUARANTEES AND CONTINGENCIES
	Intellectual Property Indemnification Obligations
	The Company enters into agreements on a regular basis with customers and suppliers that include limited intellectual property indemnification obligations that are customary in the industry. These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third party intellectual property claims arising from these transactions. The nature of these intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers and suppliers. Historically, the Company has not made any significant indemnification payments under such agreements and no amount has been accrued in the Interim Financial Statements with respect to these guarantees.
	Contingencies
	The Company is party to a small number of legal proceedings, claims or potential claims arising in the normal course of business. The Company’s management and legal counsel estimates that any monetary liability or financial impact of such claims or potential claims to which the Company might be subject after final adjudication would not be material to the consolidated financial position of the Company, its results of operations or its cash flows. In circumstances where the outcome of the lawsuit is expected to be unfavorable, the Company has recorded a provision for the expected settlement amount. Where the expected settlement amount is a range, the Company has provided for the best estimate within that range. If no amount within the range is more likely, then the Company has provided for the minimum amount of the range.
	Letters of Credit and Guarantees
	Requests for providing commitments to extend credit and financial guarantees are reviewed and approved by management. Management regularly reviews all outstanding commitments, letters of credit and financial guarantees, and the results of these reviews are considered in assessing the adequacy of the Company’s reserve for possible credit and guarantee losses. Letters of credit, bank guarantees and other similar instruments amounted to $3.7 as of March 31, 2015 (December 31, 2014 — $4.0). The estimated fair value of letters of credit, bank guarantees and similar instruments, which is equal to the fees paid to obtain the obligations, was not significant as of March 31, 2015 and December 31, 2014.

SHARE_CAPITAL

SHARE CAPITAL	3 Months Ended
	Mar. 31, 2015
SHARE CAPITAL	13. SHARE CAPITAL
	Share Capital
	At March 31, 2015 and December 31, 2014, the Company’s authorized capital stock consisted of an unlimited number of common shares and an unlimited number of preferred shares. The holders of common shares are entitled to one vote per share and are entitled to dividends when and if declared by the Board of Directors.
	Stock Options
	Following is a summary of the Company’s stock option activity (in millions, except per option amounts):
			Three Months Ended March 31, 2015						Three Months Ended March 31, 2014
			Number of			Weighted Average			Number of			Weighted Average
			Options			Exercise Price			Options			Exercise Price
						per Option						per Option
	Outstanding options:
	Balance, beginning of period			6.8		$	6.12			7.2		$	5.1
	Granted			1		$	9.7			0.3		$	8.79
	Exercised			(0.1	)	$	7			(0.3	)	$	4.9
	Forfeited			(0.2	)	$	5.56			—	(1)	$	4.57
	Expired			—	(1)	$	10.24			—	(1)	$	7.61
	Balance, end of period			7.5		$	6.58			7.2		$	5.28
	Number of options exercisable			4		$	5.87			4.4		$	5.38
	-1	Number of options is less than 0.1 for the period.
	The Company used the Black-Scholes option-pricing model to determine the fair value of the stock option grants during the period. The assumptions used are summarized as follows:
			Three Months Ended
			March 31, 2015			March 31, 2014
	Number of options granted			1			0.3
	Risk-free interest rate			1.6	%		1.5	%
	Dividends			0	%		0	%
	Expected volatility			52	%		55	%
	Annual forfeiture rate			10	%		10	%
	Expected life of the options			5 years			5 years
	Weighted average fair value per option		$	4.49		$	4.06
	In addition, the Company granted 1.0 million restricted stock units in the three months ended March 31, 2015 (three months ended March 31, 2014 —nil). At March 31, 2015, 1.6 million restricted stock units were outstanding.
	The number of stock-based awards available for grant under the Company’s 2014 Equity Incentive Plan at March 31, 2015 was 6.4 million (December 31, 2014—8.3 million).

WARRANTS

WARRANTS	3 Months Ended
	Mar. 31, 2015
WARRANTS	14. WARRANTS
	The following table outlines the carrying value of warrants outstanding:
			March 31, 2015		December 31, 2014
	Warrants issued in connection with government funding(1)		$	39.1	$	39.1
	-1	At March 31, 2015, there were 2.48 million warrants outstanding that were issued in connection with government funding (December 31, 2014—2.48 million). The warrants have an exercise price of nil, are exercisable at any time at the option of the holder and have no expiry date.

WEIGHTED_AVERAGE_COMMON_SHARES

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING	3 Months Ended
	Mar. 31, 2015
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING	15. WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
	The following table sets forth the basic and diluted weighted average common shares outstanding as required for earnings per share calculations as disclosed on the consolidated statements of operations:
		Three Months Ended
		March 31,		March 31,
		2015		2014
	Weighted average common shares outstanding, basic		100.1		83.5
	Dilutive effect of options		2.1		—
	Dilutive effect of RSUs		0.1		—
	Dilutive effect of warrants		2.5		—
	Weighted average common shares outstanding, diluted		104.8		83.5
	The following securities have been excluded from the diluted weighted average common shares outstanding because they were anti-dilutive based on the exercise price of the securities:
		Three Months Ended
	(Average number outstanding, in millions)	March 31,		March 31,
		2015		2014
	Stock options		2.1		0.1
	RSUs		1.5		—
	The following securities have been excluded from the diluted weighted average common shares outstanding because they were anti-dilutive based on having a net loss attributable to common shareholders from continuing operations for the following periods:
	(Average number outstanding, in millions)	Three Months Ended
		March 31, 2014
	Stock options		6.6
	Warrants		2.5
	Restricted stock units		—
	Additionally, for the three months ended March 31, 2015, 0.5 million options (three months ended March 31, 2014–0.5 million), which could potentially dilute basic earnings per share in the future, were also excluded from the above tables since they were contingently issuable and the conditions for issuance had not been met by the end of the period.

SPECIAL_CHARGES_AND_RESTRUCTUR

SPECIAL CHARGES AND RESTRUCTURING COSTS	3 Months Ended
	Mar. 31, 2015
SPECIAL CHARGES AND RESTRUCTURING COSTS	16. SPECIAL CHARGES AND RESTRUCTURING COSTS
	Special charges and restructuring costs of $13.0 were recorded in the three months ended March 31, 2015. The costs consisted of $1.4 of employee-related charges, $5.9 of integration-related charges and $5.7 of acquisition-related charges. The employee-related charges consisted of termination and related costs in connection with headcount reductions of approximately 10 people. Integration-related charges include professional fees and incidental costs relating to the integration of Aastra. Acquisition-related charges consisted primarily of legal and advisory fees incurred related to the acquisition of Mavenir, as described in note 21.
	Special charges and restructuring costs of $13.2 were recorded in the three months ended March 31, 2014, primarily relating to the acquisition and integration of Aastra. The costs consisted of $2.2 of employee-related charges, $1.1 of facility-related charges, $4.9 of integration-related charges as well as $5.0 of acquisition-related charges. The employee-related charges consisted of headcount reductions of approximately 50 people and related costs, primarily in North America. Facility-related charges consisted primarily of lease termination obligations for facilities, primarily in North America. Integration-related charges include professional fees and incidental costs relating to the integration of Aastra. Acquisition-related charges consisted primarily of legal and advisory fees incurred to close the Aastra acquisition in January 2014.
	At March 31, 2015 the current portion of the provision of $13.7 (December 31, 2014–$19.4) is included in accounts payable and accrued liabilities while the long-term portion is included in other non-current liabilities on the consolidated balance sheet.
	The following table summarizes the change in provision:
	Description	Workforce			Facility-Reduction			Total
		Reduction			Related, Including
					Lease Termination
					Obligations
	Balance of provision as of December 31, 2013	$	1.7		$	5.4		$	7.1
	Restructuring liabilities acquired relating to the acquisition of Aastra		2			0.3			2.3
	Charges		2.2			1.1			3.3
	Cash payments		(2.3	)		(1.0	)		(3.3	)
	Balance of provision as of March 31, 2014	$	3.6		$	5.8		$	9.4
	Charges		3.9			2.8			6.7
	Cash payments		(4.6	)		(0.4	)		(5.0	)
	Balance of provision as of June 30, 2014	$	2.9		$	8.2		$	11.1
	Charges		24.7			1			25.7
	Cash payments		(7.3	)		(1.4	)		(8.7	)
	Balance of provision as of September 30, 2014	$	20.3		$	7.8		$	28.1
	Charges		6.2			0.5			6.7
	Cash payments		(11.0	)		(0.7	)		(11.7	)
	Balance of provision as of December 31, 2014	$	15.5		$	7.6		$	23.1
	Charges		1.4			—			1.4
	Cash payments		(6.6	)		(1.3	)		(7.9	)
	Balance of provision as of March 31, 2015	$	10.3		$	6.3		$	16.6

SEGMENT_INFORMATION

SEGMENT INFORMATION	3 Months Ended
	Mar. 31, 2015
SEGMENT INFORMATION	17. SEGMENT INFORMATION
	The Company reports its financial performance based on two segments, Premise and Cloud.
	The Premise segment sells and supports products and services for premise-based customers. This includes the Company’s premise-based IP and TDM telephony platforms, desktop devices and unified communications and collaboration (“UCC”) and contact centre applications that are deployed on the customer’s premise. Premise-based sales are typically sold as an initial sale of hardware and software, with ongoing recurring revenue from hardware and software maintenance and other managed services that we may also offer.
	The Cloud segment sells and supports products that are deployed in a cloud environment. The Cloud segment is comprised of a retail offering and a wholesale offering. The retail cloud offering, branded MiCloud, provides hosted cloud and related services directly to the end user. The Company is typically paid a monthly recurring fee for these services, which include UCC applications, voice and data telecommunications and desktop devices. The wholesale offering, branded Powered by Mitel, enables service providers to provide a range of hosted communications offerings to their end customers. The hosted offering includes hosted PBX, voice and video calling, SIP Trunking, voicemail, call center, audio conferencing and video and web collaboration services. The wholesale cloud offering is also sold to large enterprise customers who run their own data centers in private cloud or hybrid cloud networks with management provided by Mitel, or one of Mitel’s channel partners. Revenue in the wholesale cloud offering is billed either as monthly recurring fees or as an upfront sale of hardware and software.
	The following table presents the results of operations for the Company’s segments:
			Three Months Ended
			March 31,		March 31,
			2015		2014
	Revenues
	Premise segment – product		$	150.1	$	159.8
	Premise segment – service			63.4		55.9
	Cloud segment – product			10.6		6.7
	Cloud segment – non-recurring service			0.7		—
	Cloud segment – recurring service			23.3		19.1
	Total		$	248.1	$	241.5
	Gross margin
	Premise segment – product		$	86	$	95.3
	Premise segment – service			27.5		21.6
	Cloud segment – product			5.6		3.2
	Cloud segment – non-recurring service			0.3		—
	Cloud segment – recurring service			11		9.3
	Total		$	130.4	$	129.4
	Geographic information
	The Company now reports revenues by geographic location as follows:
		•		Americas, consisting of the continents of North America and South America;
		•		EMEA, consisting of the continent of Europe, including Russia, as well as the Middle East and Africa; and
		•		Asia-Pacific, consisting of the continent of Asia and the Pacific region, including Australia and New Zealand.
	Revenues from external customers are attributed to the following geographic locations based on location of the customers.
			Three Months Ended
			March 31,		March 31,
			2015		2014
	Canada		$	10	$	10.2
	United States			101.4		104.8
	Rest of Americas			4.2		4.3
	Americas			115.6		119.3
	Germany			25.9		22.7
	U.K.			26.6		31.3
	Rest of EMEA			73.9		61
	EMEA			126.4		115
	Asia-Pacific			6.1		7.2
			$	248.1	$	241.5

SUPPLEMENTARY_CASH_FLOW_INFORM

SUPPLEMENTARY CASH FLOW INFORMATION	3 Months Ended
	Mar. 31, 2015
SUPPLEMENTARY CASH FLOW INFORMATION	18. SUPPLEMENTARY CASH FLOW INFORMATION
		Three Months Ended
		March 31,			March 31,
		2015			2014
	Changes in non-cash operating assets and liabilities:
	Accounts receivable and sales-type lease receivables	$	36.5		$	(2.6	)
	Inventories		(7.2	)		7.8
	Other current assets		5.2			4.4
	Other non-current assets		3.4			0.8
	Accounts payable and accrued liabilities		(41.9	)		(1.5	)
	Deferred revenue		2.2			6.2
	Other non-current liabilities		(1.7	)		(0.5	)
	Change in pension liability		(0.7	)		(1.0	)
		$	(4.2	)	$	13.6
	Other items:
	Interest payments	$	6.9		$	4.3
	Income tax payments	$	1.6		$	4.2
	Property and equipment additions financed through capital lease	$	1.5		$	1.2
	Cash and cash equivalents at March 31, 2015 consisted of cash of $100.8 (December 31, 2014—$110.0) and cash equivalents of nil (December 31, 2014—$1.3).

HEDGING_ACTIVITIES

HEDGING ACTIVITIES	3 Months Ended
	Mar. 31, 2015
HEDGING ACTIVITIES	19. HEDGING ACTIVITIES
	Foreign currency risk
	The Company operates globally, and therefore incurs expenses in currencies other than its various functional currencies and its U.S. dollar reporting currency. The Company has used, and may use in the future, foreign currency forward contracts to hedge the fair value of certain assets and liabilities as well as to hedge likely future cash flows denominated in a currency other than the functional currency of the entity. The Company does not enter into forward contracts for speculative purposes.
	Fair value hedging
	At March 31, 2015, to hedge the fair value of certain assets and liabilities, the Company held forward contracts to sell Euros, Swiss francs and Danish kroner and to buy Swedish kronor and U.S. dollars at a fixed rate on a total notional amount of $20.3 U.S. dollars. At March 31, 2015, the Company had a net unrealized loss on fair value adjustments on the outstanding forward contracts used for fair value hedging of $0.6.
	The Company did not have any forward contracts used for fair value hedging outstanding at December 31, 2014.
	Cash flow hedging
	The Company did not have any forward contracts used for cash flow hedging outstanding at March 31, 2015.
	At December 31, 2014, to hedge probable future cash outflows of Canadian payroll, the Company held forward contracts with durations of up to three months to buy Canadian dollars and sell U.S. dollars on a notional amount of $10.2 U.S. dollars. At December 31, 2014, the Company had a net unrealized loss on fair value adjustments on the outstanding forward contracts used for cash flow hedging of less than $0.1.

OTHER_INCOME

OTHER INCOME	3 Months Ended
	Mar. 31, 2015
OTHER INCOME	20. OTHER INCOME
	Other income for the three months ended March 31, 2015 includes a foreign exchange gain of $14.7 (three months ended March 31, 2104 – foreign exchange loss of $0.3). The foreign exchange gain related primarily to intercompany balances and was fully offset by foreign currency translation adjustments recorded in other comprehensive loss, resulting in no net economic effect to the Company.

SUBSEQUENT_EVENT

SUBSEQUENT EVENT	3 Months Ended
	Mar. 31, 2015
SUBSEQUENT EVENT	21. SUBSEQUENT EVENT
	a) Acquisition of Mavenir
	On February 28, 2015, Mitel and Mavenir Systems, Inc. (“Mavenir”) (NYSE:MVNR) entered into an Agreement and Plan of Merger under which Mitel agreed to acquire all of the outstanding shares of common stock of Mavenir in a cash and stock transaction. Mavenir is a global provider of software-based networking solutions for mobile carriers, with annual revenues of $129.8 for the year ended December 31, 2014. The transaction was completed on April 29, 2015.
	The aggregate consideration paid by Mitel in connection with the acquisition was $541.2, consisting of $352.0 of cash, which includes approximately $28.1 paid in relation to the cash-out of in-the-money, vested Mavenir stock options and 19.7 million Mitel common shares valued at $189.2 based on the closing price of a Mitel common share on the NASDAQ stock market on April 28, 2015. In addition, out-of-the-money and unvested Mavenir options were rolled over into 2.5 million Mitel stock options with economically equivalent terms. Mitel management believes the acquisition will provide the Company with growth opportunities in the telephony application server market , in particular, in relation to Voice over LTE (“VoLTE”), will expand our current mobile service provider relationships and will extend our voice expertise from fixed-line to mobility. Management expects the transaction will also allow the Company to leverage the research and development workforce acquired, as well as realize synergies. These factors are expected to contribute to the recognition of goodwill for the acquisition.
	As the transaction was recently completed, the initial accounting for the acquisition, including estimating the fair values of assets and liabilities acquired and pro-forma income statement disclosures, has not been completed.
	b) Refinancing of credit facilities
	In conjunction with the acquisition of Mavenir, Mitel refinanced its January 2014 Credit Facilities. The new credit facilities consist of a $660.0 term loan and a $50.0 revolving facility (the “April 2015 Credit Facilities”). Proceeds of $653.4 (net of original discount of $6.6), along with cash on hand, were used to repay the remaining $279.1 principal outstanding under the January 2014 Credit Facilities, to repay the remaining $26.9 principal outstanding under Mavenir’s credit facilities, for the $352.0 of cash consideration paid for the acquisition of Mavenir, including approximately $28.1 to cash-out outstanding and vested in-the-money Mavenir stock options, as well as accrued interest, fees and expenses in connection with the refinancing and the acquisition of Mavenir.
	The undrawn $50.0 revolving credit facility bears interest at LIBOR plus and applicable margin, which is initially 4.0%, or, at the option of the Company, a base rate plus an applicable margin, and matures in April 2020. The Company may borrow Canadian dollars under the revolving credit facility. Such borrowings bear interest at the Canadian prime rate plus an applicable margin. The $660.0 term loan bears interest at LIBOR (subject to a 1.0% floor) plus and applicable margin, which is initially 4.0%, or, at the option of the Company, a base rate plus an applicable margin, and matures in April 2022. The term loan requires quarterly principal repayments of 0.25% of the original outstanding principal.
	The Company is also required to make annual principal repayments on the term loan based on a percentage of excess cash flow (as defined in the April 2015 Credit Facilities). The annual excess cash flow repayments are required to be paid within 100 days of the end of the fiscal year. The first annual excess cash flow payment is required be paid within 100 days of December 31, 2016.
	The Company may prepay the term loan at a premium of 1% over the principal amount within the first six months using proceeds from a refinancing. Otherwise, the term loan can be repaid without premium or penalty. The April 2015 Credit Facilities have customary default clauses, such that repayment of the credit facilities may be accelerated in the event of an uncured default. The proceeds from the issuance of debt, and proceeds from the sale of Company assets, may also be required to be used, in whole or in part, to make mandatory prepayments under the April 2015 Credit Facilities.
	The April 2015 Credit Facilities contain affirmative and negative covenants, including: (a) periodic financial reporting requirements, (b) a maximum ratio of Consolidated Total Debt (net of up to $75.0 of unrestricted cash) to the trailing twelve months of Consolidated EBITDA, as specified in the April 2015 Credit Facilities (“Leverage Ratio”), (c) limitations on the incurrence of subsidiary indebtedness and also the borrowers themselves, (d) limitations on liens, (e) limitations on investments, (f) limitations on the payment of dividends and (g) limitations on capital expenditures. The maximum Leverage Ratio applies to the Company for the period ending September 30, 2015 and for all fiscal quarters thereafter until maturity, and is as follows:
	Fiscal Quarters Ending	Maximum Consolidated
		Leverage Ratio
	September 30, 2015 through September 30, 2016		4.25:1.00
	December 31, 2016 through September 30, 2017		3.25:1.00
	December 31, 2017 through September 30, 2018		3.00:1.00
	December 31, 2018 through September 30, 2019		2.75:1.00
	December 31, 2019 and thereafter		2.50:1.00

SIGNIFICANT_ACCOUNTING_POLICIE1

SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2015
Recently issued accounting pronouncements	Recently issued accounting pronouncements
	Other than the accounting pronouncements below, there have been no recent accounting pronouncements that are expected to have a significant effect on the consolidated financial statements.
	Revenue recognition
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09 to provide a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The ASU adds a Revenue from Contracts with Customers subtopic to the FASB ASC and supersedes most current revenue recognition guidance, including industry-specific guidance. The amendment becomes effective for the Company in the first quarter of 2017 and early adoption is not permitted. The Company is currently evaluating the effect that the adoption of this ASU will have on its consolidated financial statements.
	Going concern assessment and disclosure requirements
	In May 2014, the FASB issued ASU 2014-15 to provide guidance in relation to management’s assessment of an entity’s ability to continue as a going concern and to provide disclosure requirements in certain circumstances. The amendment becomes effective for the Company in the first quarter of 2016. The Company does not expect the adoption to have a material impact on its consolidated financial statements.
	Classification of debt issue costs
	In April 2015, the FASB issued ASU 2015-03 to require debt issue costs, related to a recognized debt liability, be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The amendment becomes effective for the Company in the first quarter of 2016. The Company expects the adoption to result in the reclassification of debt issue costs from other non-current assets to being recorded net against long-term debt on the consolidated balance sheet.

ACQUISITIONS_Tables

ACQUISITIONS (Tables) (Aastra Technologies Limited)	3 Months Ended
	Mar. 31, 2015
Aastra Technologies Limited
Business Acquisition ProForma Information	The following unaudited pro-forma financial information presents the Company’s consolidated financial results as if the acquisition had occurred at the beginning of the period:
		Three Months Ended
		March 31, 2014
	Operations
	Revenues	$	277.4
	Net loss		(30.8	)

NET_INVESTMENT_IN_SALESTYPE_LE1

NET INVESTMENT IN SALES-TYPE LEASES (Tables)	3 Months Ended
	Mar. 31, 2015
Sales-Type Leases	The following table provides detail on the sales-type leases:
			March 31, 2015									December 31, 2014
			Gross			Allowance			Net			Gross			Allowance			Net
	Lease balances included in accounts receivable		$	6.4		$	(1.1	)	$	5.3		$	7.4		$	(1.2	)	$	6.2
	Current portion of investment in sales-type leases			16.4			(0.5	)		15.9			18.6			(0.5	)		18.1
	Non-current portion of investment in sales-type leases			18.2			(0.4	)		17.8			20.1			(0.4	)		19.7
	Total unsold sales-type leases (recorded as assets, net, on the consolidated balance sheets)			41			(2.0	)		39			46.1			(2.1	)		44
	Sold rental payments remaining unbilled			57.7			(2.1	)(1)		55.6			63.9			(2.2	)(1)		61.7
	Total of sales-type leases unsold and sold		$	98.7		$	(4.1	)	$	94.6		$	110		$	(4.3	)	$	105.7
	-1	Allowance for sold rental payments is recorded as a lease recourse liability and included in other non-current liabilities on the consolidated balance sheets.
Aging Analysis of Financing Receivables	Additional disclosures on the credit quality of the Company’s sold and unsold sales-type leases and lease balances included in accounts receivable are as follows:
	Aging Analysis as of March 31, 2015
			Not past due			1-90 days			Greater than			Total past			Total sales-type
						past due			90 days past			due			leases
									due
	Lease balances included in accounts receivable		$	3.3		$	1.7		$	1.4		$	3.1		$	6.4
	Investment in sold and unsold sales-type lease receivables			80.8			10.6			0.9			11.5			92.3
	Total gross sales-type leases			84.1			12.3			2.3			14.6			98.7
	Allowance			(1.8	)		(0.8	)		(1.5	)		(2.3	)		(4.1	)
	Total net sales-type leases		$	82.3		$	11.5		$	0.8		$	12.3		$	94.6
	Aging Analysis as of December 31, 2014
			Not past due			1-90 days			Greater than			Total past			Total sales-type
						past due			90 days past			due			leases
									due
	Lease balances included in accounts receivable		$	4.3		$	1.8		$	1.3		$	3.1		$	7.4
	Investment in sold and unsold sales-type lease receivables			92.3			9.5			0.8			10.3			102.6
	Total gross sales-type leases			96.6			11.3			2.1			13.4			110
	Allowance			(2.0	)		(1.0	)		(1.3	)		(2.3	)		(4.3	)
	Total net sales-type leases		$	94.6		$	10.3		$	0.8		$	11.1		$	105.7
Activity of Allowance for Credit Losses on Sales-Type Leases	The following table shows the activity of the allowance for credit losses on sales-type leases:
			Three Months			Year Ended
			Ended			December 31,
			March 31, 2015			2014
	Allowance for credit losses on sales-type leases, opening		$	(4.3	)	$	(5.0	)
	Additions due to the acquisition of Aastra			—			(1.1	)
	Write-offs			0.3			2.2
	Recoveries			—			—
	Provision			(0.1	)		(0.4	)
	Allowance for credit losses on sales-type leases, closing		$	(4.1	)	$	(4.3	)
Gross Sales-Type Leases Individually and Collectively Evaluated for Impairment	The amount of gross sales-type leases individually and collectively evaluated for impairment is as follows:
			March 31, 2015			December 31, 2014
	Individually evaluated for impairment
	Sales-type leases individually evaluated for impairment, gross		$	4		$	4.4
	Allowance against sales-type leases individually evaluated for impairment			(2.0	)		(2.1	)
	Sales-type leases individually evaluated for impairment, net		$	2		$	2.3
			March 31, 2015			December 31, 2014
	Collectively evaluated for impairment
	Sales-type leases collectively evaluated for impairment, gross		$	94.7		$	105.6
	Allowance against sales-type leases collectively evaluated for impairment			(2.1	)		(2.2	)
	Sales-type leases collectively evaluated for impairment, net		$	92.6		$	103.4

INVENTORIES_Tables

INVENTORIES (Tables)	3 Months Ended
	Mar. 31, 2015
Inventories
			March 31, 2015			December 31, 2014
	Raw materials and work in process		$	5.3		$	4.2
	Finished goods(1)			87.5			83
	Service inventory			6.9			6.5
	Less: provision for excess and obsolete inventory(1)			(5.8	)		(5.4	)
			$	93.9		$	88.3
	-1	At March 31, 2015, finished goods are recorded net of approximately $20.9 of historical inventory provision remaining from the acquisition of Aastra, as discussed in note 3 of the Annual Financial Statements (December 31, 2014 - $23.6). This amount will decrease as the related inventory acquired from Aastra is sold or written off.

OTHER_CURRENT_ASSETS_Tables

OTHER CURRENT ASSETS (Tables)	3 Months Ended
	Mar. 31, 2015
Other Current Assets
		March 31, 2015		December 31, 2014
	Prepaid expenses and deferred charges	$	20.7	$	22.5
	Unbilled receivables		4.3		3.5
	Due from related parties (note 9)		0.5		0.4
	Income tax receivable		7.8		10.4
	Other receivables		12.8		16.1
	Restricted cash		0.3		0.3
		$	46.4	$	53.2

IDENTIFIABLE_INTANGIBLE_ASSETS1

IDENTIFIABLE INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2015
Identifiable Intangible Assets
		March 31, 2015							December 31, 2014
		Cost		Accumulated			Net		Cost		Accumulated			Net
				amortization							amortization
	Developed technology	$	246.4	$	(110.7	)	$	135.7	$	246.4	$	(101.0	)	$	145.4
	Customer relationships		113.2		(97.7	)		15.5		113.2		(94.1	)		19.1
	Patents, trademarks and other		30.8		(20.2	)		10.6		30.5		(19.2	)		11.3
		$	390.4	$	(228.6	)	$	161.8	$	390.1	$	(214.3	)	$	175.8

ACCOUNTS_PAYABLE_AND_ACCRUED_L1

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Tables)	3 Months Ended
	Mar. 31, 2015
Accounts Payable and Accrued Liabilities
		March 31, 2015		December 31, 2014
	Trade payables	$	47.3	$	54.4
	Employee-related payables		37.8		48.2
	Accrued liabilities		53.9		58.6
	Restructuring, warranty and other provisions		25.4		31.8
	Due to related parties (note 9)		0.3		0.6
	Other payables		19.4		21.4
		$	184.1	$	215

PENSION_PLANS_Tables

PENSION PLANS (Tables)	3 Months Ended
	Mar. 31, 2015
Net Periodic Benefit Cost	The Company’s net periodic benefit cost was as follows:
			Three Months Ended
			March 31,			March 31,
			2015			2014
	Defined contribution plans
	Contribution expense		$	3.2		$	2.7
	Defined benefit plans
	Current service cost			0.8			0.5
	Interest cost			2.9			3.1
	Expected return on plan assets			(2.7	)		(2.9	)
	Recognized actuarial loss(1)			0.5			0.2
	Total periodic benefit cost, net		$	4.7		$	3.6
	-1	Recognized actuarial loss represents the amortization of unrecognized actuarial loss out of accumulated other comprehensive loss into operating expenses, primarily selling, general and administrative expense.

SHARE_CAPITAL_Tables

SHARE CAPITAL (Tables)	3 Months Ended
	Mar. 31, 2015
Stock Option Activity	Following is a summary of the Company’s stock option activity (in millions, except per option amounts):
			Three Months Ended March 31, 2015						Three Months Ended March 31, 2014
			Number of			Weighted Average			Number of			Weighted Average
			Options			Exercise Price			Options			Exercise Price
						per Option						per Option
	Outstanding options:
	Balance, beginning of period			6.8		$	6.12			7.2		$	5.1
	Granted			1		$	9.7			0.3		$	8.79
	Exercised			(0.1	)	$	7			(0.3	)	$	4.9
	Forfeited			(0.2	)	$	5.56			—	(1)	$	4.57
	Expired			—	(1)	$	10.24			—	(1)	$	7.61
	Balance, end of period			7.5		$	6.58			7.2		$	5.28
	Number of options exercisable			4		$	5.87			4.4		$	5.38
	-1	Number of options is less than 0.1 for the period.
Black-Scholes Option-Pricing Model used to Determine Fair Value of Stock Option Grants	The Company used the Black-Scholes option-pricing model to determine the fair value of the stock option grants during the period. The assumptions used are summarized as follows:
			Three Months Ended
			March 31, 2015			March 31, 2014
	Number of options granted			1			0.3
	Risk-free interest rate			1.6	%		1.5	%
	Dividends			0	%		0	%
	Expected volatility			52	%		55	%
	Annual forfeiture rate			10	%		10	%
	Expected life of the options			5 years			5 years
	Weighted average fair value per option		$	4.49		$	4.06

WARRANTS_Tables

WARRANTS (Tables)	3 Months Ended
	Mar. 31, 2015
Carrying Value of Warrants Outstanding	The following table outlines the carrying value of warrants outstanding:
			March 31, 2015		December 31, 2014
	Warrants issued in connection with government funding(1)		$	39.1	$	39.1
	-1	At March 31, 2015, there were 2.48 million warrants outstanding that were issued in connection with government funding (December 31, 2014—2.48 million). The warrants have an exercise price of nil, are exercisable at any time at the option of the holder and have no expiry date.

WEIGHTED_AVERAGE_COMMON_SHARES1

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (Tables)	3 Months Ended
	Mar. 31, 2015
Basic and Diluted Weighted Average Common Shares Outstanding for Earnings Per Share Calculations	The following table sets forth the basic and diluted weighted average common shares outstanding as required for earnings per share calculations as disclosed on the consolidated statements of operations:
		Three Months Ended
		March 31,		March 31,
		2015		2014
	Weighted average common shares outstanding, basic		100.1		83.5
	Dilutive effect of options		2.1		—
	Dilutive effect of RSUs		0.1		—
	Dilutive effect of warrants		2.5		—
	Weighted average common shares outstanding, diluted		104.8		83.5
Exercise Price of Securities
Securities Excluded from Diluted Weighted Average Common Shares Outstanding	The following securities have been excluded from the diluted weighted average common shares outstanding because they were anti-dilutive based on the exercise price of the securities:
		Three Months Ended
	(Average number outstanding, in millions)	March 31,		March 31,
		2015		2014
	Stock options		2.1		0.1
	RSUs		1.5		—
Net loss attributable to common shareholders from continuing operations
Securities Excluded from Diluted Weighted Average Common Shares Outstanding	The following securities have been excluded from the diluted weighted average common shares outstanding because they were anti-dilutive based on having a net loss attributable to common shareholders from continuing operations for the following periods:
	(Average number outstanding, in millions)	Three Months Ended
		March 31, 2014
	Stock options		6.6
	Warrants		2.5
	Restricted stock units		—

SPECIAL_CHARGES_AND_RESTRUCTUR1

SPECIAL CHARGES AND RESTRUCTURING COSTS (Tables)	3 Months Ended
	Mar. 31, 2015
Summary of Change in Provision for Special Charges and Restructuring Costs	The following table summarizes the change in provision:
	Description	Workforce			Facility-Reduction			Total
		Reduction			Related, Including
					Lease Termination
					Obligations
	Balance of provision as of December 31, 2013	$	1.7		$	5.4		$	7.1
	Restructuring liabilities acquired relating to the acquisition of Aastra		2			0.3			2.3
	Charges		2.2			1.1			3.3
	Cash payments		(2.3	)		(1.0	)		(3.3	)
	Balance of provision as of March 31, 2014	$	3.6		$	5.8		$	9.4
	Charges		3.9			2.8			6.7
	Cash payments		(4.6	)		(0.4	)		(5.0	)
	Balance of provision as of June 30, 2014	$	2.9		$	8.2		$	11.1
	Charges		24.7			1			25.7
	Cash payments		(7.3	)		(1.4	)		(8.7	)
	Balance of provision as of September 30, 2014	$	20.3		$	7.8		$	28.1
	Charges		6.2			0.5			6.7
	Cash payments		(11.0	)		(0.7	)		(11.7	)
	Balance of provision as of December 31, 2014	$	15.5		$	7.6		$	23.1
	Charges		1.4			—			1.4
	Cash payments		(6.6	)		(1.3	)		(7.9	)
	Balance of provision as of March 31, 2015	$	10.3		$	6.3		$	16.6

SEGMENT_INFORMATION_Tables

SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2015
Results of Operations for Company's Segments	The following table presents the results of operations for the Company’s segments:
		Three Months Ended
		March 31,		March 31,
		2015		2014
	Revenues
	Premise segment – product	$	150.1	$	159.8
	Premise segment – service		63.4		55.9
	Cloud segment – product		10.6		6.7
	Cloud segment – non-recurring service		0.7		—
	Cloud segment – recurring service		23.3		19.1
	Total	$	248.1	$	241.5
	Gross margin
	Premise segment – product	$	86	$	95.3
	Premise segment – service		27.5		21.6
	Cloud segment – product		5.6		3.2
	Cloud segment – non-recurring service		0.3		—
	Cloud segment – recurring service		11		9.3
	Total	$	130.4	$	129.4
Revenues from External Customers	Revenues from external customers are attributed to the following geographic locations based on location of the customers.
		Three Months Ended
		March 31,		March 31,
		2015		2014
	Canada	$	10	$	10.2
	United States		101.4		104.8
	Rest of Americas		4.2		4.3
	Americas		115.6		119.3
	Germany		25.9		22.7
	U.K.		26.6		31.3
	Rest of EMEA		73.9		61
	EMEA		126.4		115
	Asia-Pacific		6.1		7.2
		$	248.1	$	241.5

SUPPLEMENTARY_CASH_FLOW_INFORM1

SUPPLEMENTARY CASH FLOW INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2015
Supplementary Cash Flow Information
		Three Months Ended
		March 31,			March 31,
		2015			2014
	Changes in non-cash operating assets and liabilities:
	Accounts receivable and sales-type lease receivables	$	36.5		$	(2.6	)
	Inventories		(7.2	)		7.8
	Other current assets		5.2			4.4
	Other non-current assets		3.4			0.8
	Accounts payable and accrued liabilities		(41.9	)		(1.5	)
	Deferred revenue		2.2			6.2
	Other non-current liabilities		(1.7	)		(0.5	)
	Change in pension liability		(0.7	)		(1.0	)
		$	(4.2	)	$	13.6
	Other items:
	Interest payments	$	6.9		$	4.3
	Income tax payments	$	1.6		$	4.2
	Property and equipment additions financed through capital lease	$	1.5		$	1.2

SUBSEQUENT_EVENT_Tables

SUBSEQUENT EVENT (Tables) (Period ending September 30, 2015 and for all fiscal quarters thereafter until maturity)	3 Months Ended
	Mar. 31, 2015
Period ending September 30, 2015 and for all fiscal quarters thereafter until maturity
Maximum Leverage Ratio	The maximum Leverage Ratio applies to the Company for the period ending September 30, 2015 and for all fiscal quarters thereafter until maturity, and is as follows:
	Fiscal Quarters Ending	Maximum Consolidated
		Leverage Ratio
	September 30, 2015 through September 30, 2016		4.25:1.00
	December 31, 2016 through September 30, 2017		3.25:1.00
	December 31, 2017 through September 30, 2018		3.00:1.00
	December 31, 2018 through September 30, 2019		2.75:1.00
	December 31, 2019 and thereafter		2.50:1.00

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail)	0 Months Ended	3 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2014	Mar. 31, 2015	Dec. 31, 2013	Jan. 31, 2014	Jan. 31, 2014	Dec. 31, 2013	Mar. 04, 2014	Dec. 31, 2013	Mar. 04, 2014
	Aastra Technologies Limited	Aastra Technologies Limited	Aastra Technologies Limited	Aastra Technologies Limited	Aastra Technologies Limited	Aastra Technologies Limited	Oaisys	Oaisys	Oaisys
	USD ($)	USD ($)	CAD		Valuation of Deferred Revenue Acquired	Europe	USD ($)	USD ($)
					USD ($)	Geographic Concentration Risk
						Revenue
Business Acquisition [Line Items]
Approximate revenue of acquired entity			600					$8.10
Concentration of risk						75.00%
Total value of consideration	471.3
Cash payment to acquire business	80						7.9
Payment to acquire business, shares issuable	44.2
Value of Mitel common shares issued	391.3
Equity ownership interest, percentage				100.00%					100.00%
Pro-forma amortization of intangible assets, per year		29.5
Reduction of revenue as a result of valuation of deferred revenue acquired					$1.10
Estimated effective tax rate		20.00%

ProForma_Financial_Information

Pro-Forma Financial Information (Detail) (Aastra Technologies Limited, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Aastra Technologies Limited
Business Acquisition [Line Items]
Revenues	$277.40
Net loss	($30.80)

SalesType_Leases_Detail

Sales-Type Leases (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Sales Type Lease Receivables [Line Items]
Lease balances included in accounts receivable, gross	$6.40		$7.40
Current portion of investment in sales-type leases, gross	16.4		18.6
Non-current portion of investment in sales-type leases, gross	18.2		20.1
Total unsold sales-type leases (recorded as assets, net, on the consolidated balance sheets), gross	41		46.1
Sold rental payments remaining unbilled, gross	57.7		63.9
Total of sales-type leases unsold and sold, gross	98.7		110
Lease balances included in accounts receivable, allowance	-1.1		-1.2
Current portion of investment in sales-type leases, allowance	-0.5		-0.5
Non-current portion of investment in sales-type leases, allowance	-0.4		-0.4
Total unsold sales-type leases (recorded as assets, net, on the consolidated balance sheets), allowance	-2		-2.1
Sold rental payments remaining unbilled, allowance	-2.1	[1]	-2.2	[1]
Total of sales-type leases unsold and sold, allowance	-4.1		-4.3		-5
Lease balances included in accounts receivable, net	5.3		6.2
Current portion of investment in sales-type leases, net	15.9		18.1
Non-current portion of investment in sales-type leases, net	17.8		19.7
Total unsold sales-type leases (recorded as assets, net, on the consolidated balance sheets), net	39		44
Sold rental payments remaining unbilled, net	55.6		61.7
Total of sales-type leases unsold and sold, net	$94.60		$105.70
[1]	Allowance for sold rental payments is recorded as a lease recourse liability and included in other non-current liabilities on the consolidated balance sheets.

Recovered_Sheet1

Net Investment in Sales-Type Leases - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Sales Type Lease Receivables [Line Items]
Sale of rental payments	$3.30	$4.70
Gains on sale of rental payments	$0.50	$0.80

Aging_Analysis_of_Financing_Re

Aging Analysis of Financing Receivables (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Not past due	$82.30	$94.60
1-90 days past due	11.5	10.3
Greater than 90 days past due	0.8	0.8
Total past due	12.3	11.1
Total of sales-type leases unsold and sold, net	94.6	105.7
Sales-type lease receivables not past due, allowance	-1.8	-2
Sales-type lease receivables 1-90 days past due, allowance	-0.8	-1
Sales-type lease receivables greater than 90 days past due, allowance	-1.5	-1.3
Sales-type lease receivables total past due, allowance	-2.3	-2.3
Total of sales-type leases unsold and sold, allowance	-4.1	-4.3	-5
Accounts Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Not past due	3.3	4.3
1-90 days past due	1.7	1.8
Greater than 90 days past due	1.4	1.3
Total past due	3.1	3.1
Total of sales-type leases unsold and sold, net	6.4	7.4
Investment in sold and unsold sales-type lease receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Not past due	80.8	92.3
1-90 days past due	10.6	9.5
Greater than 90 days past due	0.9	0.8
Total past due	11.5	10.3
Total of sales-type leases unsold and sold, net	92.3	102.6
Total gross sales-type leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Not past due	84.1	96.6
1-90 days past due	12.3	11.3
Greater than 90 days past due	2.3	2.1
Total past due	14.6	13.4
Total of sales-type leases unsold and sold, net	$98.70	$110

Activity_of_Allowance_for_Cred

Activity of Allowance for Credit Losses on Sales-Type Leases (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses on sales-type leases, opening	($4.30)	($5)
Additions due to the acquisition of Aastra		-1.1
Write-offs	0.3	2.2
Recoveries	0	0
Provision	-0.1	-0.4
Allowance for credit losses on sales-type leases, closing	($4.10)	($4.30)

Amount_of_Gross_SalesType_Leas

Amount of Gross Sales-Type Leases Individually and Collectively Evaluated for Impairment (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
Sales-type leases individually evaluated for impairment, gross	$4	$4.40
Allowance against sales-type leases individually evaluated for impairment	-2	-2.1
Sales-type leases individually evaluated for impairment, net	2	2.3
Sales-type leases collectively evaluated for impairment, gross	94.7	105.6
Allowance against sales-type leases collectively evaluated for impairment	-2.1	-2.2
Sales-type leases collectively evaluated for impairment, net	$92.60	$103.40

Inventories_Detail

Inventories (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Inventory [Line Items]
Raw materials and work in process	$5.30		$4.20
Finished goods	87.5	[1]	83	[1]
Service inventory	6.9		6.5
Less: provision for excess and obsolete inventory	-5.8	[1]	-5.4	[1]
Inventories, net	$93.90		$88.30
[1]	At March 31, 2015, finished goods are recorded net of approximately $20.9 of historical inventory provision remaining from the acquisition of Aastra, as discussed in note 3 of the Annual Financial Statements (December 31, 2014 - $23.6). This amount will decrease as the related inventory acquired from Aastra is sold or written off.

Inventories_Parenthetical_Deta

Inventories (Parenthetical) (Detail) (Aastra Technologies Limited, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Aastra Technologies Limited
Inventory [Line Items]
Provision for inventory	$20.90	$23.60

Other_Current_Assets_Detail

Other Current Assets (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Other Assets, Current [Line Items]
Prepaid expenses and deferred charges	$20.70	$22.50
Unbilled receivables	4.3	3.5
Due from related parties (note 9)	0.5	0.4
Income tax receivable	7.8	10.4
Other receivables	12.8	16.1
Restricted cash	0.3	0.3
Other current assets	$46.40	$53.20

Recovered_Sheet2

Identifiable Intangible Assets (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Cost	$390.40	$390.10
Accumulated amortization	-228.6	-214.3
Net	161.8	175.8
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	246.4	246.4
Accumulated amortization	-110.7	-101
Net	135.7	145.4
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	113.2	113.2
Accumulated amortization	-97.7	-94.1
Net	15.5	19.1
Patent, trademarks and other
Finite-Lived Intangible Assets [Line Items]
Cost	30.8	30.5
Accumulated amortization	-20.2	-19.2
Net	$10.60	$11.30

Recovered_Sheet3

Accounts Payable and Accrued Liabilities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Accounts Payable and Accrued Liabilities [Line Items]
Trade payables	$47.30	$54.40
Employee-related payables	37.8	48.2
Accrued liabilities	53.9	58.6
Restructuring, warranty and other provisions	25.4	31.8
Due to related parties (note 9)	0.3	0.6
Other payables	19.4	21.4
Accounts payable and accrued liabilities	$184.10	$215

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Related Party Transaction [Line Items]
Sales to related party	$1.10	$0.40
Purchases from related party	0.5	2.2
Related party | Lease Properties
Related Party Transaction [Line Items]
Lease payments for base rent and operating costs	$1	$1.40

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2014	Feb. 28, 2015
Debt Instrument [Line Items]
Repayment of term loan	$25	$259.40
Aastra Technologies Limited
Debt Instrument [Line Items]
Cash payment to acquire business			80
Term Loan
Debt Instrument [Line Items]
Voluntary repayment of term loan				25
Debt retirement costs	0.7
January 2014 Credit Facilities
Debt Instrument [Line Items]
Proceeds from new credit facilities			353.2
Debt discount amount			1.8
Total expenses related to credit facilities			11
January 2014 Credit Facilities | Term Loan
Debt Instrument [Line Items]
Debt instrument, face Amount			355
January 2014 Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, face Amount			50
February 2013 Credit Facilities
Debt Instrument [Line Items]
Repayment of term loan			258.5
Unamortized debt issue costs and original issue discount expensed			10
Debt prepayment fees			4.2
Other costs relating refinancing			$0.50

Pension_Plans_Additional_Infor

Pension Plans - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension liability	$159.60	$136.10

Net_Periodic_Benefit_Cost_Deta

Net Periodic Benefit Cost (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans, Contribution expense	$3.20		$2.70
Defined benefit plans, Current service cost	0.8		0.5
Defined benefit plans, Interest cost	2.9		3.1
Defined benefit plans, Expected return on plan assets	-2.7		-2.9
Defined benefit plans, Recognized actuarial loss	0.5	[1]	0.2	[1]
Total periodic benefit cost, net	$4.70		$3.60
[1]	Recognized actuarial loss represents the amortization of unrecognized actuarial loss out of accumulated other comprehensive loss into operating expenses, primarily selling, general and administrative expense.

Recovered_Sheet4

Commitments, Guarantees and Contingencies - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Commitments and Contingencies Disclosure [Line Items]
Letters of credit, bank guarantees and other similar instruments	$3.70	$4

Share_Capital_Additional_Infor

Share Capital - Additional Information (Detail)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Vote		Vote
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common share holders vote per share	1		1
Restricted stock units granted	1
Restricted stock units outstanding	1.6
2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options available for grant	6.4		8.3

Stock_Option_Activity_Detail

Stock Option Activity (Detail) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Number of Options
Balance, beginning of period	6.8		7.2
Granted	1		0.3
Exercised	-0.1		-0.3
Forfeited	-0.2
Expired	0	[1]	0	[1]
Balance, end of period	7.5		7.2
Number of options exercisable	4		4.4
Weighted Average Exercise Price
Balance, beginning of period	$6.12		$5.10
Granted	$9.70		$8.79
Exercised	$7		$4.90
Forfeited	$5.56		$4.57
Expired	$10.24		$7.61
Balance, end of period	$6.58		$5.28
Number of options exercisable	$5.87		$5.38
[1]	Number of options is less than 0.1 for the period.

Stock_Option_Activity_Parenthe

Stock Option Activity (Parenthetical) (Detail)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options for the period	7.5	6.8	7.2	7.2
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options for the period	0.1

Assumptions_Used_in_BlackSchol

Assumptions Used in Black-Scholes Option-Pricing Model (Detail) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted	1	0.3
Risk-free interest rate	1.60%	1.50%
Dividends	0.00%	0.00%
Expected volatility	52.00%	55.00%
Annual forfeiture rate	10.00%	10.00%
Expected life of the options	5 years	5 years
Weighted average fair value per option	$4.49	$4.06

Carrying_Value_of_Warrants_Out

Carrying Value of Warrants Outstanding (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Class of Warrant or Right [Line Items]
Warrants issued in connection with government funding	$39.10	[1]	$39.10	[1]
[1]	At March 31, 2015, there were 2.48 million warrants outstanding that were issued in connection with government funding (December 31, 2014-2.48 million). The warrants have an exercise price of nil, are exercisable at any time at the option of the holder and have no expiry date.

Carrying_Value_of_Warrants_Out1

Carrying Value of Warrants Outstanding (Parenthetical) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Class of Warrant or Right [Line Items]
Warrants, outstanding	2.48	2.48
Warrants, exercise price

Basic_and_Diluted_Weighted_Ave

Basic and Diluted Weighted Average Common Shares Outstanding for Earnings Per Share Calculations (Detail)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Weighted Average Number of Shares Outstanding [Line Items]
Weighted average common shares outstanding, basic	100.1	83.5
Dilutive effect of warrants	2.5
Weighted average common shares outstanding, diluted	104.8	83.5
Stock Options
Weighted Average Number of Shares Outstanding [Line Items]
Dilutive effect of shares	2.1
Restricted Stock Units (RSUs)
Weighted Average Number of Shares Outstanding [Line Items]
Dilutive effect of shares	0.1

Securities_Excluded_from_Compu

Securities Excluded from Computation of Diluted Earnings Per Share (Detail)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average number outstanding	2.1	0.1
Stock Options | Net loss attributable to common shareholders from continuing operations
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average number outstanding		6.6
Warrants | Net loss attributable to common shareholders from continuing operations
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average number outstanding		2.5
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average number outstanding	1.5

Recovered_Sheet5

Weighted Average Common Shares Outstanding - Additional Information (Detail)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of contingently issuable shares of stock options which could potentially dilute basic earnings per share in future periods	0.5	0.5

Recovered_Sheet6

Special Charges and Restructuring Costs - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Special charges and restructuring costs	$13	$13.20
Current provision for restructuring cost	13.7		19.4
Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Special charges and restructuring costs	1.4	2.2
Approximate number of employees terminated	10	50
Facility-Related, Including Lease Termination Obligation
Restructuring Cost and Reserve [Line Items]
Special charges and restructuring costs		1.1
Integration Related
Restructuring Cost and Reserve [Line Items]
Special charges and restructuring costs	5.9	4.9
Acquisition Related
Restructuring Cost and Reserve [Line Items]
Special charges and restructuring costs	$5.70	$5

Summary_of_Change_in_Provision

Summary of Change in Provision for Special Charges and Restructuring Costs (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Beginning balance of provision	$23.10	$28.10	$11.10	$9.40	$7.10
Restructuring liabilities acquired relating to the acquisition of Aastra					2.3
Charges	1.4	6.7	25.7	6.7	3.3
Cash payments	-7.9	-11.7	-8.7	-5	-3.3
Ending balance of provision	16.6	23.1	28.1	11.1	9.4
Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Beginning balance of provision	15.5	20.3	2.9	3.6	1.7
Restructuring liabilities acquired relating to the acquisition of Aastra					2
Charges	1.4	6.2	24.7	3.9	2.2
Cash payments	-6.6	-11	-7.3	-4.6	-2.3
Ending balance of provision	10.3	15.5	20.3	2.9	3.6
Facility-Related, Including Lease Termination Obligation
Restructuring Cost and Reserve [Line Items]
Beginning balance of provision	7.6	7.8	8.2	5.8	5.4
Restructuring liabilities acquired relating to the acquisition of Aastra					0.3
Charges		0.5	1	2.8	1.1
Cash payments	-1.3	-0.7	-1.4	-0.4	-1
Ending balance of provision	$6.30	$7.60	$7.80	$8.20	$5.80

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Entity
Segment Reporting Information [Line Items]
Number of Business Units	2

Results_of_Operations_for_Comp

Results of Operations for Company's Segments (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$248.10	$241.50
Gross margin	130.4	129.4
Product
Segment Reporting Information [Line Items]
Revenues	160.7	166.5
Services
Segment Reporting Information [Line Items]
Revenues	64.1	55.9
Premise segment | Product
Segment Reporting Information [Line Items]
Revenues	150.1	159.8
Gross margin	86	95.3
Premise segment | Services
Segment Reporting Information [Line Items]
Revenues	63.4	55.9
Gross margin	27.5	21.6
Cloud segment | Product
Segment Reporting Information [Line Items]
Revenues	10.6	6.7
Gross margin	5.6	3.2
Cloud segment | Non-recurring Service
Segment Reporting Information [Line Items]
Revenues	0.7
Gross margin	0.3
Cloud segment | Recurring Service
Segment Reporting Information [Line Items]
Revenues	23.3	19.1
Gross margin	$11	$9.30

Revenues_from_External_Custome

Revenues from External Customers (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues from External Customers [Line Items]
Revenues	$248.10	$241.50
Canada
Revenues from External Customers [Line Items]
Revenues	10	10.2
United States
Revenues from External Customers [Line Items]
Revenues	101.4	104.8
Rest of Americas
Revenues from External Customers [Line Items]
Revenues	4.2	4.3
Americas
Revenues from External Customers [Line Items]
Revenues	115.6	119.3
Germany
Revenues from External Customers [Line Items]
Revenues	25.9	22.7
U.K.
Revenues from External Customers [Line Items]
Revenues	26.6	31.3
Rest of EMEA
Revenues from External Customers [Line Items]
Revenues	73.9	61
Emea
Revenues from External Customers [Line Items]
Revenues	126.4	115
Asia-Pacific
Revenues from External Customers [Line Items]
Revenues	$6.10	$7.20

Recovered_Sheet7

Supplementary Cash Flow Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes in non-cash operating assets and liabilities:
Accounts receivable and sales-type lease receivables	$36.50	($2.60)
Inventories	-7.2	7.8
Other current assets	5.2	4.4
Other non-current assets	3.4	0.8
Accounts payable and accrued liabilities	-41.9	-1.5
Deferred revenue	2.2	6.2
Other non-current liabilities	-1.7	-0.5
Change in pension liability	-0.7	-1
Change in non-cash operating assets and liabilities	-4.2	13.6
Other items:
Interest payments	6.9	4.3
Income tax payments	1.6	4.2
Property and equipment additions financed through capital lease	$1.50	$1.20

Recovered_Sheet8

Supplementary Cash Flow Information - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Supplemental Cash Flow Information [Abstract]
Cash	$100.80	$110
Cash equivalents		$1.30

Hedging_Activities_Additional_

Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair value hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized loss on fair value adjustments on outstanding forward contracts	($0.60)
Forward contracts outstanding		0
Cash flow hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Forward contract notional amount		10.2
Forward contracts outstanding	0
Maximum | Cash flow hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized loss on fair value adjustments on outstanding forward contracts		-0.1
Forward contracts, held period		3 months
Sale contracts | Fair value hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Forward contract notional amount	$20.30

Other_Income_Additional_Inform

Other Income - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other Income Expense [Line Items]
Other income (loss)	$15.40	$0.10
Foreign Currency Gain (Loss)
Other Income Expense [Line Items]
Other income (loss)	$14.70	($0.30)

Subsequent_Event_Additional_In

Subsequent Event - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Apr. 29, 2015	Jan. 31, 2014	Dec. 31, 2014
Subsequent Event [Line Items]
Repayment of term loan	$25	$259.40
April 2015 Credit Facilities
Subsequent Event [Line Items]
New credit facility covenants unrestricted cash			75
New credit facility covenants			The April 2015 Credit Facilities contain affirmative and negative covenants, including: (a) periodic financial reporting requirements, (b) a maximum ratio of Consolidated Total Debt (net of up to $75.0 of unrestricted cash) to the trailing twelve months of Consolidated EBITDA, as specified in the April 2015 Credit Facilities (bLeverage Ratiob), (c) limitations on the incurrence of subsidiary indebtedness and also the borrowers themselves, (d) limitations on liens, (e) limitations on investments, (f) limitations on the payment of dividends and (g) limitations on capital expenditures.
January 2014 Credit Facilities
Subsequent Event [Line Items]
Proceeds from new credit facilities				353.2
Debt discount amount				1.8
January 2014 Credit Facilities | Revolving Credit Facility
Subsequent Event [Line Items]
Debt instrument, face Amount				50
January 2014 Credit Facilities | Term Loan
Subsequent Event [Line Items]
Debt instrument, face Amount				355
Subsequent Event | April 2015 Credit Facilities
Subsequent Event [Line Items]
Proceeds from new credit facilities			653.4
Debt discount amount			6.6
Subsequent Event | April 2015 Credit Facilities | Revolving Credit Facility
Subsequent Event [Line Items]
Debt instrument, face Amount			50
Debt instrument maturity month			2020-04
Subsequent Event | April 2015 Credit Facilities | Revolving Credit Facility | London Interbank Offered Rate Libor
Subsequent Event [Line Items]
Debt instrument basis spread over LIBOR rate			4.00%
Subsequent Event | April 2015 Credit Facilities | Term Loan
Subsequent Event [Line Items]
Debt instrument, face Amount			660
Debt instrument maturity month			2022-04
Long-term loan			660
LIBOR floor rate			1.00%
Term loan quarterly principal repayments percentage			0.25%
Term loans, annual principal repayments period			100 days
Prepayment of term loan at premium			1.00%
Subsequent Event | April 2015 Credit Facilities | Term Loan | London Interbank Offered Rate Libor
Subsequent Event [Line Items]
Debt instrument basis spread over LIBOR rate			4.00%
Subsequent Event | January 2014 Credit Facilities
Subsequent Event [Line Items]
Repayment of term loan			279.1
Mavenir Systems Inc
Subsequent Event [Line Items]
Approximate revenue of acquired entity					129.8
Acquisition completion date			29-Apr-15
Mavenir Systems Inc | Subsequent Event
Subsequent Event [Line Items]
Total value of consideration			541.2
Cash payment to acquire business			352
Cash payment for vested in-the-money Mavenir stock options			28.1
Mitel common shares issued			19.7
Value of Mitel common shares issued			189.2
Unvested Mavenir options rolled over to shares			2.5
Mavenir Systems Inc | Subsequent Event | Legacy Credit Facilities
Subsequent Event [Line Items]
Repayment of term loan			$26.90

Maximum_Leverage_Ratio_Under_T

Maximum Leverage Ratio Under Term Loan Agreement (Detail)	3 Months Ended
	Mar. 31, 2015
September 30, 2015 through September 30, 2016
Debt Instrument [Line Items]
Maximum Consolidated Leverage Ratio	425.00%
December 31, 2016 through September 30, 2017
Debt Instrument [Line Items]
Maximum Consolidated Leverage Ratio	325.00%
December 31, 2017 through September 30, 2018
Debt Instrument [Line Items]
Maximum Consolidated Leverage Ratio	300.00%
December 31, 2018 through September 30, 2019
Debt Instrument [Line Items]
Maximum Consolidated Leverage Ratio	275.00%
December 31, 2019 and thereafter
Debt Instrument [Line Items]
Maximum Consolidated Leverage Ratio	250.00%