GlassBridge Enterprises (GLAE) 10-K 16 Mar 15 2014 FY Annual report Financial data

DEI

DEI (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 27, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	IMATION CORP.
Entity Central Index Key	1014111
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		42,857,395
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$138.90

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Statement [Abstract]
Net revenue	$729.50	[1]	$860.80	[1]	$1,006.70
Cost of goods sold	591.1		672.1		817.4
Gross profit	138.4	[1]	188.7	[1]	189.3
Operating expenses:
Selling, general and administrative	174.7		181.6		191.1
Research and development	18.8		18.4		20.4
Intangible impairments	0		0		251.8
Litigation settlement	0		-2.5		0
Goodwill impairment	35.4		0		23.3
Restructuring and other	13.6		11.3		21.1
Total	242.5		208.8		507.7
Operating loss	-104.1	[1]	-20.1	[1]	-318.4
Other (income) expense
Interest income	-0.5		-0.2		-0.5
Interest expense	2.6		2.5		2.9
Other expense, net	3.1		0.6		2.6
Total	5.2		2.9		5
Loss from continuing operations before income taxes	-109.3		-23		-323.4
Income tax provision	3.1		1.4		1.4
Loss from continuing operations	-112.4	[1]	-24.4	[1]	-324.8
Discontinued operations:
(Loss)/gain on sale of discontinued businesses, net of income taxes	-1.7		0.9		0
Loss from discontinued operations, net of income taxes	-0.6		-20.9		-15.9
Loss from discontinued operations	-2.3	[1]	-20	[1]	-15.9
Net loss	($114.70)	[1]	($44.40)	[1]	($340.70)
Loss per common share — basic:
Continuing operations (dollars per share)	($2.74)	[1]	($0.60)	[1]	($8.67)
Discontinued operations (dollars per share)	($0.06)	[1]	($0.49)	[1]	($0.42)
Net loss (dollars per share)	($2.80)	[1]	($1.10)	[1]	($9.09)
Loss per common share — diluted:
Continuing operations (dollars per share)	($2.74)	[1]	($0.60)	[1]	($8.67)
Discontinued operations (dollars per share)	($0.06)	[1]	($0.49)	[1]	($0.42)
Net loss (dollars per share)	($2.80)	[1]	($1.10)	[1]	($9.09)
Weighted average shares outstanding:
Basic (in shares)	41		40.5		37.5
Diluted (in shares)	41		40.5		37.5
Cash dividend paid per common share (dollars per share)	$0		$0		$0
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net loss	($114.70)	[1]	($44.40)	[1]	($340.70)
Net unrealized (losses) gains on derivative financial instruments:
Net holding gains arising during the period	6.1		7		3.1
Reclassification adjustment for net realized (gains) losses recorded in net loss	-3.4		-7.3		-2
Total net unrealized (losses) gains on derivative financial instruments	2.7		-0.3		1.1
Net pension adjustments, net of tax:
Liability adjustments for defined benefit pension plans	-10.4		10.7		-4.9
Reclassification of adjustments for defined benefit plans recorded in net loss	1.4		5.5		3.9
Total net pension adjustments	-9		16.2		-1
Unrealized foreign currency translation losses	-15.7		-4.5		-1.7
Total other comprehensive income (loss), net of tax	-22		11.4		-1.6
Comprehensive loss	($136.70)		($33)		($342.30)
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets
Cash and cash equivalents	$114.60	$132.60
Accounts receivable, net	134.4	163.3
Inventories	57.7	84.3
Other current assets	32.7	48.8
Total current assets	339.4	429
Property, plant and equipment, net	45	51.6
Intangible assets, net	57.9	68.6
Goodwill	36.1	72.1
Other assets	20.8	20.5
Total assets	499.2	641.8
Current liabilities
Accounts payable	95.5	94.7
Short-term debt	18.9	20
Other current liabilities	98.2	116.4
Total current liabilities	212.6	231.1
Other liabilities	45.8	37.5
Total liabilities	258.4	268.6
Commitments and contingencies (Note 15)
Shareholders’ equity
Preferred stock, $.01 par value, authorized 25 million shares, none issued and outstanding	0	0
Common stock, $.01 par value, authorized 100 million shares, 42.9 million issued	0.4	0.4
Additional paid-in capital	1,034.60	1,047.70
Retained deficit	-699.9	-585.2
Accumulated other comprehensive loss	-84.8	-62.8
Treasury stock, at cost	-9.5	-26.9
Total shareholders’ equity	240.8	373.2
Total liabilities and shareholders’ equity	$499.20	$641.80

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred Stock, par value (dollars per share)	$0.01	$0.01
Common Stock, par value (dollars per share)	$0.01	$0.01
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common Stock, shares authorized (in shares)	100,000,000	100,000,000
Common Stock, shares issued (in shares)	42,900,000	42,900,000

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders Equity (USD $)	Total		Common Stock	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Loss	Treasury Stock
In Millions, unless otherwise specified
Beginning Balance, Stockholders' Equity at Dec. 31, 2011	$723.70		$0.40	$1,107.80	($200.10)	($72.60)	($111.80)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	-340.7				-340.7
Purchase of treasury stock	-6.5						-6.5
Restricted stock grants and other	3.4			-1			4.4
401(k) matching contribution	3			-1			4
Stock-based compensation related to options	3.6			3.6
Net change in cumulative translation adjustment	-1.7					-1.7
Pension adjustments, net of tax	-1					-1
Cash flow hedging, net of tax	1.1					1.1
Issuance of treasury stock for acquisition	15.5			-56.8			72.3
Ending Balance, Stockholders' Equity at Dec. 31, 2012	400.4		0.4	1,052.60	-540.8	-74.2	-37.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	-44.4	[1]			-44.4
Purchase of treasury stock	-2.5						-2.5
Restricted stock grants and other	3.7			-4.2			7.9
401(k) matching contribution	1.7			-3.6			5.3
Stock-based compensation related to options	2.9			2.9
Net change in cumulative translation adjustment	-4.5					-4.5
Pension adjustments, net of tax	16.2					16.2
Cash flow hedging, net of tax	-0.3					-0.3
Ending Balance, Stockholders' Equity at Dec. 31, 2013	373.2		0.4	1,047.70	-585.2	-62.8	-26.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	-114.7	[1]			-114.7
Exercise of stock options	0.4			-1.7			2.1
Purchase of treasury stock	-2.5						-2.5
Restricted stock grants and other	3.2			-10.3			13.5
401(k) matching contribution	1.8			-2.5			4.3
Stock-based compensation related to options	1.4			1.4
Net change in cumulative translation adjustment	-15.7					-15.7
Pension adjustments, net of tax	-9					-9
Cash flow hedging, net of tax	2.7					2.7
Ending Balance, Stockholders' Equity at Dec. 31, 2014	$240.80		$0.40	$1,034.60	($699.90)	($84.80)	($9.50)
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Cash Flows from Operating Activities:
Net loss	($114.70)	[1]	($44.40)	[1]	($340.70)
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	21.7		23.7		35.8
Stock-based compensation	5.3		6.9		7.3
Deferred income taxes and valuation allowance	3.2		-4.7		5.7
Goodwill, intangible and other asset impairments	37.8		7.1		285.7
Inventory write-offs	4.6		2.7		2.3
Pension settlement	0.2		12.7		2.4
Changes in fair value of contingent consideration	0		-0.6		-8.6
Gain on sale of land	0		-9.8		0
Other, net	-5		-6.9		2.9
Changes in operating assets and liabilities:
Accounts receivable	19.1		48.8		23.7
Inventories	15.5		64.2		45.8
Other assets	15.4		7.8		-9.1
Accounts payable	6.8		-63.3		-44
Accrued payroll and other liabilities	-15.5		-29.6		-17.7
Restricted cash	-2.2		7.5		0
Net cash provided by (used in) operating activities	-7.8		22.1		-8.5
Cash Flows from Investing Activities:
Capital expenditures	-5.6		-7		-10.2
Proceeds from sale of assets and business	3.4		11		1.4
Recovery of investments	0		0.2		0.9
Acquisitions, net of cash acquired	0		1.6		-103.8
Purchase of tradename	0		0		-4
Net cash provided by (used in) investing activities	-2.2		5.8		-115.7
Cash Flows from Financing Activities:
Purchase of treasury stock	-2.5		-2.5		-6.5
Debt issuance costs	0		-0.4		-2.4
Debt borrowings	38.7		4.9		25
Debt repayments	-39.2		-4.9		-5
Contingent consideration payments	0		-0.5		-1.2
Exercise of stock options	0.4		0		0
Net cash provided by (used in) financing activities	-2.6		-3.4		9.9
Effect of exchange rate changes on cash and cash equivalents	-5.4		-0.6		-0.1
Net change in cash and cash equivalents	-18		23.9		-114.4
Cash and cash equivalents — beginning of period	132.6		108.7		223.1
Cash and cash equivalents — end of period	$114.60		$132.60		$108.70
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Background_and_Basis_of_Presen

Background and Basis of Presentation	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background and Basis of Presentation	Background and Basis of Presentation
	Background
	Imation Corp., a Delaware corporation, was formed in 1996 from the spin-off of substantially all of the businesses that comprised the data storage and imaging systems groups of 3M Company. As used in this document, the terms “Imation,” “the Company,” ‘‘we,” “us,” or “our” mean Imation Corp. and its subsidiaries and consolidated entities unless the context indicates otherwise. Imation is a global data storage and data security company. With a 60-year history of technology leadership, the Company's mission is to help organizations store, protect, and connect their digital world. The Company operates in two focused business segments: Tiered Storage and Security Solutions (TSS) and Consumer Storage and Accessories (CSA). We have four major product categories: Storage and Security Solutions and Commercial Storage Media in our TSS business segment and Consumer Storage Media and Audio and Accessories in our CSA segment. Our brands include ImationTM, Nexsan® , IronKey®, TDK Life on RecordTM, TREKTM, and MemorexTM.
	Basis of Presentation
	The financial statements are presented on a consolidated basis and include the accounts of the Company and our wholly-owned subsidiaries. See Note 2 - Summary of Significant Accounting Policies for further information regarding consolidation. Our Consolidated Financial Statements are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). All significant inter-company transactions have been eliminated.
	During the fourth quarter of 2012, we announced the acceleration of our strategic transformation, including the realignment of our global business into two new business segments, a cost reduction program and our increased focus on data storage and data security including exploring strategic options for our consumer electronics brands and businesses.
	The realignment of our global business into two new business segments better aligns the Company with our key consumer and commercial channels. The two business segments consist of Consumer Storage and Accessories (CSA), which focuses mainly on retail channels; and Tiered Storage and Security Solutions (TSS), which focuses mainly on commercial channels. In the first quarter of 2013, we revised our segment reporting to reflect these changes into these two new reporting segments. See Note 14 - Business Segment Information and Geographical Data for more information on our business segments.
	In October 2012, the Board of Directors approved our Global Process Improvement Restructuring Program (GPI Program) in order to realign our business structure and significantly reduce operating expenses over time. This restructuring program addressed product line rationalization and infrastructure and included a planned reduction in our global workforce. The majority of these actions were implemented during 2013. See Note 7 - Restructuring and Other Expense for more information on this restructuring program.
	During the first quarter of 2013 we announced our plans to divest our XtremeMac and Memorex consumer electronics businesses. The divestiture of our Memorex consumer electronics business occurred on October 15, 2013 and the divestiture of our XtremeMac business occurred on January 31, 2014. See Note 4 - Acquisitions and Divestitures for further information on these divestitures. The results of operations for our XtremeMac™ and Memorex™ consumer electronics businesses are presented in our Consolidated Statements of Operations as discontinued operations for all periods presented. The consumer storage business under the Memorex and TDK Life on Record brands and the consumer electronics business under the TDK Life on Record brand are being retained.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported asset and liability amounts and the contingent asset and liability disclosures at the date of the financial statements, as well as the revenue and expense amounts reported during the period. Actual results could differ from those estimates.
	Foreign Currency. For our international operations, where the local currency has been determined to be the functional currency, assets and liabilities are translated at year-end exchange rates with cumulative translation adjustments included as a component of shareholders’ equity. Income and expense items are translated at average foreign exchange rates prevailing during the year. Gains and losses from foreign currency transactions are included in our Consolidated Statements of Operations.
	Cash Equivalents. Cash equivalents consist of highly liquid investments with an original maturity of three months or less at the time of purchase. The carrying amounts reported in our Consolidated Balance Sheets for cash equivalents approximate fair value.
	Restricted Cash. Cash related to contractual obligations or restricted by management for specific use is classified as restricted and is included in other assets on our Consolidated Balance Sheets. We had $2.2 million of restricted cash as of December 31, 2014 and had no restricted cash as of December 31, 2013.
	Trade Accounts Receivable and Allowances. Trade accounts receivable are stated net of estimated allowances, which primarily represent estimated amounts associated with customer returns, discounts on payment terms and the inability of certain customers to make the required payments. When determining the allowances, we take several factors into consideration, including prior history of accounts receivable credit activity and write-offs, the overall composition of accounts receivable aging, the types of customers and our day-to-day knowledge of specific customers. Changes in the allowances are recorded as reductions of net revenue or as bad debt expense (included in selling, general and administrative expense), as appropriate, in our Consolidated Statements of Operations. In general, accounts which have entered into an insolvency action, have been returned by a collection agency as uncollectible or whose existence can no longer be confirmed are written off in full and both the receivable and the associated allowance are removed from our Consolidated Balance Sheet. If, subsequent to the write-off, a portion of the account is recovered, it is recorded as a reduction of bad debt expense in our Consolidated Statements of Operations at the time cash is received.
	Inventories. Inventories are valued at the lower of cost or market, with cost determined on a first-in, first-out basis. We provide estimated inventory write-downs for excess, slow-moving and obsolete inventory as well as inventory with a carrying value in excess of estimated net realizable value.
	Derivative Financial Instruments. We recognize all derivatives on the balance sheet at their estimated fair value. Fair value of our derivative contracts with durations of twelve months or less are classified as current and durations of greater than twelve months as non-current. Changes in the estimated fair value of derivatives that are not designated as, and qualify for, hedge accounting are recorded in our results of operations. We do not hold or issue derivative financial instruments for speculative or trading purposes, and we are not a party to leveraged derivatives. If a derivative is designated as, and qualifies for, hedge accounting, depending on the nature of the hedge, changes in the fair value of the derivative are either offset against the change in fair value of the underlying assets or liabilities through operations or recognized in accumulated other comprehensive loss in shareholders’ equity until the underlying hedged item is recognized in operations. These gains and losses are generally recognized as an adjustment to cost of goods sold for inventory-related hedge transactions, or as adjustments to foreign currency transaction gains or losses included in non-operating expenses for foreign denominated payables- and receivables-related hedge transactions. Cash flows attributable to these derivatives are included with cash flows of the associated hedged items. The ineffective portion of a derivative’s change in fair value is immediately recognized in our Consolidated Statements of Operations. See Note 12 - Fair Value Measurements for more information on our derivative financial instruments.
	Property, Plant and Equipment. Property, plant and equipment, including leasehold and other improvements that extend an asset’s useful life or productive capabilities, are recorded at cost. Maintenance and repairs are expensed as incurred. The cost and related accumulated depreciation of assets sold or otherwise disposed are removed from the related accounts, and the gains or losses are reflected in the results of operations.
	Property, plant and equipment are generally depreciated on a straight-line basis over their estimated useful lives. The estimated depreciable lives range from 10 to 20 years for buildings and 5 to 10 years for machinery and equipment. Leasehold and other improvements are amortized over the remaining life of the lease or the estimated useful life of the improvement, whichever is shorter. Depreciation expense from continuing operations was $8.8 million, $9.4 million and $7.5 million for 2014, 2013 and 2012, respectively.
	Intangible Assets. Intangible assets include principally trade names and customer relationships and are amortized using methods that approximate the benefit provided by utilization of the assets, which may be on a straight-line or accelerated basis depending on the intangible asset.
	We record all assets and liabilities acquired in purchase acquisitions, including intangibles, at estimated fair value. The initial recognition of intangible assets, the determination of useful lives and, if necessary, subsequent impairment analyses require management to make subjective estimates of how the acquired assets will perform in the future using certain valuation methods. See Note 6 - Intangible Assets and Goodwill for further information on our intangible assets and impairment testing.
	We capitalize costs of software developed or obtained for internal use, once the preliminary project stage has been completed, management commits to funding the project and it is probable that the project will be completed and the software will be used to perform the function intended. Capitalized costs include only (1) external direct costs of materials and services consumed in developing or obtaining internal-use software, (2) payroll and payroll-related costs for employees who are directly associated with and who devote time to the internal-use software project and (3) interest costs incurred, when material, while developing internal-use software. Capitalization of costs ceases when the project is substantially complete and ready for its intended use.
	Goodwill.  Goodwill is the excess of the cost of an acquired entity over the estimated fair value of assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually as of November 30th, or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Goodwill is considered impaired when its carrying amount exceeds its implied fair value. The Company may assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount, including goodwill. If we determine in this assessment that the fair value of the reporting unit is more than its carrying amount we may conclude that there is no need to perform Step 1 of the impairment test. We have an unconditional option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing Step 1 of the goodwill impairment test.
	Step 1 of the impairment test involves comparing the fair value of the reporting unit to which goodwill was assigned to its carrying amount. If fair value is deemed to be less than carrying value, Step 2 of the impairment test compares the implied fair value of the reporting unit's goodwill with the carrying amount of the reporting unit's goodwill. If the carrying amount of the reporting unit's goodwill is greater than the implied fair value of the reporting unit's goodwill, an impairment loss must be recognized for the excess. This involves measuring the fair value of the reporting unit's assets and liabilities (both recognized and unrecognized) at the time of the impairment test. The difference between the reporting unit's fair value and the fair values assigned to the reporting unit's individual assets and liabilities is the implied fair value of the reporting unit's goodwill. See Note 6 - Intangible Assets and Goodwill for further information on our goodwill and impairment testing.
	Impairment of Long-Lived Assets.  We periodically review the carrying value of our property and equipment and our intangible assets to test whether current events or circumstances indicate that such carrying value may not be recoverable. For the testing of long-lived assets that are "held for use," if the tests indicate that the carrying value of the asset group that contains the long-lived asset being evaluated is greater than the expected undiscounted cash flows to be generated by such asset or asset group, an impairment loss would be recognized. The impairment loss is determined by the amount by which the carrying value of such asset group exceeds its estimated fair value. We generally measure fair value by considering sale prices for similar assets or by discounting estimated future cash flows from such assets using an appropriate discount rate. See Note 6 - Intangible Assets and Goodwill for further information on impairment testing.
	Assets to be disposed of and qualify as being "held for sale" are carried at the lower of their carrying value or fair value less costs to sell. Management judgment is necessary to estimate the fair value of assets and, accordingly, actual results could vary significantly from such estimates.
	Revenue Recognition.  We sell a wide range of data storage, mobile security and consumer storage solutions audio products and accessories. Net revenue consists primarily of data storage, mobile security, magnetic, optical, flash media, consumer electronics and accessories sales. We recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred, installation has been completed (if applicable) or services have been rendered, fees are fixed or determinable and collectability is reasonably assured. For product sales, delivery is considered to have occurred when the risks and rewards of ownership transfer to the customer. For inventory maintained at the customer site, revenue is recognized at the time these products are sold by the customer. We base our estimates for returns on historical experience and have not experienced significant fluctuations between estimated and actual return activity. Non-income based taxes collected from customers are also recorded as revenue and include levies and various excise taxes, mainly in non-U.S. jurisdictions. These taxes included in revenue in 2014, 2013, and 2012 were $7.1 million, $10.3 million, and $13.8 million, respectively.
	The majority of the Company’s Storage and Security Solutions products have both software and non-software components that together deliver the products’ essential functionality. The software is embedded within the hardware and sold together as a single storage solution to the customer. Accordingly, the software and non-software components do not qualify as separate units of accounting as prescribed in Accounting Standards Codification (ASC) 605-25 and are combined as a single unit of accounting. There are no situations where revenue is recognized separately for software.
	We also offer services in conjunction with our Storage and Security Solutions products which may include installation, training, hardware maintenance and software support. For such services that are determined to be essential to the functionality of the product, such as certain installation services, the product and services do not qualify as separate units of accounting as prescribed in ASC 605-25 and are combined as a single unit of accounting. In situations where the sale of our Storage and Security Solutions products and associated services qualify as multiple element arrangements, we allocate arrangement consideration to each unit of accounting based on its relative selling price, and revenue is recognized for each element when all of the criteria for revenue recognition for such elements have been met. Revenue from services is not a significant component of total consolidated revenues.
	Revenue associated with stand-alone service arrangements (such as maintenance arrangements) that are sold separately is recorded ratably over the service period.
	Rebates that are provided to our customers are accounted for as a reduction of revenue at the time of sale based on an estimate of the cost to honor the related rebate programs. The rebate programs that we offer vary across our businesses as we serve numerous markets. The most common incentives relate to amounts paid or credited to customers that are volume-based and rebates to support promotional activities.
	Concentrations of Credit Risk. We sell a wide range of products and services to a diversified base of customers around the world and perform ongoing credit evaluations of our customers’ financial condition. Therefore, we believe there is no material concentration of credit risk. No single customer represented more than 10 percent of total net revenue or accounts receivable in 2014, 2013, or 2012.
	Cost of Goods Sold. Cost of goods sold includes raw materials, direct labor, manufacturing overhead, shipping and receiving costs, freight costs, depreciation of manufacturing equipment and other less significant indirect costs related to the production of our products.
	Selling, General and Administrative (SG&A) Expenses. SG&A expenses include sales and marketing, customer service, finance, legal, human resources, information technology, general management and similar expenses.
	Research and Development Costs.  Research and development costs are expensed as incurred. Research and development costs include salaries, payroll taxes, employee benefit costs, supplies, depreciation and maintenance of research equipment.
	Rebates Received.  We receive rebates from some of our inventory vendors if we achieve pre-determined purchasing thresholds. These rebates are accounted for as a reduction of the price of the vendor's products and are included as a reduction of our cost of goods sold in the period in which the purchased inventory is sold.
	Income Taxes.  We are required to estimate our income taxes in each of the jurisdictions in which we operate. This process involves estimating our actual current tax obligations based on expected taxable income, statutory tax rates and tax credits allowed in the various jurisdictions in which we operate. Tax laws require certain items to be included in our tax returns at different times than the items are reflected in our results of operations. Some of these differences are permanent, such as expenses that are not deductible in our tax returns, and some are temporary differences that will reverse over time. Temporary differences result in deferred tax assets and liabilities, which are included in our Consolidated Balance Sheets. We must assess the likelihood that our deferred tax assets will be realized and establish a valuation allowance to the extent necessary.
	We record income taxes using the asset and liability approach. Under this approach, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the book and tax basis of assets and liabilities. We measure deferred tax assets and liabilities using the enacted statutory tax rates that are expected to apply in the years in which the temporary differences are expected to be recovered or paid.
	We regularly assess the likelihood that our deferred tax assets will be recovered in the future. In accordance with accounting rules, a valuation allowance is recorded to the extent we conclude a deferred tax asset is not considered to be more-likely-than-not to be realized. We consider all positive and negative evidence related to the realization of the deferred tax assets in assessing the need for a valuation allowance. If we determine it is more-likely-than-not that we will not realize all or part of our deferred tax assets, an adjustment to the deferred tax asset will be charged to earnings in the period such determination is made.
	Our income tax returns are subject to review by various U.S. and foreign taxing authorities. As such, we record accruals for items that we believe may be challenged by these taxing authorities. The threshold for recognizing the benefit of a tax return position in the financial statements is that the position must be more-likely-than-not to be sustained by the taxing authorities based solely on the technical merits of the position. If the recognition threshold is met, the tax benefit is measured and recognized as the largest amount of tax benefit that, in our judgment, is greater than 50 percent likely to be realized. Interest and penalties recorded for uncertain tax positions are included in our income tax provision.
	Treasury Stock.  Our repurchases of shares of common stock are recorded at cost as treasury stock and are presented as a reduction of shareholders’ equity. When treasury shares are reissued, we use a last-in, first-out method, and the difference between repurchase cost and fair value at reissuance is treated as an adjustment to equity.
	Stock-Based Compensation.  Stock-based compensation awards classified as equity awards are measured at fair value at the date of grant and expensed over their vesting or service periods. We also have stock appreciation rights outstanding which are considered liability awards as the settlement of these awards, if they were to vest, would be in cash. If these awards were determined to be probable of achieving its market and performance conditions, we would record the estimated fair value of such awards as a liability and remeasure their estimated value each reporting period.
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The assumptions used in the valuation model are supported primarily by historical indicators and current market conditions. Expected volatilities are based on historical volatility of our stock and are calculated using the historical weekly close rate for a period of time equal to the expected term. The risk-free rate for the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. We use historical data to estimate option exercise and employee termination activity within the valuation model. The expected term of stock options granted is based on historical data and represents the period of time that stock options granted are expected to be outstanding. It is calculated on an aggregated basis and estimated based on an analysis of options already exercised and any foreseeable trends or changes in recipients’ behavior. In determining the expected term, we consider the vesting period of the awards, the contractual term of the awards, historical average holding periods, stock price history, impacts from recent restructuring initiatives and the relative weight for each of these factors. The dividend yield, if applicable, is based on the latest dividend payments made on or announced by the date of the grant. Forfeitures are estimated based on historical experience and current demographics. See Note 8 - Stock-Based Compensation for further information regarding stock-based compensation.
	Weighted Average Basic and Diluted Shares Outstanding. Basic (loss) earnings per common share is calculated using the weighted average number of shares outstanding during the year. Diluted (loss) earnings per common share is computed on the basis of the weighted average basic shares outstanding plus the dilutive effect of our stock-based compensation plans using the “treasury stock” method. Unvested restricted stock and treasury shares are excluded from the calculation of weighted average number of common shares outstanding. Once restricted stock vests, it is included in our common shares outstanding.
	Potential common shares are excluded from the computation of diluted (loss) earnings per common share when the effect would be anti-dilutive. All potential common shares are anti-dilutive in periods of net loss available to common shareholders. Stock options are also anti-dilutive when the exercise price of these instruments is greater than the average market price of the Company's common stock for the period. See Note 3 - (Loss) Earnings per Common Share for our calculation of weighted average basic and diluted shares outstanding.
	Recent Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (FASB) issued new accounting guidance for reporting discontinued operations and disposals of components of an entity. The new guidance requires that a disposal representing a strategic shift, that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale, should be reported as discontinued operations. The new guidance also expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amendments are effective for interim and annual periods beginning on or after December 15, 2014. Early adoption is permitted but only for disposals that have not been reported in financial statements previously issued. This standard will not impact our historical financial position and results of operations, but we will apply this guidance to future dispositions, if any, that qualify for discontinued operations.
	In May 2014, the FASB issued new accounting guidance related to revenue recognition. This new guidance will replace all current U.S. GAAP guidance on revenue recognition and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The guidance is effective for interim and annual periods beginning on or after December 15, 2016 (early adoption is not permitted). The guidance permits the use of either a retrospective or cumulative effect transition method. We have not yet selected a transition method and are currently evaluating the impact of this new guidance on our financial position and results of operations.

Loss_Earnings_per_Common_Share

(Loss) Earnings per Common Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
(Loss) Earnings per Common Share	(Loss) Earnings per Common Share
	The following table sets forth the computation of the weighted average basic and diluted loss per share:
		Years Ended December 31,
		2014			2013			2012
		(In millions, except per share amounts)
	Numerator:
	Loss from continuing operations	$	(112.4	)	$	(24.4	)	$	(324.8	)
	Loss from discontinued operations	(2.3		)	(20.0		)	(15.9		)
	Net loss	$	(114.7	)	$	(44.4	)	$	(340.7	)
	Denominator:
	Weighted average number of common shares outstanding during the period	41			40.5			37.5
	Dilutive effect of stock-based compensation plans	—			—			—
	Weighted average number of diluted shares outstanding during the period	41			40.5			37.5
	Basic loss per common share:
	Continuing operations	$	(2.74	)	$	(0.60	)	$	(8.67	)
	Discontinued operations	(0.06		)	(0.49		)	(0.42		)
	Net loss	(2.80		)	(1.10		)	(9.09		)
	Diluted loss per common share:
	Continuing operations	$	(2.74	)	$	(0.60	)	$	(8.67	)
	Discontinued operations	(0.06		)	(0.49		)	(0.42		)
	Net loss	(2.80		)	(1.10		)	(9.09		)
	Anti-dilutive shares excluded from calculation	4.5			6.1			6.3

Acquisitions_and_Divestitures

Acquisitions and Divestitures	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures
	Acquisitions
	Nexsan Corporation
	On December 31, 2012, we acquired Nexsan Corporation (Nexsan) which is a provider of disk-based storage systems and has a portfolio of disk-based and hybrid disk-and-solid-state storage systems with existing customers worldwide. This acquisition was made for the intention to significantly accelerate our growth in the small and medium-sized business and distributed enterprise storage markets. The purchase price consisted of a cash payment of $104.6 million (subject to adjustment based primarily on working capital received) and 3,319,324 shares of our common stock which was the equivalent of $15.5 million based on the fair value of our stock on the date of acquisition. Nexsan is a part of our TSS reporting segment.
	The preliminary purchase price allocation during the fourth quarter of 2012 resulted in goodwill of $65.5 million, primarily attributable to strategic synergies and intangible assets that did not qualify for separate recognition and are not deductible for tax purposes. During 2013, we recorded an adjustment to the purchase price related to working capital in the amount of $1.6 million. This adjustment resulted in a decrease to goodwill and a cash receipt for this amount. Goodwill associated with the acquisition of Nexsan is included in our Storage Solutions reporting unit, which consists exclusively of the Nexsan business, for the purposes of goodwill impairment testing. See Note 6 - Intangible Assets and Goodwill for more information regarding goodwill. The purchase accounting for this acquisition was final as of December 31, 2013. The purchase price remained preliminary prior to December 31, 2013 pending final evaluation of income tax balances of which there were no further adjustments upon finalization of these balances. The following table illustrates our allocation of the purchase price to the assets acquired and liabilities assumed as of December 31, 2013:
		Amount
		(In millions)
	Cash	$	0.8
	Accounts receivable	14.6
	Inventory	6.9
	Prepaid and other	9
	Property, plant and equipment	5.2
	Intangible assets	42.6
	Goodwill	63.9
	Other assets	0.6
	Accounts payable	(5.3		)
	Accrued expenses	(10.0		)
	Deferred revenue - current	(4.3		)
	Deferred revenue - non-current	(2.5		)
	Other long-term liabilities	(3.0		)
		$	118.5
	Our allocation of the purchase price to the assets acquired and liabilities assumed resulted in the recognition of the following intangible assets:
					Weighted
					Average
		Amount			Life
		(In millions)
	Trade names	$	3.1		5 years
	Other - developed technology	19.4			3-7 years
	Other - research and development technology	1.7			NA
	Customer relationships	18.4			12 years
		$	42.6
	Nexsan did not contribute to the revenue or earnings of Imation for the year ended December 31, 2012, as it was acquired on December 31, 2012. The following unaudited supplemental pro forma information is provided for illustrative purposes only, giving effect to the combination as if the acquisition of Nexsan had occurred on January 1, 2012 and should not be relied upon as being indicative of the historical results that would have been obtained if the acquisition had actually occurred on that date, nor of the results that may be obtained in the future.
		Pro Forma Year End
		31-Dec
		(Unaudited)
		2012
		(In millions)
	Net revenue	$	1,088.70
	Loss from continuing operations	$	(328.5	)
	The unaudited pro forma amounts have been calculated as if the acquisition had occurred on January 1, 2012 and include the following adjustments: (i) additional amortization expense of $5.1 million that would have been recorded for the intangible assets recognized as part of the acquisition, (ii) adjustment of $0.6 million associated with the deferred revenue recorded as part of the purchase accounting for the acquisition, (iii) the elimination of transaction related variable compensation expense of $15.4 million recognized as a result of the acquisition, (iv) the elimination of interest expense of $0.9 million related to Nexsan debt obligations that were repaid upon closing of the acquisition and (v) the elimination of transaction costs incurred of $4.3 million directly associated with the acquisition of Nexsan. Pro forma loss from continuing operations has also been calculated to reflect estimated adjustments to Imation’s income tax provision as if the acquisition had occurred on January 1, 2012. There were no material pro forma adjustments necessary as a result of conforming Nexsan’s accounting policies to those utilized by Imation.
	Discontinued Operations
	On February 13, 2013, we announced our plans to divest our XtremeMac and Memorex consumer electronics businesses. The consumer storage business under the Memorex and TDK Life on Record brands and the consumer electronics business under the TDK Life on Record brand are being retained. These divestitures are part of the acceleration of our strategic transformation that we announced during the fourth quarter of 2012 in conjunction with our plan to increase focus on data storage and data security and were included in our CSA reporting segment. As a part of exiting these disposal groups, we sold the assets directly associated with these businesses, which primarily included inventory, tooling and intangible assets.
	On October 15, 2013 we completed the sale of the Memorex consumer electronics business for $9.3 million of total consideration consisting of two separate receivables from the purchaser. The first was a $3.8 million note receivable that required a $0.9 million payment in December 2013 with the remainder to be paid by March 31, 2014. We received the required $0.9 million cash payment during the fourth quarter of 2013, leaving a $2.9 million note receivable balance as of December 31, 2013 which was recorded in other current assets on our Consolidated Balance Sheets. During 2014, the remaining $2.9 million note receivable balance was restructured into four installments with final payment due in 2015. Imation received $1.6 million of the note balance during 2014 and the remaining $1.3 million is recorded in other current assets on our December 31, 2014 Consolidated Balance Sheets. The second receivable was for $5.5 million and does not bear interest. This receivable requires payments between 2014 and 2018 in increasing annual increments (ranging from $0.2 million in 2014 to $2.2 million in 2018) and during 2014, we received the required payment on this note which was due within the year. We recorded this receivable at its estimated fair value which was calculated to be $4.5 million and $4.0 million as of December 31, 2014 and 2013, respectively. The sale of this business resulted in a net gain of $0.9 million which was recorded as an element of discontinued operations during the year ended December 31, 2013. Our arrangement for the sale of this business also provides Imation with the ability to receive additional consideration through 2018 to the extent the purchaser’s sales exceed certain thresholds. We will record this additional consideration, if any, only upon these sales levels being achieved by the purchaser in the future.
	We use the income approach in calculating the fair value of the non-interest bearing receivable referenced above that was associated with this acquisition. Our expected cash flows are affected by various significant assumptions, including the discount rate and cash flow projections. Our valuation as of December 31, 2014 and 2013 utilized a discount rate of 9.0 percent.
	On January 31, 2014 we completed the sale of the XtremeMac business. The sales price consisted of $0.3 million of cash consideration received at closing and an interest-bearing note receivable of $0.3 million due on December 15, 2015. The sales price also included additional future cash consideration originally estimated at $3.0 million and which was based on the proceeds the purchaser was able to achieve from selling the acquired inventory. During 2013, we adjusted downward our estimate of the expected consideration to be received by $1.2 million. Accordingly, we adjusted the carrying value of the XtremeMac disposal group, and recorded a charge of $1.2 million in 2013 which brought our total full-year 2013 impairment charge associated with this disposal group to $6.7 million. We recorded a charge of $1.2 million in 2014 which is included in the loss on sale of discontinued businesses. The impairment charges are recorded as an element of discontinued operations.
	The operating results for these businesses are presented in our Consolidated Statements of Operations as discontinued operations for all periods presented and reflect revenues and expenses that are directly attributable to these businesses that were eliminated from our ongoing operations. See Note 7 - Restructuring and Other for disclosure of severance expense that was recorded relating to these planned divestitures.
	The key components of the results of discontinued operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net revenue	$	0.4		$	40.7		$	92.9
	(Loss) gain on sale of discontinued businesses, net of income taxes	$	(1.7	)	$	0.9		$	—
	Loss from operations of discontinued businesses, before income taxes	(0.6		)	(14.2		)	(17.7		)
	Adjustment to carrying value of disposal group	—			(6.7		)	—
	Income tax benefit	—			—			(1.8		)
	Loss from discontinued businesses, net of income taxes	$	(2.3	)	$	(20.0	)	$	(15.9	)

Supplemental_Balance_Sheet_Inf

Supplemental Balance Sheet Information	12 Months Ended
	Dec. 31, 2014
Supplemental Balance Sheet Information [Abstract]
Supplemental Balance Sheet Information	Supplemental Balance Sheet Information
	Additional supplemental balance sheet information is provided in the tables that follow.
		As of December 31,
		2014			2013
		(In millions)
	Inventories
	Finished goods	$	51.1		$	76.3
	Work in process	0.7			2.9
	Raw materials and supplies	5.9			5.1
	Total inventories	$	57.7		$	84.3
	Property, Plant and Equipment
	Land	$	1.2		$	1.2
	Buildings and leasehold improvements	94.7			95.4
	Machinery and equipment	88			104
	Construction in progress	0.1			1.1
	Total	184			201.7
	Less accumulated depreciation	(139.0		)	(150.1		)
	Property, plant and equipment, net	$	45		$	51.6
		Accounts Receivable*
		(In millions)
	Reserves and Allowances
	Balance, as of December 31, 2011	$	18.4
	Additions	10.3
	Write-offs, net of recoveries	(10.7		)
	Balance, as of December 31, 2012	$	18
	Additions	6.6
	Write-offs, net of recoveries	(10.1		)
	Balance, as of December 31, 2013	$	14.5
	Additions	2.9
	Write-offs, net of recoveries	(8.3		)
	Balance, as of December 31, 2014	$	9.1
	*Accounts receivable reserves and allowances include estimated amounts for customer returns, discounts on payment terms and the inability of certain customers to make the required payment.
	Other current liabilities (included as a separate line item in our Consolidated Balance Sheet) includes rebates payable of $26.9 million and $33.2 million and accrued payroll of $18.4 million and $19.5 million at December 31, 2014 and 2013, respectively.

Intangible_Assets_and_Goodwill

Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill
	Intangible Assets
	Intangible assets consist of the following:
		Trade Names			Software			Customer Relationships			Other			Total
		(In millions)
	December 31, 2014
	Cost	$	34.2		$	60.1		$	20		$	26.2		$	140.5
	Accumulated amortization	(14.0		)	(55.3		)	(3.7		)	(9.6		)	(82.6		)
	Intangible assets, net	$	20.2		$	4.8		$	16.3		$	16.6		$	57.9
	December 31, 2013
	Cost	$	34.3		$	58.5		$	20.4		$	26.3		$	139.5
	Accumulated amortization	(9.2		)	(53.3		)	(2.1		)	(6.3		)	(70.9		)
	Intangible assets, net	$	25.1		$	5.2		$	18.3		$	20		$	68.6
	For purposes of long-lived asset impairment assessments, we have generally determined our asset groups to be at the level of each brand as this is the lowest level for which identifiable cash flows are available and are largely independent of the cash flows of other assets. Each reporting period, we review our long-lived assets and associated asset groups to determine if there is a triggering event which would require that we perform an impairment test.
	2014 Intangible Asset Analysis
	As a part of our annual goodwill impairment test for our Storage Solutions and Mobile Security reporting units, we also tested for the impairment of long-lived assets, including intangible assets with the asset groups included in our Mobile Security and Storage Solutions reporting units. In performing these tests, we compared the carrying values of these asset groups with their estimated undiscounted future cash flows and determined that the undiscounted cash flows expected to be generated by the asset groups significantly exceeded their carrying values resulting in no impairment. During the first and third quarters of 2014, as noted below under our 2014 goodwill analysis discussion, we performed interim goodwill impairment testing for our Storage Solutions business due to lower than anticipated results. We determined these factors to be an event that warranted interim tests as to whether our intangible assets associated with the Storage Solutions business were impaired. Based on our impairment analysis performed in the first and third quarters of 2014, we concluded that we did not have an impairment of our intangible assets in the Storage Solutions asset group at those times.
	2013 Intangible Asset Analysis
	As a part of our annual goodwill impairment test for our Storage Solutions and Mobile Security reporting units (as further discussed below), we also tested for impairment the long-lived assets, including intangible assets, within the asset groups included in our Mobile Security and Storage Solutions reporting units. In performing these tests, we compared the carrying values of these asset groups with their estimated undiscounted future cash flows and determined that the undiscounted cash flows expected to be generated by the asset groups exceeded their carrying values resulting in no impairment. There were no interim triggering events that occurred during 2013 that warranted an impairment test to be performed on our long-lived assets (including intangible assets) other than goodwill.
	As of December 31, 2014, we had $56.3 million of definite-lived intangible assets subject to amortization and $1.7 million of indefinite-lived intangible assets not subject to amortization. While we believe that the current carrying value of these assets is recoverable, different assumptions regarding future performance of our businesses could result in significant impairment losses.
	Amortization expense from continuing operations for intangible assets consisted of the following:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Amortization expense	$	12.9		$	13.2		$	23.9
	Based on the intangible assets in service as of December 31, 2014, estimated amortization expense for each of the next five years ending December 31 is as follows:
		2015			2016			2017			2018			2019
		(In millions)
	Amortization expense	$	12.1		$	9.9		$	8.7		$	6.6		$	6.2
	Goodwill
	The following table presents the changes in goodwill allocated to our reportable segments:
		TSS			CSA			Total
		(In millions)
	Balance as of December 31, 2012:
	Goodwill	$	201.3		$	49.4		$	250.7
	Accumulated impairment losses	(127.8		)	(49.4		)	(177.2		)
		73.5			—			73.5
	Nexsan purchase price adjustment	(1.6		)	—			(1.6		)
	Foreign currency translation	0.2			—			0.2
	Balance as of December 31, 2013:
	Goodwill	199.9			49.4			249.3
	Accumulated impairment losses	(127.8		)	(49.4		)	(177.2		)
		72.1			—			72.1
	Goodwill impairment	(35.4		)	—			(35.4		)
	Foreign currency translation	(0.6		)	—			(0.6		)
	Balance as of December 31, 2014:
	Goodwill	199.3			49.4			248.7
	Accumulated impairment losses	(163.2		)	(49.4		)	(212.6		)
		$	36.1		$	—		$	36.1
	See Note 4 - Acquisitions for information on goodwill acquired in the Nexsan acquisition during 2012.
	We test the carrying amount of a reporting unit's goodwill for impairment on an annual basis during the fourth quarter of each year or if an event occurs or circumstances change that would warrant impairment testing during an interim period. Our reporting units for goodwill are the Mobile Security reporting unit and the Storage Solutions reporting unit, both of which are within our TSS reportable segment. We do not have any goodwill associated with our CSA segment.
	2014 Goodwill Analysis
	During the first and then again in the third quarter of 2014, we adjusted our internal forecast for our Storage Solutions reporting unit due to lower than anticipated results. We considered these factors to be an event that warranted an interim test as to whether goodwill was impaired in each of these periods. The first quarter test resulted in no impairment of goodwill as the estimated fair value of the reporting unit exceeded its carrying value. In performing Step 1 of the third quarter test, it was determined that the carrying value of our Storage Solutions reporting unit exceeded its estimated fair value. Accordingly, we performed a Step 2 goodwill impairment test which compared the implied value of the goodwill associated with Storage Solutions to the carrying value of such goodwill. Based on this analysis, the carrying value of the Storage Solutions goodwill exceeded its implied value by $35.4 million and, consequently, we recorded an impairment charge of that amount in the Consolidated Statements of Operations. After the impairment charge, the remaining balance of goodwill associated with our Storage Solutions Reporting Unit was $28.1 million as of December 31, 2014.
	In determining the estimated fair value of the reporting unit, we used the income approach, a valuation technique under which we estimate future cash flows using the reporting unit's financial forecasts. Our expected cash flows are affected by various significant assumptions, including the discount rate, revenue, gross margin and EBITA (Earnings Before Interest Taxes and Amortization) expectations and the terminal value growth rate. Our analysis utilized discounted forecasted cash flows over a 10 year period with an estimation of residual growth rates thereafter. We use our business plans and projections as the basis for expected future cash flows. The assumptions included utilized a discount rate of 16.5 percent and a terminal growth rate of 3.0 percent. Because our Storage Solutions business has not yet been able to achieve its anticipated results, we increased our discount rate by 2.0 percent over the estimated market discount rate of 14.5 percent.
	During the fourth quarter of 2014, we performed our annual impairment testing of goodwill for our Mobile Security and Storage Solutions reporting units. In performing Step 1 of these tests, we compared the estimated fair value of these reporting units to the carrying value. These impairment tests resulted in no fourth quarter impairment as the estimated fair value of each reporting unit exceeded the carrying value in Step 1 by 8.2 percent and 107.4 percent for the Storage Solutions and Mobile Security reporting units, respectively.
	In determining the estimated fair value of the reporting units for our annual test performed in the fourth quarter of 2014, we used the income approach, a valuation technique under which we estimate future cash flows using the reporting unit's financial forecasts. Our expected cash flows are affected by various significant assumptions, including the discount rate, revenue, gross margin and EBITA (Earnings Before Interest Taxes and Amortization) expectations and the terminal value growth rate. Our analysis utilized discounted forecasted cash flows over a 10 year period with an estimation of residual growth rates thereafter. We use our business plans and projections as the basis for expected future cash flows. The assumptions included utilized a discount rate of 16.5 percent and a terminal growth rate of 3.0 percent for each reporting unit.
	2013 Goodwill Analysis
	During the fourth quarter of 2013, we performed our annual impairment testing of goodwill for our Mobile Security and Storage Solutions reporting units. In performing Step 1 of these tests, we compared the estimated fair value of these reporting units to their carrying value. These impairment tests resulted in no impairment of goodwill as the estimated fair value of each reporting unit exceeded the carrying value in Step 1 of the impairment tests by 25.7 percent and 34.2 percent, for the Storage Solutions and Mobile Security reporting units, respectively. There were no triggering events that occurred during 2013 that warranted an interim goodwill impairment test to be performed.
	In determining the estimated fair value of the reporting units, we used the income approach, a valuation technique under which we estimate future cash flows using the reporting unit's financial forecasts and the market approach, a valuation technique that provides an estimate of the value of the reporting unit based on a comparison to other similar businesses. Our expected cash flows are affected by various significant assumptions, including projected revenue, gross margin and expense expectations, terminal growth rate and a discount rate. Our analyses utilized discounted forecasted cash flows of a ten year period with an estimation of residual growth rates thereafter. We use our business plans and projections as the basis for these cash flow assumptions. The analysis utilized discount rates of 13.5 percent and 15.5 percent depending on the reporting unit and a terminal growth rate of 3.0 percent.

Restructuring_and_Other_Expens

Restructuring and Other Expense	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring and Other Expense	Restructuring and Other Expense
	Restructuring expenses generally include severance and related charges, lease termination costs and other costs related to restructuring programs. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. Generally, these charges are reflected in the period in which the Board approves the associated actions, the actions are probable and the amounts are estimable which may occur prior to the communication to the affected employee(s). This estimate takes into account all information available as of the date the financial statements are issued. Severance amounts, for which affected employees were required to render service in order to receive benefits at their termination dates, are measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees’ remaining service periods.
	2012 Global Process Improvement Restructuring Program
	On October 2012, the Board of Directors approved our GPI Program in order to realign our business structure and significantly reduce operating expenses over time. This restructuring program addressed product line rationalization and infrastructure and included a planned reduction in our global workforce. The majority of these actions were implemented during 2013. The program has taken out over $100 million in legacy costs, while continuing to invest in our priority growth investments. We have reduced corporate overhead and executive staff, and to generate additional savings, Imation has a number of ongoing cost reduction and cash flow initiatives, including listing our corporate headquarters facility for sale.
	Programs prior to the 2012 Global Process Improvement Restructuring Program are substantially complete.
	The components of our restructuring and other expense included in our Consolidated Statements of Operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Restructuring
	Severance and related	$	3.9		$	2.1		$	16.9
	Lease termination costs	0.3			0.7			0.6
	Other	1.2			2.4			2.2
	Total restructuring	$	5.4		$	5.2		$	19.7
	Other
	Settlement of UK pension plan (Note 9)	0.5			10.6			—
	Gain on sale of fixed assets held for sale	—			(9.8		)	(0.7		)
	Acquisition and integration related costs	—			2.8			3.7
	Pension settlement/curtailment (Note 9)	0.2			2.1			2.4
	Contingent consideration fair value adjustment (Note 4)	—			(0.6		)	(8.6		)
	Intangible asset abandonment (Note 6)	—			—			1.9
	Asset disposals / write down	1.8			—			—
	Other	5.7			1			2.7
	Total	$	13.6		$	11.3		$	21.1
	Total restructuring charges of $5.4 million recorded for the year ended December 31, 2014 and $5.2 million for the year ended December 31, 2013 were all related to the GPI Program.
	For the year ended December 31, 2012, we recorded total restructuring charges of $19.7 million, which included $14.9 million, primarily related to severance, under the GPI Program and $4.2 million under the 2011 Corporate Program primarily, related to severance and $0.6 million of other restructuring charges under the 2011 Manufacturing Program.
	In addition to the restructuring charges recorded in restructuring and other, we recorded inventory write-offs of $4.6 million, $2.7 million and $2.3 million related to the rationalization of certain product lines, for the years ended December 31, 2014, 2013 and 2012, respectively, which are included in cost of goods sold in our Consolidated Statements of Operations.
	Since the inception of the GPI Program, we have recorded a total of $21.5 million of severance and related expenses, $9.6 million of inventory write-offs, $1.1 million of lease termination and modification costs, and $4.5 million of other charges.
	Activity related to the 2012 GPI Program accruals was as follows:
		Severance and Related			Lease Termination Costs			Other			Total
		(In millions)
	Accrued balance at December 31, 2012	$	13.8		$	0.1		$	0.8		$	14.7
	Transfer from 2011 Corporate Program	1.6			0.4			0.2			2.2
	Charges	3.7			0.7			2.4			6.8
	Usage	(16.9		)	(0.7		)	(2.5		)	(20.1		)
	Currency impacts	—			(0.1		)	(0.1		)	(0.2		)
	Accrued balance at December 31, 2013	$	2.2		$	0.4		$	0.8		$	3.4
	Charges	3.7			0.1			0.6			4.4
	Usage	(5.1		)	(0.2		)	(1.4		)	(6.7		)
	Currency impacts	—			—			0.2			0.2
	Accrued balance at December 31, 2014	$	0.8		$	0.3		$	0.2		$	1.3
	Severance and related charges of $0.2 million, lease termination costs of $0.2 million, and other charges of $0.6 million that were recorded in the 2014 were recorded to other accruals and not to the 2012 GPI Program accrual. These charges are not included in the table above.
	December 31, 2013 severance expense of $1.6 million related to employees directly associated with the XtremeMac and Memorex consumer electronics businesses was recorded in discontinued operations. See Note 4 - Acquisitions and Divestitures for more information on our discontinued operations.
	Other
	Certain amounts recorded in Other are discussed elsewhere in our Notes to Consolidated Financial Statements. See note references in table above.
	During the year ended December 31, 2014 we had $1.0 million of asset disposals and write downs related to our Weatherford, Oklahoma facility and miscellaneous disposals of assets of $0.8 million. The $5.7 million of other expenses includes certain employee costs and consulting fees.
	During the year ended December 31, 2013 a gain of $9.8 million related to the sale of our Camarillo, California manufacturing facility was recorded.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	Stock compensation consisted of the following:
		Years Ended December 31,
		2014			2013				2012
		(In millions)
	Stock compensation expense	$	5.3		$	6.3			$	6.6
	We have stock-based compensation awards outstanding under four plans (collectively, the Stock Plans). We have stock options outstanding under our 2000 Stock Incentive Plan (2000 Incentive Plan) and 2005 Stock Incentive Plan (2005 Incentive Plan), and we have stock options and restricted stock outstanding under our 2008 Stock Incentive Plan (2008 Incentive Plan). We have stock options, restricted stock and stock appreciations rights (SARs) outstanding under our 2011 Stock Incentive Plan (2011 Incentive Plan). Restricted stock granted and stock option awards exercised are issued from our treasury stock. The purchase of treasury stock is discretionary and will be subject to determination by our Board of Directors each quarter following its review of our financial performance and other factors.
	No further shares are available for grant under the Directors Plan, the 2000 Incentive Plan, the 2005 Incentive Plan or the 2008 Incentive Plan. Stock-based compensation awards issued under these plans generally have terms of ten years and, for employees, vest over a four-year period. Awards issued to directors under these plans become fully exercisable on the first anniversary of the grant date. Stock options granted under these plans are not incentive stock options. Exercise prices of awards issued under these plans are equal to the fair value of the Company's stock on the date of grant. As of December 31, 2014, there were 2,591,649 stock-based compensation awards outstanding that were issued under these plans and consist of stock options and restricted stock.
	The 2011 Incentive Plan was approved and adopted by our shareholders on May 4, 2011 and became effective immediately. The 2011 Incentive Plan was amended and approved by our shareholders on May 8, 2013. The 2011 Incentive Plan permits the grant of stock options, SARs, restricted stock, restricted stock units, dividend equivalents, performance awards, stock awards and other stock-based awards. The aggregate number of shares of our common stock that may be issued under all stock-based awards made under the 2011 Incentive Plan is 6.0 million. The number of shares available for awards, as well as the terms of outstanding awards, is subject to adjustments as provided in the 2011 Incentive Plan for stock splits, stock dividends, recapitalization and other similar events. Awards may be granted under the 2011 Incentive Plan until the earlier to occur of May 3, 2021 or the date on which all shares available for awards under the 2011 Incentive Plan have been granted; provided, however, that incentive stock options may not be granted after February 10, 2021.
	Stock-based compensation awards issued under the 2011 Incentive Plan generally have a term of ten years and, for employees, vest over a three-year period. Awards issued to directors under this plan become fully exercisable on the first anniversary of the grant date. Stock options granted under these plans are not incentive stock options. Exercise prices of awards issued under these plans are equal to the fair value of the Company's stock on the date of grant.
	As of December 31, 2014 we had 2,655,254 of stock-based compensation awards consisting of stock options and restricted stock outstanding under the 2011 Incentive Plan. As of December 31, 2014 there were 1,929,545 shares available for grant under our 2011 Incentive Plan.
	Stock Options
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model. The assumptions used in the valuation model are supported primarily by historical indicators and current market conditions. Volatility was calculated using the historical weekly close rate for a period of time equal to the expected term. The risk-free rate of return was determined by using the U.S. Treasury yield curve in effect at the time of grant. The expected term was calculated on an aggregated basis and estimated based on an analysis of options already exercised and any foreseeable trends or changes in recipients’ behavior. In determining the expected term, we considered the vesting period of the awards, the contractual term of the awards, historical average holding periods, stock price history, impacts from recent restructuring initiatives and the relative weight for each of these factors. The dividend yield was based on the latest dividend payments made on or announced by the date of the grant.
	The following table summarizes our weighted average assumptions used in the valuation of options for the years ended December 31:
		2014		2013			2012
	Volatility	46	%	43	%		45	%
	Risk-free interest rate	1.93	%	1.05	%		1.07	%
	Expected life (months)	73		72			71
	Dividend yield	—	%	—	%		—	%
	The following table summarizes our stock option activity:
		Stock Options		Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
										(millions)
	Outstanding December 31, 2011	5,679,579		$	19.87			6		$	—
	Granted	1,178,780		5.8
	Exercised	—		—
	Canceled	(752,415	)	26.61
	Forfeited	(287,472	)	9.24
	Outstanding December 31, 2012	5,818,472		$	16.57			5.9		$	—
	Granted	1,034,406		3.85
	Exercised	—		—
	Canceled	(1,069,192	)	25.22
	Forfeited	(412,148	)	7.13
	Outstanding December 31, 2013	5,371,538		$	13.11			6.1		$	0.8
	Granted	61,275		3.72
	Exercised	(87,569	)	3.97
	Canceled	(881,069	)	19.05
	Forfeited	(566,189	)	4.14
	Outstanding December 31, 2014	3,897,986		$	13.07			4.8		$	—
	Of the options granted during the year ended December 31, 2014 and 2013, 61,275 and 113,125, respectively, were performance-based options that vest based on the Company's performance against Earnings Before Interest Taxes Depreciation and Amortization (EBITDA) targets for the subsequent three year period. Our 2014 performance was met and, accordingly, some of the options for 2014 vested. Our 2013 performance was partially met and, accordingly, some of the options for 2013 vested. No performance-based options were granted for the year ended December 31, 2012.
	The aggregate intrinsic value of all outstanding stock options was less than $0.1 million, $0.8 million and less than $0.1 million as of December 31, 2014, 2013 and 2012, respectively. The intrinsic value of options exercised during 2014 was less than $0.1 million. The weighted average grant date fair value of options granted during the years 2014, 2013 and 2012 was $1.72, $1.61 and $2.53, respectively.
	The following table summarizes exercisable options and options expected to vest as of December 31, 2014:
		Exercisable Options								Options Expected to Vest
				Weighted		Weighted						Weighted	Weighted
				Average		Average						Average	Average
				Remaining								Remaining
	Range of Exercise	Stock		Contractual		Exercise				Stock		Contractual	Exercise
	Prices	Options		Life (Years)		Price				Options		Life (Years)	Price
	$3.48 to $6.16	618,973		6.6		$	5.32			481,243		8	$	4.61
	$6.17 to $9.64	475,772		4.4		8.66				4,094		7.1	6.19
	$9.65 to $19.20	1,417,382		4.8		10.06				3,062		6.2	11.31
	$19.21 to $23.95	9,500		3		20.2				—		0	—
	$23.96 to $28.70	403,837		2.4		24.62				—		0	—
	$28.71 to $39.38	323,487		1.1		35.97				—		0	—
	$39.39 to $41.75	118,900		1.2		41.62				—		0	—
	$41.76 to $46.97	2,500		1.4		45.76				—		0	—
	$3.48 to $46.97	3,370,351		4.3		$	14.39			488,399		8	$	4.67
	Total stock-based compensation expense associated with stock options related to continuing operations recognized in our Consolidated Statements of Operations for the years ended December 31, 2014, 2013 and 2012 was $1.4 million, $2.7 million and $3.3 million, respectively. This expense would result in related tax benefits of $0.5 million, $0.9 million and $1.1 million for the years ended December 31, 2014, 2013 and 2012, respectively. However, these tax benefits are included in the U.S. deferred tax assets which are subject to a full valuation allowance, and due to the valuation allowance, we did not recognize the related tax benefits in 2014, 2013 or 2012. As of December 31, 2014 there was $0.5 million of total unrecognized compensation expense related to outstanding stock options. That expense is expected to be recognized over a weighted average period of 1.1 years.
	No related stock-based compensation was capitalized as part of an asset for the years ended December 31, 2014, 2013 or 2012.
	Restricted Stock
	The following table summarizes our restricted stock activity:
		Restricted Stock		Weighted Average Grant Date Fair Value Per Share
	Nonvested as of December 31, 2011	795,046		$	10.02
	Granted	708,573		5.67
	Vested	(321,103	)	10.3
Forfeited	(156,712	)	8.72
Nonvested as of December 31, 2012	1,025,804		$	7.12
Granted	837,443		3.75
Vested	(561,099	)	6.99
Forfeited	(109,827	)	6.59
Nonvested as of December 31, 2013	1,192,321		$	4.87
Granted	1,229,249		3.65
Vested	(734,533	)	5.19
Forfeited	(338,120	)	3.95
Nonvested as of December 31, 2014	1,348,917		$	3.81
Of the restricted stock granted during the year ended December 31, 2014 and 2013, 914,768 and 529,141, respectively, were performance-based restricted stock that vest based on the Company's cost reduction efforts and performance against EBITDA targets for the subsequent three year period. Our 2014 performance was met and, accordingly, some of the restricted stock for 2014 vested and will be issued subsequent to December 31, 2014. Our 2013 performance was partially met and, accordingly, some of the restricted stock for 2013 vested and will be issued subsequent to December 31, 2013. No performance-based restricted shares were granted during the year ended December 31, 2012.
The total fair value of shares that vested during the years 2014, 2013 and 2012 was $3.8 million, $3.9 million and $3.3 million, respectively.
Total stock-based compensation expense associated with restricted stock relating to continuing operations recognized in our Consolidated Statements of Operations for the years ended December 31, 2014, 2013 and 2012 was $3.9 million, $3.6 million and $3.3 million, respectively. This expense would result in related tax benefits of $1.5 million, $1.5 million and $1.4 million for the years ended December 31, 2014, 2013 and 2012, respectively. However, these tax benefits are included in the U.S. deferred tax assets which are subject to a full valuation allowance and due to the valuation allowance, we did not recognize the related tax benefit in 2014, 2013 and 2012. As of December 31, 2014 there was $2.4 million of total unrecognized compensation expense related to outstanding restricted stock. That expense is expected to be recognized over a weighted average period of 1.5 years.
No related stock-based compensation was capitalized as part of an asset for the years ended December 31, 2014, 2013 or 2012.
Stock Appreciation Rights (SARs)
During the years ended December 31, 2014 and 2013, we granted 0.7 million and 3.1 million SARs under the 2011 Incentive Plan to certain employees associated with our Nexsan and Mobile Security operations. These awards were issued to incentivize employees to grow revenues. These awards expire in five years and only vest when both of the market and performance conditions specified by the terms of the SARs are met. For the market conditions, based on the terms of the awards, 50 percent of the SARs may vest if the 30-day average Imation stock price reaches $10 per share or more by December 31, 2016 and the remaining 50 percent of the SARs may vest if the 30-day average Imation stock price reaches $15 per share or more by December 31, 2016. Additionally, for the performance condition, as a condition necessary for vesting, the net revenue of Nexsan or Mobile Security (depending on the award) must reach certain specified stretch targets by December 31, 2016. If exercised, the SARs require a cash payment to the holder in an amount based on the Imation stock price at the date of exercise as compared to the stock priced at the date of grant. As of December 31, 2014 and 2013 we have not recorded any compensation expense associated with these SARs based on the applicable accounting rules. We will continue to assess these SARs each quarter to determine if any expense should be recorded.

Retirement_Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Retirement Plans	Retirement Plans
	Pension Plans
	We have various non-contributory defined benefit pension plans covering United States employees employed prior to January 1, 2010 and certain employees outside the United States, primarily in Germany and Japan. Total pension expense was $0.2 million, $2.6 million and $2.0 million in 2014, 2013 and 2012, respectively. The measurement date of our pension plans is December 31st. During the twelve months ended December 31, 2014 we contributed $2.1 million to our worldwide pension plans. We presently anticipate contributing between $1 million and $2 million to fund our worldwide pension plans in 2015. It is our general practice, at a minimum, to fund amounts sufficient to meet the requirements set forth in applicable benefits laws and local tax laws. From time to time, we contribute additional amounts, as we deem appropriate.
	Effective January 1, 2010, the U.S. plan was amended to exclude new hires and rehires from participating in the plan. In addition, we eliminated benefit accruals under the U.S. plan as of January 1, 2011, thus “freezing” the defined benefit pension plan. Under the plan freeze, no pay credits were made to a participant’s account balance after December 31, 2010. However, interest credits will continue in accordance with the annual update process.
	For the U.S. plan, employees who have completed three years or more of service, including service with 3M Company before July 1, 1996, or who have reached age 65, are entitled to pension benefits beginning at normal retirement age (65) based primarily on employees’ pay credits and interest credits. Through December 31, 2009, pay credits were made to each eligible participant's account equal to six percent of that participant's eligible earnings for the year. Beginning on January 1, 2010 and through December 31, 2010, pay credit contributions were reduced to three percent of each participant’s eligible earnings. In conjunction with the plan freeze, no additional pay credits were made to a participant’s account balance after December 31, 2010. A monthly interest credit is made to each eligible participant’s account based on the participant’s account balance as of the last day of the preceding year. The interest credit rate is established annually and is based on the interest rate of certain low-risk debt instruments. The interest credit rate was 3.80 percent for 2014. In accordance with the annual update process, the interest credit rate will be 3.04 percent for 2015.
	In connection with actions taken under our announced restructuring programs, the number of employees accumulating benefits under our pension plan in the United States continues to decline. Participants in our U.S. plan have the option of receiving cash lump sum payments when exiting the plan, which a number of participants exiting the plan have elected to receive. Lump sum payments in 2014, 2013 and 2012 exceeded the service and interest costs associated with those years. As a result, a partial settlement event occurred in those years and, accordingly, we recognized a settlement loss of $1.1 million, $2.1 million and $2.4 million during 2014, 2013 and 2012, respectively. These settlement losses are included in restructuring and other in our Consolidated Statements of Operations.
	The U.S. pension plan permits four payment options: a lump-sum option, a life income option, a survivor option or a period certain option.
	We maintained a defined benefit pension plan located in the United Kingdom (UK Plan) for former employees with no current employees in the plan. During the third quarter of 2013 we settled our UK Plan by way of a transaction with Pension Insurance Corporation (PIC) whereby PIC fully assumed the projected benefit obligation and underlying plan assets. The net balance assumed by PIC represented an asset balance of $6.4 million and no cash consideration took place between Imation and PIC associated with this transaction for the initial settlement. As a result of this transaction, we removed this net asset and related unrecognized net actuarial loss in other comprehensive loss and recorded a loss of $10.6 million in restructuring and other in our Consolidated Statements of Operations during the year ended December 31, 2013. Additionally, the settlement of the UK Plan resulted in the removal of a deferred tax liability related to the plan resulting in a $2.3 million credit to income tax expense for the year ended December 31, 2013. See Note 10 - Income Taxes for further discussion of the impact on the income tax rate. It is a standard practice in the United Kingdom (UK) for a review process by the UK government, entailing a review of the plan obligations and participant data, to occur upon a transaction such as this one involving a transfer of a pension plan. The regulatory review was finalized in 2014 and as result of the findings, we recorded a true-up of $0.5 million of additional loss in restructuring and other in our Consolidated Statements of Operations for the year ended December 31, 2014.
	The benefit obligations and plan assets, changes to the benefit obligations and plan assets, and the funded status of the defined benefit pension plans were as follows:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Change in benefit obligation
	Benefit obligation, beginning of year	$	78.5			$	88.3			$	31.4		$	63.4
	Service cost	—				—				0.3			0.5
	Interest cost	3.3				3.3				0.9			2
	Actuarial (gain) loss	4.4				(1.7		)		6.5			(4.7		)
	Benefits paid	(1.8		)		(2.0		)		(1.6		)	(3.5		)
	Settlements	(5.6		)		(9.4		)		—			(24.8		)
	Foreign exchange rate changes	—				—				(4.3		)	(1.5		)
	Projected benefit obligation, end of year	$	78.8			$	78.5			$	33.2		$	31.4
	Change in plan assets
	Fair value of plan assets, beginning of year	$	71			$	71.7			$	26.1		$	58
	Actual return on plan assets	2.5				10.7				1.6			(3.3		)
	Foreign exchange rate changes	—				—				(3.2		)	(1.8		)
	Company contributions	1.4				—				0.7			1.5
	Benefits paid	(1.8		)		(2.0		)		(1.6		)	(3.5		)
	Settlement payments	(5.6		)		(9.4		)		—			(24.8		)
	Fair value of plan assets, end of year	67.5				71				23.6			26.1
	Funded status of the plan, end of year	$	(11.3	)		$	(7.5	)		$	(9.6	)	$	(5.3	)
	Amounts recognized in our Consolidated Balance Sheets consisted of the following:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Noncurrent assets	$	—			$	—			$	1.6		$	—
	Noncurrent liabilities	(11.3		)		(7.5		)		(11.2		)	(5.3		)
	Accumulated other comprehensive loss — pre-tax	19				14.3				10.4			4.6
	Pre-tax amounts recognized in accumulated other comprehensive loss consisted of the following:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Net actuarial loss	$	19			$	14.3			$	12.1		$	7.6
	Prior service credit	—				—				(2.2		)	(4.0		)
	Transition asset obligation	—				—				0.5			1
	Total	$	19			$	14.3			$	10.4		$	4.6
	The following table includes information for pension plans with an accumulated benefit obligation in excess of plan assets. The balances presented as of December 31, 2014 and 2013 exclude our Japan plan which had plan assets in excess of accumulated benefit obligation for both years.
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Projected benefit obligation, end of year	$	78.8			$	78.5			$	28.7		$	25.7
	Accumulated benefit obligation, end of year	78.8				78.5				28.7			25.7
	Plan assets at fair value, end of year	67.5				71				17.6			19.7
	Components of net periodic pension cost included the following:
		United States											International
		Years Ended December 31,											Years Ended December 31,
		2014				2013				2012			2014				2013			2012
		(In millions)
	Service cost	$	—			$	—			$	—		$	0.3			$	0.5		$	0.6
	Interest cost	3.3				3.3				3.2			0.9				2			2.2
	Expected return on plan assets	(4.8		)		(5.1		)		(5.7		)	(0.8		)		(2.5		)	(2.3		)
Amortization of net actuarial loss	1.1				1.9				1.5			0.2				0.5			0.3
Amortization of prior service credit	—				—				—			(0.3		)		(0.4		)	(0.5		)
Amortization of transition obligation	—				—				—			0.1				0.3			0.3
Net periodic pension cost (credit)	(0.4		)		0.1				(1.0		)	0.4				0.4			0.6
Settlements and curtailments	1.1				2.1				2.4			(0.9		)		—			—
Total pension cost	$	0.7			$	2.2			$	1.4		$	(0.5	)		$	0.4		$	0.6
Total pension cost for each of our international plans individually ranged from less than $0.1 million to $0.4 million in 2014, $0.1 million to $0.5 million in 2013 and $0.1 million to $0.6 million in 2012. Total pension credit ranged from less than $0.1 million to $0.8 million during 2014, 2013 and 2012.
The estimated net actuarial loss, prior service credit and net obligations at transition for the defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit costs in 2015 are $1.5 million loss, $0.4 million credit and $0.3 million obligation, respectively.
Assumptions used to determine benefit obligations were as follows (international assumptions are a weighted average of all of our international plans):
	United States						International
	As of December 31,						As of December 31,
	2014			2013			2014			2013
Discount rate	4	%		4.5	%		1.89	%		3.2	%
Rate of compensation increase	—	%		—	%		2.92	%		2.89	%
Assumptions used to determine net periodic benefit costs were as follows (international assumptions are a weighted average of all of our international plans):
	United States									International
	As of December 31,									As of December 31,
	2014			2013			2012			2014		2013			2012
Discount rate (1)	4.25	%		4	%		3.75	%		3.27	%	2.7	%		4.09	%
Expected return on plan assets	7.75	%		7.75	%		8	%		3.35	%	4.53	%		4.32	%
Rate of compensation increase	—	%		—	%		—	%		2.86	%	2	%		2.57	%
(1) The discount rate of 4.25 percent used to determine the 2014 net periodic benefit cost for the U.S. plan is an average of the discount rates used during the year of 4.50 percent for the first six months of the year and 4.00 percent for the last six months of the year.
The discount rate for the U.S. plan is determined through a modeling process utilizing a customized portfolio of high-quality bonds whose annual cash flows cover the expected benefit payments of the plan, as well as comparing the results of our modeling to other corporate bond and pension liability indices. Appropriate benchmarks are used to determine the discount rate for the international plans. The expected long-term rate of return on assets assumption is derived from a study that includes a review of anticipated future long-term performance of individual asset classes and consideration of the appropriate asset allocation strategy given the anticipated requirements of the plan to determine the average rate of earnings expected on the funds invested to provide for the pension plan benefits. While the study gives appropriate consideration to recent fund performance and historical returns, the assumption is primarily a long-term, prospective rate. The expected long-term rate of return on assets assumption for the international plans reflects the investment allocation and expected total portfolio returns specific to each plan and country. Beginning in 2011, the projected salary increase assumption was not applicable for the U.S. plan due to the elimination of benefit accruals as of January 1, 2011.
The mortality table for the U.S. plan was updated to use the "RP 2014 Mortality Tables" for December 31, 2014. The impact of converting to the new table increased the projected benefit liability by $2.3 million and will increase 2015 expense by $0.3 million.
The plans' asset allocations by asset category were as follows:
	United States						International
	As of December 31,						As of December 31,
	2014			2013			2014			2013
Short-term investments	1	%		1	%		1	%		1	%
Fixed income securities	23	%		18	%		24	%		23	%
Equity securities	57	%		63	%		—	%		—	%
Absolute return strategy equity funds	19	%		18	%		—	%		—	%
Insurance contracts	—	%		—	%		75	%		76	%
Total	100	%		100	%		100	%		100	%
For the U.S. plan, we maintain target allocation percentages among various asset classes based on an investment policy established for the plan, which is designed to achieve long-term objectives of return, while mitigating against downside risk and considering expected cash flows. The current target asset allocation includes equity securities at 35 to 80 percent, fixed income securities at 20 to 40 percent and other investments at 10 to 20 percent. Other investments include short-term investments and absolute return strategy funds which are investments designed to achieve a certain return. Management reviews our U.S. investment policy for the plan at least annually. Outside the U.S., the investment objectives are similar to the U.S., subject to local regulations. In some countries, a higher percentage allocation to fixed income securities is required.
As of December 31, 2014, the following reflects future benefit payments services expected to be paid, by the plans, in each of the next five years and in the aggregate for the five years thereafter:
	United States		International
	(In millions)
2015	$15.70		$1.10
2016	5		1.2
2017	4.6		1.2
2018	4.6		1.2
2019	4.7		1.2
2020-2024	25.5		7
The assets in our defined benefit pension plans are measured at fair value on a recurring basis (at least annually). A three-level hierarchy is used for fair value measurements based upon the observability of the inputs to the valuation of an asset or liability as of the measurement date.
Following is a description of the valuation methodologies used for assets measured at fair value.
Short-term investments. The carrying value of these assets approximates fair value because maturities are generally less than three months. Accordingly, these investments are classified as Level 1 financial instruments.
Mutual funds. Investments in mutual funds are valued using the net asset value (NAV) of shares held as of December 31st. The NAV is a quoted transactional price for participants in the fund which do not represent an active market. In relation to these investments, there are no unfunded commitments and the shares can be redeemed on a daily basis with minimal restrictions. Events that may lead to a restriction to transact with the funds are not considered probable. These investments are generally classified as Level 1 financial instruments, however for certain mutual funds, the NAV is not published, and accordingly, these investments are classified as Level 2 financial instruments. The investment objective of our mutual funds in the U.S. Plan is to provide capital appreciation through an investment strategy that allocates its assets among limited liability companies and/or separate investment accounts or to invest in large cap equity funds focusing on high quality yields through short maturity investments in spread sectors depending on the fund.
Common stocks. Investments in common stock are valued at the closing price reported on major markets on which the individual securities are traded. Accordingly, these investments are classified as Level 1 financial instruments.
Comingled trust funds. These assets are valued using the NAV of shares as of December 31st. The NAV is a quoted transactional price for participants in the fund which do not represent an active market. In relation to these investments, there are no unfunded commitments and the shares can be redeemed on a daily basis with minimal restrictions. Events that may lead to a restriction to transact with the funds are not considered probable. These investments are classified as Level 2 financial instruments. The Fund’s investment objective is to achieve long-term growth primarily by investing in a diversified portfolio of equity securities of companies located in any country other than the United States.
Insurance contracts. These assets are valued using quoted prices for similar assets. Accordingly, these investments are classified as Level 2 financial instruments.
These methods may produce a fair value calculation that may not be indicative of the net realizable value or reflective of future fair values. Furthermore, while we believe the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different value measurement. Investments, in general, are subject to various risks, including credit, interest and overall market volatility risks. There were no transfers into or out of Level 1 or Level 2 during the years ended December 31, 2014 or December 31, 2013.
The fair value of the plan assets by asset category were as follows:
United States	December 31, 2014				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
					(Level 1)				(Level 2)			(Level 3)
	(In millions)
Short-term investments
Money market securities	$	0.4			$	0.4			$	—		$	—
Mutual Funds
Equity securities
Large-cap growth funds	14.6				—				14.6			—
International growth fund	10.8				7.3				3.5			—
Fixed income securities	15.5				15.5				—			—
Absolute return strategy funds	13.2				—				13.2			—
Common stocks	7.3				7.3				—			—
Commingled trust funds	5.7				—				5.7			—
Total	$	67.5			$	30.5			$	37		$	—
International	December 31, 2014				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
					(Level 1)				(Level 2)			(Level 3)
	(In millions)
Short-term investments
Other	$	0.3			$	—			$	0.3		$	—
Mutual Funds
Fixed income securities	5.7				—				5.7			—
Insurance contracts	17.6				—				17.6			—
Total	$	23.6			$	—			$	23.6		$	—
United States	December 31, 2013				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
					(Level 1)				(Level 2)			(Level 3)
	(In millions)
Short-term investments
Money market securities	$	0.5			$	0.5			$	—		$	—
Mutual Funds
Equity securities
Large-cap growth funds	16.1				—				16.1			—
International growth fund	11.1				7.5				3.6			—
Fixed income securities	13				13				—			—
Absolute return strategy funds	12.8				—				12.8			—
Common stocks	8.3				8.3				—			—
Commingled trust funds	9.2				—				9.2			—
Total	$	71			$	29.3			$	41.7		$	—
International	December 31, 2013				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
					(Level 1)				(Level 2)			(Level 3)
	(In millions)
Short-term investments
Other	$	0.3			$	—			$	0.3		$	—
Mutual Funds
Equity securities - blended funds	—				—				—			—
Fixed income securities	6.1				—				6.1			—
Insurance contracts	19.7				—				19.7			—
Total	$	26.1			$	—			$	26.1		$	—
Employee Retirement Savings Plans
Effective January 1, 2011, our matching formula under our 401(k) retirement plan is 100 percent of employee contributions up to the first five percent of eligible compensation. We used shares of treasury stock to match employee 401(k) contributions for 2014, 2013 and 2012. Starting in January 1, 2015, we will be matching contributions in cash. Total expense related to the use of shares of treasury stock to match employee 401(k) contributions was $1.8 million, $1.7 million and $2.3 million in 2014, 2013 and 2012, respectively.
We also sponsor a variable compensation program in which we may, at our discretion, contribute up to three percent of eligible employee compensation to employees’ 401(k) retirement accounts, depending upon total Company performance. We use shares of treasury stock for this contribution. A contribution of $0.4 million was made under the variable compensation program during the year ended December 31, 2014 for 2013. No contribution was made under the variable compensation program during the year ended December 31, 2013 for 2012. A contribution of $0.7 million was made under the variable compensation program during the year ended December 31, 2012 for 2011.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The components of loss from continuing operations before income taxes were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	U.S.	$	(95.3	)	$	(25.2	)	$	(266.1	)
	International	(14.0		)	2.2			(57.3		)
	Total	$	(109.3	)	$	(23.0	)	$	(323.4	)
	The components of the income tax provision from continuing operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Current
	Federal	$	0.5		$	(0.7	)	$	(11.5	)
	State	(0.5		)	—			—
	International	(0.1		)	5.9			6.3
	Deferred
	Federal	1.7			—			8.8
	State	—			—			—
	International	1.5			(3.8		)	(2.2		)
	Total	$	3.1		$	1.4		$	1.4
	The income tax provision from continuing operations differs from the amount computed by applying the statutory United States income tax rate (35 percent) because of the following items:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Tax at statutory U.S. tax rate	$	(38.3	)	$	(8.1	)	$	(113.2	)
	State income taxes, net of federal benefit	(3.2		)	(0.2		)	(6.3		)
	Net effect of international operations	1.1			3.1			25
	Settlement of UK pension plan	—			(2.3		)	—
	Valuation allowances	22.9			(3.2		)	89.2
	Tax on unremitted earnings of foreign subsidiaries	15.9			—			—
	U.S. tax on foreign earnings	4.7			6.2			3.9
	Stock-based compensation	2.1			3.1			2.4
	Uncertain tax positions	(1.2		)	2.2			0.3
	Goodwill impairment	10.7			—			—
	Capital losses	(11.4		)	—			—
	Other	(0.2		)	0.6			0.1
	Income tax provision	$	3.1		$	1.4		$	1.4
	Our 2014 tax provision of $3.1 million primarily represents tax expense related to operations outside the United States and tax expense recorded for the liability on unremitted foreign earnings of $1.7 million.
	Our 2013 tax provision of $1.4 million primarily represents tax expense related to operations outside the United States and unrecognized tax benefits recorded during the year offset by the tax benefit related to the settlement of our UK pension plan during the year.
	In 2014, 2013 and 2012 the net cash paid for income taxes, relating to both continuing and discontinued operations, was $4.7 million, $4.6 million and $4.4 million, respectively.
	Tax laws require certain items to be included in our tax returns at different times than the items are reflected in our results of operations. Some of these items are temporary differences that will reverse over time. We record the tax effect of temporary differences as deferred tax assets and deferred tax liabilities in our Consolidated Balance Sheets.
	The components of net deferred tax assets and liabilities were as follows:
		As of December 31,
		2014			2013
		(In millions)
	Accounts receivable allowances	$	1.6		$	3
	Inventories	7.6			9.1
	Compensation and employee benefits	6.6			8
	Tax credit carryforwards	33.9			35.8
	Net operating loss carryforwards	149.4			115.2
	Accrued liabilities and other reserves	7			9
	Pension	9			6
	Property, plant and equipment	10.2			8.9
	Intangible assets, net	49.6			55.3
	Capital losses	11.5			—
	Other, net	0.7			1.8
	Total deferred tax assets	287.1			252.1
	Valuation allowance	(262.4		)	(239.4		)
	Net deferred tax assets	24.7			12.7
	Unremitted earnings of foreign subsidiaries	(15.7		)	—
	Property, plant and equipment	—			—
	Total deferred tax liabilities	(15.7		)	—
	Net deferred tax assets	$	9		$	12.7
We regularly assess the likelihood that our deferred tax assets will be recovered in the future. A valuation allowance is recorded to the extent we conclude a deferred tax asset is not considered to be more-likely-than-not to be realized. We consider all positive and negative evidence related to the realization of the deferred tax assets in assessing the need for a valuation allowance.
Our accounting for deferred tax consequences represents our best estimate of future events. A valuation allowance established or revised as a result of our assessment is recorded through income tax provision (benefit) in our Consolidated Statements of Operations. Changes in our current estimates due to unanticipated events, or other factors, could have a material effect on our financial condition and results of operations.
We maintain a valuation allowance related to our U.S. deferred tax assets and certain foreign net operating losses. The valuation allowance was $262.4 million, $239.4 million and $239.1 million as of December 31, 2014, 2013 and 2012, respectively. The valuation allowance change in 2014 compared to 2013 was due primarily to operating losses. The valuation allowance change from 2013 compared to 2012 was not significant.
The accounting rules require the current and non-current components of the deferred tax balances to be netted by jurisdiction prior to disclosure in the balance sheet. The table below shows the components of our deferred tax balances after the results of that netting process as they are recorded on our Consolidated Balance Sheets:
	As of December 31
	2014			2013
	(In millions)
Deferred tax asset - current	3.2			4.6
Deferred tax asset - non-current	8.1			9.5
Deferred tax liability - current	—			(0.4		)
Deferred tax liability - non-current	(2.3		)	(1.0		)
Total	$	9		$	12.7
Federal net operating loss carryforwards totaling $348.5 million will begin expiring in 2026. We have state income tax loss carryforwards of $383.9 million, $2.3 million of which will expire between 2015 and 2017 and the remaining will expire at various dates up to 2034. We have U.S. and foreign tax credit carryforwards of $33.9 million, $7.6 million of which will expire between 2015 and 2017, $23.9 million of which will expire between 2018 and 2032 and $2.4 million may be carried forward indefinitely. Federal capital losses of $30.1 million will expire in 2019. Of the aggregate foreign net operating loss carryforwards totaling $35.3 million, $0.3 million will expire between 2015 and 2017, $2.4 million will expire at various dates up to 2024 and $32.6 million may be carried forward indefinitely.
During the fourth quarter of 2014, the Company changed its assertion around the permanent reinvestment of foreign unremitted earnings due to its reassessment of possible future cash needs associated with the continued execution of its transformation. Accordingly, the permanent reinvestment assertion of foreign unremitted earnings was removed. A deferred tax liability has been recorded for the estimated impact of future repatriation of the unremitted foreign earnings in the amount of $15.7 million. Net operating losses fully offset $14.1 million of this liability, and the remaining $1.6 million liability is related to foreign tax withholding, assuming such repatriation were to occur.
Our income tax returns are subject to review by various U.S. and foreign taxing authorities. As such, we record accruals for items that we believe may be challenged by these taxing authorities. The threshold for recognizing the benefit of a tax return position in the financial statements is that the position must be more-likely-than-not to be sustained by the taxing authorities based solely on the technical merits of the position. If the recognition threshold is met, the tax benefit is measured and recognized as the largest amount of tax benefit that, in our judgment, is greater than 50 percent likely to be realized.
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
	2014			2013			2012
	(In Millions)
Beginning Balance	$	5.3		$	4.4		$	15.1
Additions:
Additions for tax positions of current years	0.3			0.3			0.3
Additions for tax positions of prior years	0.1			1.1			0.6
Reductions:
Reductions for tax positions of prior years	(1.9		)	(0.4		)	(11.3		)
Settlements with taxing authorities	(1.3		)	—			(0.2		)
Reductions due to lapse of statute of limitations	(0.4		)	(0.1		)	(0.1		)
Total	2.1			5.3			4.4
The total amount of unrecognized tax benefits, which excludes accrued interest and penalties described below, as of December 31, 2014 was $2.1 million. The $11.3 million reduction made during 2012 related to prior year tax positions included $10.5 million of tax benefit that was offset by a corresponding increase in valuation allowance against deferred tax assets. If the unrecognized tax benefits remaining at December 31, 2014 were recognized in our consolidated financial statements, $1.7 million would ultimately affect income tax expense and our related effective tax rate.
It is reasonably possible that the amount of the unrecognized tax benefits could increase or decrease significantly during the next twelve months; however, it is not possible to reasonably estimate the effect on the unrecognized tax benefit at this time.
Interest and penalties recorded for uncertain tax positions are included in our income tax provision. During the years ended December 31, 2014, 2013 and 2012, we recognized approximately $0.4 million expense, $0.8 million expense and $1.3 million benefit, respectively, in interest and penalties. We had approximately $0.2 million, $1.1 million and $0.3 million accrued, excluding the tax benefit of deductible interest, for the payment of interest and penalties at December 31, 2014, 2013 and 2012, respectively. The reversal of accrued interest and penalties would affect income tax expense and our related effective tax rate.
Our federal income tax returns for 2011 through 2013 are subject to examination by the Internal Revenue Service (IRS). We currently have foreign tax audits underway in various jurisdictions. Based on available information, the uncertain tax position associated with these foreign audits have been assessed and included in our income tax provision. For state and foreign tax purposes, the statutes of limitation vary by jurisdiction. With few exceptions, we are no longer subject to examination by foreign tax jurisdictions or state and local tax jurisdictions for years before 2008.

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	Debt
	As of December 31, 2014 and 2013, we had short-term borrowings of $18.9 million and $20.0 million, respectively. The borrowings in 2014 were primarily from our credit agreements with various banks in the United States, Europe, and Japan.
	On March 30, 2006, we entered into a credit agreement with a group of banks (the Credit Agreement). Subsequently, we entered into various amendments which, among other things, added Imation Europe B.V. as a borrower (European Borrower).
	On May 18, 2012, we entered into an amendment (the Amendment) to the Credit Agreement (as amended to date, the Amended Credit Agreement). The Amendment modified the Credit Agreement by extending the expiration date of the borrowing arrangement to May 18, 2017, requiring that the equity interests of material foreign subsidiaries be pledged to support the obligations, if any, of the European Borrower, lowered the applicable margin on interest, lowered the Company's minimum required Consolidated Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement) to be maintained as well as provided for certain other less significant changes.
	The Amended Credit Agreement includes a senior revolving credit facility that allows for the borrowing of amounts up to a maximum of $170 million, including sublimits of $140 million in the United States and $30 million in Europe. Borrowings in both the United States and Europe are limited to the lesser of the sublimit(s) and the borrowing base as defined in the Amended Credit Agreement and are payable upon expiration of the Amended Credit Agreement or immediately, but only to the extent the applicable sublimit(s) are reduced to an amount less than the amount borrowed at that time. Our borrowing base is calculated by the lender each quarter unless our outstanding loan amount is greater than $5.0 million in which our borrowing base is calculated monthly. Our borrowing base is based on our amounts of receivables, inventories and other factors that influence the borrowing base and, to the extent any outstanding borrowing exceeds the borrowing base, any such excess is due and payable immediately.
	As of December 31, 2014, we had $8.0 million of borrowings outstanding under the Amended Credit Agreement, all of which was borrowed in the United States and bore interest at a rate of 2.58 percent as of December 31, 2014. As of December 31, 2014, our total remaining borrowing capacity under the Amended Credit Agreement was $26.0 million, consisting of $16.7 million in the United States and $9.3 million in Europe.
	Prior to August 15, 2012, borrowings bore interest at an interest rate equal to (1) the Eurodollar Rate (as defined in the Amended Credit Agreement) plus 2.00 percent or (2) the Base Rate (as defined in the Amended Credit Agreement) plus 1.00 percent. After August 15, 2012, the applicable margins for the Eurodollar Rate and the Base Rate are subject to adjustments based on average daily availability (as defined in the Amended Credit Agreement).
	Our U.S. obligations under the Amended Credit Agreement are guaranteed by the material domestic subsidiaries of Imation Corp. (the Guarantors) and are secured by a first priority lien (subject to customary exceptions) on the real property comprising Imation Corp.’s corporate headquarters and all of the personal property of Imation Corp., its subsidiary Imation Enterprises Corp., which is also an obligor under the Amended Credit Agreement, and the Guarantors. Borrowings under the U.S. portion of the Credit Facility are limited to the lesser of (a) $140 million and (b) the “U.S. borrowing base.” The U.S. borrowing base is equal to the following:
	•	up to 85 percent of eligible accounts receivable; plus
	•	up to the lesser of 65 percent of eligible inventory or 85 percent of the appraised net orderly liquidation value of eligible inventory; plus
	•	up to 60 percent of the appraised fair market value of eligible real estate (the Original Real Estate Value), such Original Real Estate Value to be reduced each calendar month by 1/120th, provided, that the Original Real Estate Value shall not exceed $40 million; plus
	•	such other classes of collateral as may be mutually agreed upon and at advance rates as may be determined by the Agent; minus
	•	such reserves as the Agent may establish in good faith.
	Our European obligations under the Credit Agreement are secured by a first priority lien on substantially all of the material personal property of the European Borrower. Borrowings under the European portion of the Credit Facility are limited to the lesser of (a) $30 million and (b) the “European borrowing base.” The European borrowing base calculation is fundamentally the same as the U.S. borrowing base, subject to certain differences to account for European law and other similar issues.
	The Amended Credit Agreement contains covenants which are customary for similar credit agreements, including covenants related to financial reporting and notification, payment of indebtedness, taxes and other obligations; compliance with applicable laws; and limitations regarding additional liens, indebtedness, certain acquisitions, investments and dispositions of assets. The Amended Credit Agreement contains a conditional financial covenant that requires Imation Corp. to have a Consolidated Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement) of not less than 1.00 or a liquidity requirement of $30 million of domestic borrowing availability. We were in compliance with the liquidity requirement as of December 31, 2014 and our U.S. availability of $16.7 million discussed above is net of this $30 million liquidity requirement. Additionally, as of December 31, 2014 and 2013 we had outstanding standby letters of credit of $1.0 million and $0.7 million, respectively. The outstanding standby letters of credit reduce our allowed borrowing capacity under the Amended Credit Agreement.
	On July 16, 2013, we entered into an additional credit agreement for a revolving credit facility with a lender in Japan with Imation Corporation Japan as the borrower and Imation Corp. as the guarantor. We intend to use the credit facility for general operating purposes. The credit agreement is a three year asset-based revolving credit facility with a borrowing base consistent with our existing Credit Agreement that allows for the borrowing of amounts up to 3.0 billion Japanese Yen, or approximately $25.0 million. Borrowings under the credit facility will bear interest at an interest rate equal to the base rate based on LIBOR or TIBOR plus the applicable margins provided for in the credit agreement. The credit agreement contains financial covenants applicable to Imation Corporation Japan including a fixed charge coverage ratio requirement. As of December 31, 2014 we had $7.9 million of borrowings outstanding under the agreement which had an interest rate of 2.7 percent. As of December 31, 2014, our remaining borrowing capacity under this arrangement was $7.9 million. We are in compliance with all covenant requirements as of December 31, 2014.
	As of December 31, 2014 we had a 600 million Japanese Yen, or approximately $5.0 million overdraft line of credit available in Japan. As of December 31, 2014, we had outstanding borrowings under this overdraft line of 300 million Japanese Yen or approximately $2.5 million. We had no borrowings outstanding on December 31, 2013.
	Other outstanding borrowings on lines of credit lines were $0.5 million and $0.1 million for December 31, 2014 and 2013, respectively.
	During 2014 we did not capitalize any debt issuance costs. During 2013 we capitalized $0.4 million of debt issue costs related to the Japan Credit Agreement. Capitalized debt issue costs are recorded to Other assets in our Consolidated Balance Sheets and are being amortized over the term of the credit agreements.
	Our interest expense, which includes letter of credit fees, facility fees, commitment fees under the Amended Credit Agreement and amortization of debt issuance costs, for 2014, 2013 and 2012 was $2.6 million, $2.5 million and $2.9 million, respectively. Cash paid for interest for 2014, 2013 and 2012, relating to both continuing and discontinued operations, was $1.8 million, $1.7 million and $2.4 million, respectively.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability, or the exit price in an orderly transaction between market participants on the measurement date. A three-level hierarchy is used for fair value measurements based upon the observability of the inputs to the valuation of an asset or liability as of the measurement date. Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs. A financial instrument's level within the hierarchy is based on the highest level of any input that is significant to the fair value measurement. Following is a description of our valuation methodologies used to estimate the fair value for our assets and liabilities.
	Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis
	The Company's non-financial assets such as goodwill, intangible assets and property, plant and equipment are recorded at fair value when an impairment is recognized or at the time acquired in a business combination. As discussed in Note 6 - Intangible Assets and Goodwill and Note 7 - Restructuring and Other Expense, during 2014 and 2012, we recorded impairment charges associated with goodwill, intangible assets or property, plant and equipment and reduced the carrying amount of such assets subject to the impairment to their estimated fair value. Additionally, as discussed in Note 4 - Acquisitions, the Company acquired Nexsan Corporation during 2012 and recorded the acquired assets and liabilities, including goodwill, intangible assets and property, plant and equipment at their estimated fair value. The determination of the estimated fair value of such assets required the use of significant unobservable inputs which would be considered Level 3 fair value measurements.
	Assets and Liabilities that are Measured at Fair Value on a Recurring Basis
	The Company measures certain assets and liabilities at their estimated fair value on a recurring basis, including cash and cash equivalents, derivative instruments and our contingent consideration obligations associated with certain acquisitions.
	Derivative Financial Instruments
	We maintain a foreign currency exposure management policy that allows the use of derivative instruments, principally foreign currency forward, option contracts and option combination strategies to manage risks associated with foreign exchange rate volatility. Generally, these contracts are entered into to fix the U.S. dollar amount of the eventual cash flows. The derivative instruments range in duration at inception from between one to 16 months. The fair value of our derivative instruments is determined based on inputs that are observable in the public market, but are other than publicly quoted prices (Level 2). We are exposed to the risk of nonperformance by our counter-parties, but we do not anticipate nonperformance by any of these counter-parties. We actively monitor our exposure to credit risk through the use of credit approvals and credit limits and by using major international banks and financial institutions as counter-parties.
	Cash Flow Hedges. We attempt to substantially mitigate the risk that forecasted cash flows denominated in foreign currencies may be adversely affected by changes in the currency exchange rates through the use of option, forward and combination option contracts. The degree of our hedging can fluctuate based on management judgment and forecasted projections. We formally document all relationships between hedging instruments and hedged items, as well as our risk management objective and strategy for undertaking the hedged items. This process includes linking all derivatives to forecasted transactions. We formally assess, both at the hedge's inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting changes in the cash flows of hedged items. At December 31, 2014 and 2013, our contracts had durations of 12 months or less. The fair value of these contracts is recorded in other current assets and other current liabilities on our Consolidated Balance Sheets.
	Gains and losses related to cash flow hedges are deferred in accumulated other comprehensive loss with a corresponding asset or liability. When the hedged transaction occurs, the gains and losses in accumulated other comprehensive loss are reclassified into our Consolidated Statements of Operations in the same line as the item being hedged. If at any time it is determined that a derivative is not highly effective as a hedge, we discontinue hedge accounting prospectively, with deferred gains and losses being recognized in current period operations. The following table sets forth our cash flow hedges which are measured at fair value on a recurring basis.
		December 31, 2014						December 31, 2013
		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Unobservable		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs (Level 2)			Unobservable
		(Level 1)		(Level 2)		Inputs		(Level 1)					Inputs
						(Level 3)							(Level 3)
		(In millions)
	Derivative assets
	Foreign currency option contracts	$	—	$	—	$	—	$	—	$	1.8		$	—
	Foreign currency forward contracts	—		7.3		—		—		3.3			—
	Derivative liabilities
	Foreign currency option contracts	—		—		—		—		(0.2		)	—
	Foreign currency forward contracts	—		—		—		—		(0.5		)	—
	Total	$	—	$	7.3	$	—	$	—	$	4.4		$	—
	Other Derivative Instruments. We use foreign currency forward contracts to manage the foreign currency exposure related to our monetary assets and liabilities denominated in foreign currencies. We record the estimated fair value of these forward contracts within other current assets or other current liabilities on our Consolidated Balance Sheets and because we do not receive hedge accounting for these derivatives, changes in their value are recognized every reporting period in our Consolidated Statements of Operations.
	For 2014, 2013 and 2012 we recorded foreign currency losses of $2.2 million, gains of $0.5 million, and losses of $1.6 million, respectively, in Other expenses, net in our Consolidated Statements of Operations. These results reflect changes in foreign exchange rates on foreign denominated assets and liabilities and are net of losses of $0.8 million and gains of $1.7 million and $0.7 million, from the related foreign currency forward contracts for 2014, 2013 and 2012, respectively.
	The notional amounts and fair values of our derivative instruments recorded in other current assets and other current liabilities in our Consolidated Financial Statements were as follows:
		December 31, 2014						December 31, 2013
				Fair Value						Fair Value
		Notional Amount		Other Current Assets		Other Current Liabilities		Notional Amount		Other Current Assets			Other Current Liabilities
		(In millions)
	Cash flow hedges designated as hedging instruments	$	86.7	$	7.3	$	—	$	133.8	$	5.1		$	(0.7	)
	Other hedges not receiving hedge accounting	23.4		—		—		29.4		—			—
	Total	$	110.1	$	7.3	$	—	$	163.2	$	5.1		$	(0.7	)
	On December 31, 2014 we entered into certain hedges not receiving hedge accounting treatment and the estimated fair value of these hedges were inconsequential as of December 31, 2014.
	Other Assets and Liabilities
	The carrying value of accounts receivable and accounts payable approximate their fair values due to the short-term duration of these items. Additionally, our borrowings of $18.9 million of outstanding debt under our credit facilities at December 31, 2014, as further described in Note 11 - Debt, approximates fair value due to the short nature of this debt.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity
	Shareholder Rights Plan
	Effective February 11, 2013, our Board of Directors amended the Rights Agreement dated as of June 21, 2006 to change the final expiration date from July 1, 2016 to February 11, 2013, effectively terminating the Rights Agreement. This amendment had no accounting implications to the Company.
	Treasury Stock
	On May 2, 2012, our Board of Directors authorized a share repurchase program that allowed for the repurchase of 5.0 million shares of common stock. Since the inception of this authorization, we have repurchased 2.6 million shares of common stock for $11.6 million and, as of December 31, 2014, we had authorization to repurchase up to 2.4 million additional shares. The treasury stock held as of December 31, 2014 was acquired at an average price of $15.31 per share. The following is a summary of treasury share activity:
		Treasury Shares
	Balance as of December 31, 2011	4,663,923
	Purchases	1,236,161
	Exercise of stock options	—
	Restricted stock grants and other	(499,851	)
	401(k) matching contribution	(517,588	)
	Shares issued for acquisition	(3,319,324	)
	Balance as of December 31, 2012	1,563,321
	Purchases	616,581
	Exercise of stock options	—
	Restricted stock grants and other	(622,241	)
	401(k) matching contribution	(435,735	)
	Balance as of December 31, 2013	1,121,926
	Purchases	760,268
	Exercise of stock options	(87,569	)
	Restricted stock grants and other	(739,408	)
	401(k) matching contribution	(427,421	)
	Balance as of December 31, 2014	627,796
	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss and related activity consisted of the following:
		Gains (Losses) on Derivative Financial Instruments			Defined Benefit Plans			Foreign Currency Translation			Total
		(In millions)
	Balance as of December 31, 2013	$	2.4		$	(11.6	)	$	(53.6	)	$	(62.8	)
	Other comprehensive (loss) income before reclassifications, net of tax (1)	6.1			(10.4		)	(15.7		)	(20.0		)
	Amounts reclassified from accumulated other comprehensive loss, net of tax	(3.4		)	1.4			—			(2.0		)
	Net current period other comprehensive income (loss)	2.7			(9.0		)	(15.7		)	(22.0		)
	Balance as of December 31, 2014	$	5.1		$	(20.6	)	$	(69.3	)	$	(84.8	)
	(1) Income tax expense of $3.1 million was recorded for unrealized gains on derivative financial instruments and income tax benefit of $1.7 million for liability adjustments for defined benefit plans for the year ended December 31, 2014.
	Details of amounts reclassified from Accumulated other comprehensive loss and the line item in our Consolidated Statement of Operations for the year ended December 31, 2014 are as follows:
		Amounts Reclassified from Accumulated Other Comprehensive Loss			Affected Line Item in the Statement Where Net Loss is Presented
		(In millions)
	(Gains) losses on cash flow hedges	$	(5.5	)	Cost of goods sold
	Income tax expense	2.1			Income tax (benefit) provision
	Net (gains) losses on cash flow hedges	(3.4		)
	Amortization of net actuarial loss	0.2			Selling, general and administrative
	Pension settlement loss	1			Restructuring and other
	Income tax expense	0.2			Income tax (benefit) provision
	Net pension adjustments, net of tax	1.4
	Total reclassifications for the period	$	(2.0	)
	Income taxes are not provided for foreign translation relating to permanent investments in international subsidiaries. Reclassification adjustments are made to avoid double counting in comprehensive loss items that are also recorded as part of net loss and are presented net of taxes in the Consolidated Statements of Comprehensive Loss.

Business_Segment_Information_a

Business Segment Information and Geographic Data	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Business Segment Information and Geographic Data	Business Segment Information and Geographic Data
	In the first quarter of 2013, we revised our segment reporting to reflect changes in how we manage our business, review operating performance and allocate resources. We now manage our business through two reporting segments, Consumer Storage and Accessories (CSA) and Tiered Storage and Security Solutions (TSS). Our new reporting segments are generally aligned with our key consumer and commercial channels.
	We also have two major product categories under our CSA segment: Consumer Storage Media and Audio and Accessories. Consumer Storage Media products include primarily optical products such as DVDs, CDs and Blu-ray disc recordable media as well as flash media. Audio and Accessories include primarily headphones, audio electronics and accessories. We have two major product categories under our TSS segment: Commercial Storage Media and Storage and Security Solutions. Commercial Storage Media products consist mainly of magnetic data storage tape media and RDX media. Storage and Security Solutions includes storage hardware products, services and software for backup and archiving as well as primary storage; encrypted and biometric flash drives and hard disk drives; secure portable desktop solutions; and software solutions, including products which contain various security features such as password authentication, encryption and remote manageability.
	We evaluate segment performance based on revenue and operating income (loss). The operating income (loss) reported in our segments excludes corporate and other unallocated amounts. Although such amounts are excluded from the business segment results, they are included in reported consolidated results. Corporate and unallocated amounts include depreciation and amortization, litigation settlement expense, goodwill impairment, intangible impairments, intangible asset abandonment, corporate expense, contingent consideration adjustments, inventory write-offs related to our restructuring programs and restructuring and other expenses which are not allocated to the segments. The methodology to determine corporate and unallocated amounts is applied consistently among all years.
	During the first quarter of 2013, we announced our plans to divest our XtremeMac and Memorex consumer electronics businesses. The operating results for these businesses are presented in our Consolidated Statements of Operations as discontinued operations and are not included in segment results for any periods presented. The consumer storage business under the Memorex and TDK Life on Record brands and the consumer electronics business under the TDK Life on Record brand are being retained. See Note 4 - Acquisitions and Divestitures for further information.
	Net revenue and operating income (loss) by segment were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net Revenue
	Consumer Storage and Accessories
	Consumer Storage Media	$	342.9		$	435.7		$	594.3
	Audio and Accessories	50.6			42.6			41
	Total Consumer Storage and Accessories	393.5			478.3			635.3
	Tiered Storage and Security Solutions
	Commercial Storage Media	213.4			251			311.6
	Storage and Security Solutions	122.6			131.5			59.8
	Total Tiered Storage and Security Solutions	336			382.5			371.4
	Total Net Revenue	$	729.5		$	860.8		$	1,006.70
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Operating Income (Loss)
	Consumer Storage and Accessories	$	19.3		$	52.3		$	61.5
	Tiered Storage and Security Solutions	(32.0		)	(16.1		)	(26.7		)
	Total segment operating income (loss)	(12.7		)	36.2			34.8
	Corporate and unallocated	(91.4		)	(56.3		)	(353.2		)
	Total operating loss	(104.1		)	(20.1		)	(318.4		)
	Interest income	(0.5		)	(0.2		)	(0.5		)
	Interest expense	2.6			2.5			2.9
	Other expense, net	3.1			0.6			2.6
	Loss from continuing operations before income taxes	$	(109.3	)	$	(23.0	)	$	(323.4	)
	We have not provided specific asset information by segment, as it is not provided to our chief operating decision maker for review at a segment specific level. Corporate and unallocated amounts above include non-cash goodwill impairment charges of $35.4 million and $23.3 million for the years ended December 31, 2014 and 2012, respectively, non-cash intangible asset impairment charges of $251.8 million for the year ended December 31, 2012, restructuring and other costs of $13.6 million, $11.3 million and $21.1 million for the years ended December 31, 2014, 2013 and 2012, respectively and litigation settlement gains of $2.5 million for the year ended December 31, 2013.
	The following table presents net revenue by geographical region based on the country in which the revenue originated:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net Revenue
	United States	$	253.6		$	348.1		$	376.2
	International	475.9			512.7			630.5
	Total	$	729.5		$	860.8		$	1,006.70
	The United States and Japan each comprise more than 10 percent of our total net revenue. Net revenue from Japan was 23.5 percent, 20.6 percent and 21.0 percent of total net revenue for the years ended December 31, 2014, 2013 and 2012, respectively.
	The following table presents long-lived assets by geographical region:
		As of December 31,
		2014			2013			2012
		(In millions)
	Long-Lived Assets
	United States	$	121.6		$	150.7		$	166.9
	International	17.4			41.6			47.4
	Total	$	139		$	192.3		$	214.3

Litigation_Commitments_and_Con

Litigation, Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Litigation, Commitments and Contingencies	Litigation, Commitments and Contingencies
	Litigation
	In the normal course of business, we periodically enter into agreements that incorporate general indemnification language. Performance under these indemnities would generally be triggered by a breach of terms of the contract or by a supportable third-party claim. There have historically been no material losses related to such indemnifications. As of December 31, 2014 and 2013, estimated liability amounts associated with such indemnifications are inconsequential.
	We are the subject of various pending or threatened legal actions in the ordinary course of our business. All such matters are subject to many uncertainties and outcomes that are not predictable with assurance. Additionally, our businesses are subject to allegations of patent infringement by our competitors as well as by non-practicing entities (NPEs), sometimes referred to as “patent trolls,” who may seek monetary settlements from us, our competitors, suppliers and resellers, including the One-Blue litigation described below. Consequently, as of December 31, 2014, we are unable to reasonably estimate the ultimate aggregate amount of any monetary liability or financial impact that we may incur with respect to these matters. It is reasonably possible that the ultimate resolution of these matters could materially affect our financial condition, results of operations and cash flows.
	On May 22, 2013, Imation was sued in U.S. District Court for the District of Delaware by five entities: One-Blue, LLC (One-Blue), which is an entity with licensing authority for a pool of patents relating to Blu-ray discs, and four members of One-Blue, Koninklijke Philips N.V., Panasonic Corporation, Pioneer Corporation and Sony Corporation. The plaintiffs allege that Imation's sales of certain Blu-ray discs infringe six patents and seek unspecified damages, treble damages, and attorney's fees. On June 13, 2013, Imation filed an Answer, Affirmative Defenses, and Counterclaims, naming various defenses including that plaintiffs are barred, in whole or in part, from any recovery or relief by their refusal to license the patents-in-suit under fair, reasonable, and nondiscriminatory terms. Imation intends to vigorously defend the case. This matter is now in the discovery phase for issues relating to determination of a fair, reasonable, and nondiscriminatory royalty rate. Imation has notified its manufacturers of their indemnity obligations that it believes cover a portion of its liability, if any, to One-Blue and the other plaintiffs. In addition, Imation has a dispute with One-Blue regarding One-Blue's refusal to license its Japanese Blu-ray patents under fair, reasonable, and nondiscriminatory terms in Japan, where Imation’s sales of Blu-ray discs are substantially greater than in the U.S. Imation Corporation Japan, Imation's Japanese subsidiary, has sued One-Blue in Japan regarding its unlawful interference with certain of our customer relationships. On February 18, 2015, the Tokyo District Court rendered a decision in favor of Imation that held One-Blue's sending of warning letters to Imation customers that threatened those customers with certain patent-related actions constituted an illegal "unfair competition practice" and issued a permanent injunction prohibiting One-Blue from sending any such warning letters in the future.
	SpearPoint Capital Fund LP et al. v. Mark E. Lucas, et al. This shareholder derivative action was filed in Delaware Chancery Court on February 9, 2015. It names as defendants the Company and the members of its Board of Directors. Plaintiffs contend that the defendants paid excessive compensation to the directors. They seek damages for breaches of fiduciary duties, waste of corporate assets and unjust enrichment. They also seek corporate governance reforms related to the Company’s compensation practices. The Company has not yet responded to the complaint and no trial date has been set.
	Operating Leases
	We incur rent expense under operating leases, which primarily relate to equipment and office space. Most long-term leases include one or more options to renew at the then fair rental value for a period of approximately one to three years. The following table sets forth the components of net rent expense for the years ended December 31:
		2014			2013			2012
		(In millions)
	Minimum lease payments	$	7.8		$	8.5		$	6.1
	Contingent rentals	1.6			3.8			6.1
	Rental income	(8.6		)	(8.4		)	(3.4		)
	Sublease income	—			(0.5		)	(0.7		)
	Total rental expense, net	$	0.8		$	3.4		$	8.1
	Minimum lease payments and contingent rental expenses associated with agreements with warehouse providers are included as a component of cost of goods sold in our Consolidated Statements of Operations. The minimum lease payments under such arrangements were $0.8 million, $0.9 million and $0.8 million in 2014, 2013 and 2012, respectively. The contingent rental expenses under such arrangements were $1.8 million, $2.8 million and $1.8 million in 2014, 2013 and 2012, respectively.
	The following table sets forth the minimum rental payments under operating leases with non-cancelable terms in excess of one year as of December 31, 2014:
		2015			2016			2017			2018		2019		Thereafter		Total
		(In millions)
	Minimum lease payments	$	5		$	3.7		$	2.9		$	1.6	$	0.6	$	1.4	$	15.2
	Environmental Matters
	Our operations are subject to a wide range of federal, state and local environmental laws. Environmental remediation costs are accrued when a probable liability has been determined and the amount of such liability has been reasonably estimated. These accruals are reviewed periodically as remediation and investigatory activities proceed and are adjusted accordingly. Compliance with environmental regulations has not had a material adverse effect on our financial results. As of December 31, 2014, we had environmental-related accruals totaling $0.2 million recorded in other liabilities and we have minor remedial activities underway at one of our prior manufacturing facilities. We believe that our accruals are adequate, though it is reasonably possible that the ultimate amount of expense relating to remediation actions and compliance with applicable environmental laws could have a material impact on our results of operations.
	Copyright Levies
	In many European Union (EU) member countries, the sale of recordable optical media is subject to a private copyright levy. The levies are intended to compensate copyright holders with "fair compensation" for the harm caused by private copies made by natural persons of protected works under the European Copyright Directive, which became effective in 2002 (Directive). Levies are generally charged directly to the importer of the product upon the sale of the products. Payers of levies remit levy payments to collecting societies which, in turn, are expected to distribute funds to copyright holders. Levy systems of EU member countries must comply with the Directive, but individual member countries are responsible for administering their own systems. Since implementation, the levy systems have been the subject of numerous litigation and law making activities. On October 21, 2010, the European Court of Justice (ECJ) ruled that fair compensation is an autonomous European law concept that was introduced by the Directive and must be uniformly applied in all EU member states. The ECJ stated that fair compensation must be calculated based on the harm caused to the authors of protected works by private copying. The ECJ also stated that the indiscriminate application of the private copying levy to devices not made available to private users and clearly reserved for uses other than private copying is incompatible with the Directive. The ECJ ruling made clear that copyright holders are only entitled to fair compensation payments (funded by levy payments made by importers of applicable products, including the Company) when sales of optical media are made to natural persons presumed to be making private copies. Within this disclosure, we use the term "commercial channel sales" when referring to products intended for uses other than private copying and "consumer channel sales" when referring to products intended for uses including private copying.
	Since the Directive was implemented in 2002, we estimate that we have paid in excess of $100 million in levies to various ongoing collecting societies related to commercial channel sales. Based on the ECJ's October 2010 ruling and subsequent litigation and law making activities, we believe that these payments were not consistent with the Directive and should not have been paid to the various collecting societies. Accordingly, subsequent to the October 21, 2010 ECJ ruling, we began withholding levy payments to the various collecting societies and, in 2011, we reversed our existing accruals (totaling $7.8 million) for unpaid levies related to commercial channel sales. However, we continued to accrue, but not pay, a liability for levies arising from consumer channel sales, in all applicable jurisdictions except Italy and France due to court rulings that are discussed below. As of December 31, 2014 and 2013, we had accrued liabilities of $9.3 million and $10.0 million, respectively, associated with levies related to consumer channel sales for which we are withholding payment.
	Since the October 2010 ECJ ruling, we evaluate quarterly on a country-by-country basis whether (i) levies should be accrued on current period commercial and/or consumer channel sales; and, (ii) whether accrued, but unpaid, copyright levies on prior period consumer channel sales should be reversed. Our evaluation is made on a jurisdiction-by-jurisdiction basis and considers ongoing and cumulative developments related to levy litigation and law making activities within each jurisdiction as well as throughout the EU. See following for discussion of reversals of copyright levies in 2013.
	Italy. During the second quarter of 2013, an Italian court rendered a decision associated with a copyright levy matter to which Imation was not a party. This decision (i) confirmed and provided further specificity to the October 21, 2010 ruling of the ECJ that levies should not be paid on commercial channel sales and (ii) evaluated, via audit, the plaintiff's documentation and evidence for distinguishing between levies paid on commercial and consumer channel sales. Based on the ruling of this Italian court, in combination with other applicable levy and law-making activities within the EU, including Italy, we believed there was sufficient evidence that we may offset with the Italian collecting society the estimated $39.0 million we have overpaid for copyright levies in Italy (due to us paying levies on commercial channel sales prior to the October 21, 2010 ECJ ruling) against the amounts owed to the Italian collecting society for unpaid levies on consumer channel sales. As such, our liability for Italian copyright levies in the amount of $13.6 million (existing at the time of the of the second quarter 2013 Italian court decision) that arose from consumer channel sales that had been accrued but not paid was reversed and recorded as a reduction of cost of sales during the second quarter of 2013. We did not record a receivable for the remaining estimated $25.4 million that we believed was owed to us by the Italian collection society for our historical over payment on levies associated with commercial channel sales as we are not assured of its collectability. Rather, going forward, such amount began to be realized as a reduction to cost of goods sold upon the incurrence of (and for the same amount of) valid levies for consumer channel sales. During the last half of 2013 we offset an additional $2.6 million (within cost of sales) and in 2014 we offset $3.4 million (within cost of sales) against a similar amount of consumer channel levies incurred and, accordingly, we have an estimated $19.4 million of historical over payments of levies on commercial channel sales remaining to set-off in future periods.
	The Italian court required sufficient documentation and evidence to support the determination of levies between those paid on commercial versus consumer channel sales. We believe that we have utilized a methodology, and have sufficient documentation and evidence, to fully support our estimates that we have overpaid $39.0 million to the Italian collection society of levies on commercial channel sales and that we had incurred (but not paid) $19.6 million of levies on consumer channel sales in Italy. However, such amounts could be subject to challenge in court and there is no certainty that our estimates would be upheld and supported. Additionally, due to the expected continued decline in our sales associated with optical media products, we cannot be assured that we will ever be able to fully realize the estimated amounts owed to us by the Italian collection society through offsetting such amounts against levies incurred on future consumer channel sales or other measures.
	France. During the fourth quarter of 2013, a French court issued a favorable ruling to Imation in a case brought against Imation in the fourth quarter of 2011 by the French levy society, Societie Pour la Perception de la Remuneration de la Copie Privee Audiovisuelle et Sonore (Copie France). Copie France had sought a judicial order in summary proceedings to compel Imation to pay to Copie France $3.6 million in withheld copyright levies. Imation had withheld levies otherwise due on consumer channel sales against previous levies paid on commercial channel sales. Imation argued that there was a serious legal dispute as to whether the demanded sums were owed, in light of what Imation believed to be the inconsistency between the French levy system and the Directive, as interpreted by ECJ case law. In June 2012, the Paris Court of First Instance had rejected Copie France’s claims, ruling that Imation had raised serious issues about the validity of the French levy scheme. Copie France appealed that order, and on November 19, 2013, the French appeals court rejected Copie France’s appeal. Based on the rulings of the French courts, in combination with other applicable levy and law-making activities within the EU, including France, we believe there is sufficient evidence that we may offset with Copie France the estimated $55.1 million we have overpaid for copyright levies in France (due to us paying levies on commercial channel sales prior to the October 21, 2010 ECJ ruling) against the amounts owed to Copie France for unpaid levies on consumer channel sales. As such, our liability for French copyright levies in the amount of $9.5 million (existing at the time of the of the fourth quarter 2013 French court decision) that arose from consumer channel sales that had been accrued but not paid was reversed and recorded as a reduction of cost of sales during the fourth quarter of 2013. We did not record a receivable for the remaining estimated $45.6 million that we believe is owed to us by Copie France for our historical over payment on levies associated with commercial channel sales as we are not assured of its collectability. Rather, going forward, such amount will be realized as a reduction to cost of sales upon the incurrence of (and for the same amount of) valid levies for consumer channel sales. During 2014, we have off-set an additional $2.6 million (within cost of sales) against a similar amount of consumer channel levies incurred and, accordingly, we have an estimated $43.0 million of historical over payments of levies on commercial channel sales remaining to set-off in future periods.
	We believe that we have utilized a methodology, and have sufficient documentation and evidence, to fully support our estimates that we have overpaid $55.1 million to the French collection society of levies on commercial channel sales and that we have incurred (but not paid) $12.1 million of levies on consumer channel sales in France. However, such amounts could be subject to challenge in court and there is no certainty that our estimates would be upheld and supported. Additionally, due to the expected continued decline in our sales associated with optical media products, we cannot be assured that we will ever be able to fully realize the estimated amounts owed to us by the French collection society through offsetting such amounts against levies incurred on future consumer channel sales or other measures.
	Other Jurisdictions. At December 31, 2014, the recovery of some or all of the copyright levies previously paid on commercial sales in EU jurisdictions other than Italy and France represents a gain contingency that has not yet met the required criteria for recognition in our financial statements. There is no assurance that we will realize any of this gain contingency. We have an estimated $8.3 million of accrued but unpaid levies associated with consumer sales in EU jurisdictions other than Italy and France that we continue to carry on our books.
	We are subject to several pending or threatened legal actions by the individual European national levy collecting societies in relation to private copyright levies under the Directive. Those actions generally seek payment of the commercial and consumer optical levies withheld by Imation. Imation has corresponding claims in those actions seeking reimbursement of levies improperly collected by those collecting societies. We are subject to threatened actions by certain customers of Imation seeking reimbursement of funds they allege relate to commercial levies that they claim they should not have paid. Although these actions are subject to the uncertainties inherent in the litigation process, based on the information presently available to us, management does not expect that the ultimate resolution of these actions will have a material adverse effect on our financial condition, results of operations or cash flows. We anticipate that additional court decisions may be rendered in 2015 that may directly or indirectly impact our levy exposure in specific European countries which could trigger a review of our levy exposure in those countries.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	As a result of the arrangement to acquire the rights to the TDK Life on Record brand under an exclusive long-term license from TDK Corporation (TDK), TDK owned approximately 18 percent of our shares as of December 31, 2014 and 2013. In connection with this arrangement, we entered into a supply agreement, dated July 31, 2007, with TDK (Supply Agreement).
	In 2014, 2013 and 2012 we purchased products and services under the Supply Agreement which allowed us to purchase a limited number of LTO Tape media and Blu-ray removable recording media and accessory products for resale in the aggregate amounts of approximately $3 million, $28 million and $38 million, respectively, from TDK or its affiliates. The Supply Agreement was terminated on March 31, 2014. We did not sell products nor provide services to TDK or its affiliates in 2014, 2013 or 2012. No trade payables to TDK or its affiliates were outstanding at December 31, 2014 and were $1.6 million at December 31, 2013. No trade receivables from TDK or its affiliates were outstanding as of December 31, 2014 or December 31, 2013.
	In 2011, we discontinued our tape coating operations at our Weatherford, Oklahoma facility and closed the facility. We signed a strategic agreement with TDK to jointly develop and manufacture magnetic tape technologies in which we collaborated on the research and development of future tape formats in both companies’ research centers in the U.S. and Japan. At the end of 2013, TDK announced its intent to cease manufacturing of magnetic tape and, as a result, we transitioned to source our product from alternate magnetic tape suppliers during 2014.

Quarterly_Data_Unaudited

Quarterly Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Data (Unaudited)	Quarterly Data (Unaudited)
		First			Second			Third			Fourth			Total(1)
		(In millions, except per share amounts)
	2013
	Net revenue	$	224.4		$	211.7		$	191.9		$	232.8		$	860.8
	Gross profit	42.1			55.2			36.1			55.3			188.7
	Operating (loss) income	(14.7		)	—			(26.5		)	21.1			(20.1		)
	(Loss) income from continuing operations	(15.6		)	(1.8		)	(26.2		)	19.2			(24.4		)
	Loss from discontinued operations	(5.5		)	(3.3		)	(8.7		)	(2.5		)	(20.0		)
	Net (loss) income	(21.1		)	(5.1		)	(34.9		)	16.7			(44.4		)
	(Loss) earnings per common share, continuing operations:
	Basic	$	(0.39	)	$	(0.04	)	$	(0.65	)	$	0.47		$	(0.60	)
	Diluted	(0.39		)	(0.04		)	(0.65		)	0.47			(0.60		)
	Loss per common share, discontinued operations:
	Basic	(0.14		)	(0.08		)	(0.21		)	(0.06		)	(0.49		)
	Diluted	(0.14		)	(0.08		)	(0.21		)	(0.06		)	(0.49		)
	(Loss) earnings per common share, net income:
	Basic	(0.52		)	(0.13		)	(0.86		)	0.41			(1.10		)
	Diluted	(0.52		)	(0.13		)	(0.86		)	0.41			(1.10		)
	2014
	Net revenue	$	178.9		$	178.6		$	175		$	197		$	729.5
	Gross profit	33.7			33.9			31.2			39.6			138.4
	Operating loss	(16.1		)	(20.1		)	(55.8		)	(12.1		)	(104.1		)
	Loss from continuing operations	(16.8		)	(19.8		)	(61.4		)	(14.4		)	(112.4		)
	Loss from discontinued operations	(0.7		)	(1.6		)	—			—			(2.3		)
	Net loss	(17.5		)	(21.4		)	(61.4		)	(14.4		)	(114.7		)
	Loss per common share, continuing operations:
	Basic	$	(0.41	)	$	(0.48	)	$	(1.49	)	$	(0.35	)	$	(2.74	)
	Diluted	(0.41		)	(0.48		)	(1.49		)	(0.35		)	(2.74		)
	Loss per common share, discontinued operations:
	Basic	(0.02		)	(0.04		)	—			—			(0.06		)
	Diluted	(0.02		)	(0.04		)	—			—			(0.06		)
	Loss per common share, net income:
	Basic	(0.43		)	(0.52		)	(1.49		)	(0.35		)	(2.80		)
	Diluted	(0.43		)	(0.52		)	(1.49		)	(0.35		)	(2.80		)
	_______________________________________
	(1)	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation	The financial statements are presented on a consolidated basis and include the accounts of the Company and our wholly-owned subsidiaries. See Note 2 - Summary of Significant Accounting Policies for further information regarding consolidation. Our Consolidated Financial Statements are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). All significant inter-company transactions have been eliminated.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported asset and liability amounts and the contingent asset and liability disclosures at the date of the financial statements, as well as the revenue and expense amounts reported during the period. Actual results could differ from those estimates.
Foreign Currency	For our international operations, where the local currency has been determined to be the functional currency, assets and liabilities are translated at year-end exchange rates with cumulative translation adjustments included as a component of shareholders’ equity. Income and expense items are translated at average foreign exchange rates prevailing during the year. Gains and losses from foreign currency transactions are included in our Consolidated Statements of Operations.
Cash Equivalents and Restricted Cash	Cash equivalents consist of highly liquid investments with an original maturity of three months or less at the time of purchase. The carrying amounts reported in our Consolidated Balance Sheets for cash equivalents approximate fair value.
	Restricted Cash. Cash related to contractual obligations or restricted by management for specific use is classified as restricted and is included in other assets on our Consolidated Balance Sheets.
Trade Accounts Receivable and Allowances	Trade accounts receivable are stated net of estimated allowances, which primarily represent estimated amounts associated with customer returns, discounts on payment terms and the inability of certain customers to make the required payments. When determining the allowances, we take several factors into consideration, including prior history of accounts receivable credit activity and write-offs, the overall composition of accounts receivable aging, the types of customers and our day-to-day knowledge of specific customers. Changes in the allowances are recorded as reductions of net revenue or as bad debt expense (included in selling, general and administrative expense), as appropriate, in our Consolidated Statements of Operations. In general, accounts which have entered into an insolvency action, have been returned by a collection agency as uncollectible or whose existence can no longer be confirmed are written off in full and both the receivable and the associated allowance are removed from our Consolidated Balance Sheet. If, subsequent to the write-off, a portion of the account is recovered, it is recorded as a reduction of bad debt expense in our Consolidated Statements of Operations at the time cash is received.
Inventories	Inventories are valued at the lower of cost or market, with cost determined on a first-in, first-out basis. We provide estimated inventory write-downs for excess, slow-moving and obsolete inventory as well as inventory with a carrying value in excess of estimated net realizable value.
Derivative Financial Instruments	We recognize all derivatives on the balance sheet at their estimated fair value. Fair value of our derivative contracts with durations of twelve months or less are classified as current and durations of greater than twelve months as non-current. Changes in the estimated fair value of derivatives that are not designated as, and qualify for, hedge accounting are recorded in our results of operations. We do not hold or issue derivative financial instruments for speculative or trading purposes, and we are not a party to leveraged derivatives. If a derivative is designated as, and qualifies for, hedge accounting, depending on the nature of the hedge, changes in the fair value of the derivative are either offset against the change in fair value of the underlying assets or liabilities through operations or recognized in accumulated other comprehensive loss in shareholders’ equity until the underlying hedged item is recognized in operations. These gains and losses are generally recognized as an adjustment to cost of goods sold for inventory-related hedge transactions, or as adjustments to foreign currency transaction gains or losses included in non-operating expenses for foreign denominated payables- and receivables-related hedge transactions. Cash flows attributable to these derivatives are included with cash flows of the associated hedged items. The ineffective portion of a derivative’s change in fair value is immediately recognized in our Consolidated Statements of Operations. See Note 12 - Fair Value Measurements for more information on our derivative financial instruments.
Property, Plant and Equipment	Property, plant and equipment, including leasehold and other improvements that extend an asset’s useful life or productive capabilities, are recorded at cost. Maintenance and repairs are expensed as incurred. The cost and related accumulated depreciation of assets sold or otherwise disposed are removed from the related accounts, and the gains or losses are reflected in the results of operations.
	Property, plant and equipment are generally depreciated on a straight-line basis over their estimated useful lives. The estimated depreciable lives range from 10 to 20 years for buildings and 5 to 10 years for machinery and equipment. Leasehold and other improvements are amortized over the remaining life of the lease or the estimated useful life of the improvement, whichever is shorter.
Intangible Assets	Intangible assets include principally trade names and customer relationships and are amortized using methods that approximate the benefit provided by utilization of the assets, which may be on a straight-line or accelerated basis depending on the intangible asset.
	We record all assets and liabilities acquired in purchase acquisitions, including intangibles, at estimated fair value. The initial recognition of intangible assets, the determination of useful lives and, if necessary, subsequent impairment analyses require management to make subjective estimates of how the acquired assets will perform in the future using certain valuation methods. See Note 6 - Intangible Assets and Goodwill for further information on our intangible assets and impairment testing.
Internal Use Software	We capitalize costs of software developed or obtained for internal use, once the preliminary project stage has been completed, management commits to funding the project and it is probable that the project will be completed and the software will be used to perform the function intended. Capitalized costs include only (1) external direct costs of materials and services consumed in developing or obtaining internal-use software, (2) payroll and payroll-related costs for employees who are directly associated with and who devote time to the internal-use software project and (3) interest costs incurred, when material, while developing internal-use software. Capitalization of costs ceases when the project is substantially complete and ready for its intended use.
Goodwill	Goodwill is the excess of the cost of an acquired entity over the estimated fair value of assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually as of November 30th, or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Goodwill is considered impaired when its carrying amount exceeds its implied fair value. The Company may assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount, including goodwill. If we determine in this assessment that the fair value of the reporting unit is more than its carrying amount we may conclude that there is no need to perform Step 1 of the impairment test. We have an unconditional option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing Step 1 of the goodwill impairment test.
	Step 1 of the impairment test involves comparing the fair value of the reporting unit to which goodwill was assigned to its carrying amount. If fair value is deemed to be less than carrying value, Step 2 of the impairment test compares the implied fair value of the reporting unit's goodwill with the carrying amount of the reporting unit's goodwill. If the carrying amount of the reporting unit's goodwill is greater than the implied fair value of the reporting unit's goodwill, an impairment loss must be recognized for the excess. This involves measuring the fair value of the reporting unit's assets and liabilities (both recognized and unrecognized) at the time of the impairment test. The difference between the reporting unit's fair value and the fair values assigned to the reporting unit's individual assets and liabilities is the implied fair value of the reporting unit's goodwill. See Note 6 - Intangible Assets and Goodwill for further information on our goodwill and impairment testing.
Impairment of Long-Lived Assets	We periodically review the carrying value of our property and equipment and our intangible assets to test whether current events or circumstances indicate that such carrying value may not be recoverable. For the testing of long-lived assets that are "held for use," if the tests indicate that the carrying value of the asset group that contains the long-lived asset being evaluated is greater than the expected undiscounted cash flows to be generated by such asset or asset group, an impairment loss would be recognized. The impairment loss is determined by the amount by which the carrying value of such asset group exceeds its estimated fair value. We generally measure fair value by considering sale prices for similar assets or by discounting estimated future cash flows from such assets using an appropriate discount rate. See Note 6 - Intangible Assets and Goodwill for further information on impairment testing.
	Assets to be disposed of and qualify as being "held for sale" are carried at the lower of their carrying value or fair value less costs to sell. Management judgment is necessary to estimate the fair value of assets and, accordingly, actual results could vary significantly from such estimates.
Revenue Recognition	We sell a wide range of data storage, mobile security and consumer storage solutions audio products and accessories. Net revenue consists primarily of data storage, mobile security, magnetic, optical, flash media, consumer electronics and accessories sales. We recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred, installation has been completed (if applicable) or services have been rendered, fees are fixed or determinable and collectability is reasonably assured. For product sales, delivery is considered to have occurred when the risks and rewards of ownership transfer to the customer. For inventory maintained at the customer site, revenue is recognized at the time these products are sold by the customer. We base our estimates for returns on historical experience and have not experienced significant fluctuations between estimated and actual return activity. Non-income based taxes collected from customers are also recorded as revenue and include levies and various excise taxes, mainly in non-U.S. jurisdictions. These taxes included in revenue in 2014, 2013, and 2012 were $7.1 million, $10.3 million, and $13.8 million, respectively.
	The majority of the Company’s Storage and Security Solutions products have both software and non-software components that together deliver the products’ essential functionality. The software is embedded within the hardware and sold together as a single storage solution to the customer. Accordingly, the software and non-software components do not qualify as separate units of accounting as prescribed in Accounting Standards Codification (ASC) 605-25 and are combined as a single unit of accounting. There are no situations where revenue is recognized separately for software.
	We also offer services in conjunction with our Storage and Security Solutions products which may include installation, training, hardware maintenance and software support. For such services that are determined to be essential to the functionality of the product, such as certain installation services, the product and services do not qualify as separate units of accounting as prescribed in ASC 605-25 and are combined as a single unit of accounting. In situations where the sale of our Storage and Security Solutions products and associated services qualify as multiple element arrangements, we allocate arrangement consideration to each unit of accounting based on its relative selling price, and revenue is recognized for each element when all of the criteria for revenue recognition for such elements have been met. Revenue from services is not a significant component of total consolidated revenues.
	Revenue associated with stand-alone service arrangements (such as maintenance arrangements) that are sold separately is recorded ratably over the service period.
Rebates	Rebates that are provided to our customers are accounted for as a reduction of revenue at the time of sale based on an estimate of the cost to honor the related rebate programs. The rebate programs that we offer vary across our businesses as we serve numerous markets. The most common incentives relate to amounts paid or credited to customers that are volume-based and rebates to support promotional activities.
Concentrations of Credit Risk	We sell a wide range of products and services to a diversified base of customers around the world and perform ongoing credit evaluations of our customers’ financial condition. Therefore, we believe there is no material concentration of credit risk.
Cost of Goods Sold	Cost of goods sold includes raw materials, direct labor, manufacturing overhead, shipping and receiving costs, freight costs, depreciation of manufacturing equipment and other less significant indirect costs related to the production of our products.
Selling, General and Administrative (SG&A) Expenses	SG&A expenses include sales and marketing, customer service, finance, legal, human resources, information technology, general management and similar expenses.
Research and Development Costs	Research and development costs are expensed as incurred. Research and development costs include salaries, payroll taxes, employee benefit costs, supplies, depreciation and maintenance of research equipment.
Rebates Received	We receive rebates from some of our inventory vendors if we achieve pre-determined purchasing thresholds. These rebates are accounted for as a reduction of the price of the vendor's products and are included as a reduction of our cost of goods sold in the period in which the purchased inventory is sold.
Income Taxes	We are required to estimate our income taxes in each of the jurisdictions in which we operate. This process involves estimating our actual current tax obligations based on expected taxable income, statutory tax rates and tax credits allowed in the various jurisdictions in which we operate. Tax laws require certain items to be included in our tax returns at different times than the items are reflected in our results of operations. Some of these differences are permanent, such as expenses that are not deductible in our tax returns, and some are temporary differences that will reverse over time. Temporary differences result in deferred tax assets and liabilities, which are included in our Consolidated Balance Sheets. We must assess the likelihood that our deferred tax assets will be realized and establish a valuation allowance to the extent necessary.
	We record income taxes using the asset and liability approach. Under this approach, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the book and tax basis of assets and liabilities. We measure deferred tax assets and liabilities using the enacted statutory tax rates that are expected to apply in the years in which the temporary differences are expected to be recovered or paid.
	We regularly assess the likelihood that our deferred tax assets will be recovered in the future. In accordance with accounting rules, a valuation allowance is recorded to the extent we conclude a deferred tax asset is not considered to be more-likely-than-not to be realized. We consider all positive and negative evidence related to the realization of the deferred tax assets in assessing the need for a valuation allowance. If we determine it is more-likely-than-not that we will not realize all or part of our deferred tax assets, an adjustment to the deferred tax asset will be charged to earnings in the period such determination is made.
	Our income tax returns are subject to review by various U.S. and foreign taxing authorities. As such, we record accruals for items that we believe may be challenged by these taxing authorities. The threshold for recognizing the benefit of a tax return position in the financial statements is that the position must be more-likely-than-not to be sustained by the taxing authorities based solely on the technical merits of the position. If the recognition threshold is met, the tax benefit is measured and recognized as the largest amount of tax benefit that, in our judgment, is greater than 50 percent likely to be realized. Interest and penalties recorded for uncertain tax positions are included in our income tax provision.
Treasury Stock	Our repurchases of shares of common stock are recorded at cost as treasury stock and are presented as a reduction of shareholders’ equity. When treasury shares are reissued, we use a last-in, first-out method, and the difference between repurchase cost and fair value at reissuance is treated as an adjustment to equity.
Stock-Based Compensation	Stock-based compensation awards classified as equity awards are measured at fair value at the date of grant and expensed over their vesting or service periods. We also have stock appreciation rights outstanding which are considered liability awards as the settlement of these awards, if they were to vest, would be in cash. If these awards were determined to be probable of achieving its market and performance conditions, we would record the estimated fair value of such awards as a liability and remeasure their estimated value each reporting period.
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The assumptions used in the valuation model are supported primarily by historical indicators and current market conditions. Expected volatilities are based on historical volatility of our stock and are calculated using the historical weekly close rate for a period of time equal to the expected term. The risk-free rate for the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. We use historical data to estimate option exercise and employee termination activity within the valuation model. The expected term of stock options granted is based on historical data and represents the period of time that stock options granted are expected to be outstanding. It is calculated on an aggregated basis and estimated based on an analysis of options already exercised and any foreseeable trends or changes in recipients’ behavior. In determining the expected term, we consider the vesting period of the awards, the contractual term of the awards, historical average holding periods, stock price history, impacts from recent restructuring initiatives and the relative weight for each of these factors. The dividend yield, if applicable, is based on the latest dividend payments made on or announced by the date of the grant. Forfeitures are estimated based on historical experience and current demographics. See Note 8 - Stock-Based Compensation for further information regarding stock-based compensation.
Weighted Average Basic and Diluted Shares Outstanding	Basic (loss) earnings per common share is calculated using the weighted average number of shares outstanding during the year. Diluted (loss) earnings per common share is computed on the basis of the weighted average basic shares outstanding plus the dilutive effect of our stock-based compensation plans using the “treasury stock” method. Unvested restricted stock and treasury shares are excluded from the calculation of weighted average number of common shares outstanding. Once restricted stock vests, it is included in our common shares outstanding.
	Potential common shares are excluded from the computation of diluted (loss) earnings per common share when the effect would be anti-dilutive. All potential common shares are anti-dilutive in periods of net loss available to common shareholders. Stock options are also anti-dilutive when the exercise price of these instruments is greater than the average market price of the Company's common stock for the period. See Note 3 - (Loss) Earnings per Common Share for our calculation of weighted average basic and diluted shares outstanding.
Recent Accounting Pronouncements	In April 2014, the Financial Accounting Standards Board (FASB) issued new accounting guidance for reporting discontinued operations and disposals of components of an entity. The new guidance requires that a disposal representing a strategic shift, that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale, should be reported as discontinued operations. The new guidance also expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amendments are effective for interim and annual periods beginning on or after December 15, 2014. Early adoption is permitted but only for disposals that have not been reported in financial statements previously issued. This standard will not impact our historical financial position and results of operations, but we will apply this guidance to future dispositions, if any, that qualify for discontinued operations.
	In May 2014, the FASB issued new accounting guidance related to revenue recognition. This new guidance will replace all current U.S. GAAP guidance on revenue recognition and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The guidance is effective for interim and annual periods beginning on or after December 15, 2016 (early adoption is not permitted). The guidance permits the use of either a retrospective or cumulative effect transition method. We have not yet selected a transition method and are currently evaluating the impact of this new guidance on our financial position and results of operations.

Loss_Earnings_per_Common_Share1

(Loss) Earnings per Common Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of the weighted average basic and diluted loss per share:
		Years Ended December 31,
		2014			2013			2012
		(In millions, except per share amounts)
	Numerator:
	Loss from continuing operations	$	(112.4	)	$	(24.4	)	$	(324.8	)
	Loss from discontinued operations	(2.3		)	(20.0		)	(15.9		)
	Net loss	$	(114.7	)	$	(44.4	)	$	(340.7	)
	Denominator:
	Weighted average number of common shares outstanding during the period	41			40.5			37.5
	Dilutive effect of stock-based compensation plans	—			—			—
	Weighted average number of diluted shares outstanding during the period	41			40.5			37.5
	Basic loss per common share:
	Continuing operations	$	(2.74	)	$	(0.60	)	$	(8.67	)
	Discontinued operations	(0.06		)	(0.49		)	(0.42		)
	Net loss	(2.80		)	(1.10		)	(9.09		)
	Diluted loss per common share:
	Continuing operations	$	(2.74	)	$	(0.60	)	$	(8.67	)
	Discontinued operations	(0.06		)	(0.49		)	(0.42		)
	Net loss	(2.80		)	(1.10		)	(9.09		)
	Anti-dilutive shares excluded from calculation	4.5			6.1			6.3

Acquisitions_and_Divestitures_

Acquisitions and Divestitures (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Schedule of Allocation of Purchase Price to Assets Acquired and Liabilities Assumed	The following table illustrates our allocation of the purchase price to the assets acquired and liabilities assumed as of December 31, 2013:
		Amount
		(In millions)
	Cash	$	0.8
	Accounts receivable	14.6
	Inventory	6.9
	Prepaid and other	9
	Property, plant and equipment	5.2
	Intangible assets	42.6
	Goodwill	63.9
	Other assets	0.6
	Accounts payable	(5.3		)
	Accrued expenses	(10.0		)
	Deferred revenue - current	(4.3		)
	Deferred revenue - non-current	(2.5		)
	Other long-term liabilities	(3.0		)
		$	118.5
Schedule of Intangible Assets Acquired	Our allocation of the purchase price to the assets acquired and liabilities assumed resulted in the recognition of the following intangible assets:
					Weighted
					Average
		Amount			Life
		(In millions)
	Trade names	$	3.1		5 years
	Other - developed technology	19.4			3-7 years
	Other - research and development technology	1.7			NA
	Customer relationships	18.4			12 years
		$	42.6
Schedule of Unaudited Supplemental Proforma Information	The following unaudited supplemental pro forma information is provided for illustrative purposes only, giving effect to the combination as if the acquisition of Nexsan had occurred on January 1, 2012 and should not be relied upon as being indicative of the historical results that would have been obtained if the acquisition had actually occurred on that date, nor of the results that may be obtained in the future.
		Pro Forma Year End
		31-Dec
		(Unaudited)
		2012
		(In millions)
	Net revenue	$	1,088.70
	Loss from continuing operations	$	(328.5	)
Schedule of Key Components of Discontinued Operations	The key components of the results of discontinued operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net revenue	$	0.4		$	40.7		$	92.9
	(Loss) gain on sale of discontinued businesses, net of income taxes	$	(1.7	)	$	0.9		$	—
	Loss from operations of discontinued businesses, before income taxes	(0.6		)	(14.2		)	(17.7		)
	Adjustment to carrying value of disposal group	—			(6.7		)	—
	Income tax benefit	—			—			(1.8		)
	Loss from discontinued businesses, net of income taxes	$	(2.3	)	$	(20.0	)	$	(15.9	)

Supplemental_Balance_Sheet_Inf1

Supplemental Balance Sheet Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Balance Sheet Information [Abstract]
Supplemental Balance Sheet Disclosures	Additional supplemental balance sheet information is provided in the tables that follow.
		As of December 31,
		2014			2013
		(In millions)
	Inventories
	Finished goods	$	51.1		$	76.3
	Work in process	0.7			2.9
	Raw materials and supplies	5.9			5.1
	Total inventories	$	57.7		$	84.3
	Property, Plant and Equipment
	Land	$	1.2		$	1.2
	Buildings and leasehold improvements	94.7			95.4
	Machinery and equipment	88			104
	Construction in progress	0.1			1.1
	Total	184			201.7
	Less accumulated depreciation	(139.0		)	(150.1		)
	Property, plant and equipment, net	$	45		$	51.6
Schedule of Accounts Receivable Reserves and Allowances
		Accounts Receivable*
		(In millions)
	Reserves and Allowances
	Balance, as of December 31, 2011	$	18.4
	Additions	10.3
	Write-offs, net of recoveries	(10.7		)
	Balance, as of December 31, 2012	$	18
	Additions	6.6
	Write-offs, net of recoveries	(10.1		)
	Balance, as of December 31, 2013	$	14.5
	Additions	2.9
	Write-offs, net of recoveries	(8.3		)
	Balance, as of December 31, 2014	$	9.1
	*Accounts receivable reserves and allowances include estimated amounts for customer returns, discounts on payment terms and the inability of certain customers to make the required payment.

Intangible_Assets_and_Goodwill1

Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	Intangible assets consist of the following:
		Trade Names			Software			Customer Relationships			Other			Total
		(In millions)
	December 31, 2014
	Cost	$	34.2		$	60.1		$	20		$	26.2		$	140.5
	Accumulated amortization	(14.0		)	(55.3		)	(3.7		)	(9.6		)	(82.6		)
	Intangible assets, net	$	20.2		$	4.8		$	16.3		$	16.6		$	57.9
	December 31, 2013
	Cost	$	34.3		$	58.5		$	20.4		$	26.3		$	139.5
	Accumulated amortization	(9.2		)	(53.3		)	(2.1		)	(6.3		)	(70.9		)
	Intangible assets, net	$	25.1		$	5.2		$	18.3		$	20		$	68.6
Schedule of Intangible Asset Amortization Expense	Amortization expense from continuing operations for intangible assets consisted of the following:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Amortization expense	$	12.9		$	13.2		$	23.9
Schedule of Expected Amortization Expense	Based on the intangible assets in service as of December 31, 2014, estimated amortization expense for each of the next five years ending December 31 is as follows:
		2015			2016			2017			2018			2019
		(In millions)
	Amortization expense	$	12.1		$	9.9		$	8.7		$	6.6		$	6.2
Schedule of Goodwill	The following table presents the changes in goodwill allocated to our reportable segments:
		TSS			CSA			Total
		(In millions)
	Balance as of December 31, 2012:
	Goodwill	$	201.3		$	49.4		$	250.7
	Accumulated impairment losses	(127.8		)	(49.4		)	(177.2		)
		73.5			—			73.5
	Nexsan purchase price adjustment	(1.6		)	—			(1.6		)
	Foreign currency translation	0.2			—			0.2
	Balance as of December 31, 2013:
	Goodwill	199.9			49.4			249.3
	Accumulated impairment losses	(127.8		)	(49.4		)	(177.2		)
		72.1			—			72.1
	Goodwill impairment	(35.4		)	—			(35.4		)
	Foreign currency translation	(0.6		)	—			(0.6		)
	Balance as of December 31, 2014:
	Goodwill	199.3			49.4			248.7
	Accumulated impairment losses	(163.2		)	(49.4		)	(212.6		)
		$	36.1		$	—		$	36.1

Restructuring_and_Other_Expens1

Restructuring and Other Expense (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Other Expenses	The components of our restructuring and other expense included in our Consolidated Statements of Operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Restructuring
	Severance and related	$	3.9		$	2.1		$	16.9
	Lease termination costs	0.3			0.7			0.6
	Other	1.2			2.4			2.2
	Total restructuring	$	5.4		$	5.2		$	19.7
	Other
	Settlement of UK pension plan (Note 9)	0.5			10.6			—
	Gain on sale of fixed assets held for sale	—			(9.8		)	(0.7		)
	Acquisition and integration related costs	—			2.8			3.7
	Pension settlement/curtailment (Note 9)	0.2			2.1			2.4
	Contingent consideration fair value adjustment (Note 4)	—			(0.6		)	(8.6		)
	Intangible asset abandonment (Note 6)	—			—			1.9
	Asset disposals / write down	1.8			—			—
	Other	5.7			1			2.7
	Total	$	13.6		$	11.3		$	21.1
Schedule of Restructuring Reserves	Activity related to the 2012 GPI Program accruals was as follows:
		Severance and Related			Lease Termination Costs			Other			Total
		(In millions)
	Accrued balance at December 31, 2012	$	13.8		$	0.1		$	0.8		$	14.7
	Transfer from 2011 Corporate Program	1.6			0.4			0.2			2.2
	Charges	3.7			0.7			2.4			6.8
	Usage	(16.9		)	(0.7		)	(2.5		)	(20.1		)
	Currency impacts	—			(0.1		)	(0.1		)	(0.2		)
	Accrued balance at December 31, 2013	$	2.2		$	0.4		$	0.8		$	3.4
	Charges	3.7			0.1			0.6			4.4
	Usage	(5.1		)	(0.2		)	(1.4		)	(6.7		)
	Currency impacts	—			—			0.2			0.2
	Accrued balance at December 31, 2014	$	0.8		$	0.3		$	0.2		$	1.3

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Compensation	Stock compensation consisted of the following:
		Years Ended December 31,
		2014			2013				2012
		(In millions)
	Stock compensation expense	$	5.3		$	6.3			$	6.6
Schedule of Weighted Average Assumptions Used in the Valuation of Options	The following table summarizes our weighted average assumptions used in the valuation of options for the years ended December 31:
		2014		2013			2012
	Volatility	46	%	43	%		45	%
	Risk-free interest rate	1.93	%	1.05	%		1.07	%
	Expected life (months)	73		72			71
	Dividend yield	—	%	—	%		—	%
Schedule of Stock Option Activity	The following table summarizes our stock option activity:
		Stock Options		Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
										(millions)
	Outstanding December 31, 2011	5,679,579		$	19.87			6		$	—
	Granted	1,178,780		5.8
	Exercised	—		—
	Canceled	(752,415	)	26.61
	Forfeited	(287,472	)	9.24
	Outstanding December 31, 2012	5,818,472		$	16.57			5.9		$	—
	Granted	1,034,406		3.85
	Exercised	—		—
	Canceled	(1,069,192	)	25.22
	Forfeited	(412,148	)	7.13
	Outstanding December 31, 2013	5,371,538		$	13.11			6.1		$	0.8
	Granted	61,275		3.72
	Exercised	(87,569	)	3.97
	Canceled	(881,069	)	19.05
	Forfeited	(566,189	)	4.14
	Outstanding December 31, 2014	3,897,986		$	13.07			4.8		$	—
Schedule of Options Exercisable and Expected to Vest	The following table summarizes exercisable options and options expected to vest as of December 31, 2014:
		Exercisable Options								Options Expected to Vest
				Weighted		Weighted						Weighted	Weighted
				Average		Average						Average	Average
				Remaining								Remaining
	Range of Exercise	Stock		Contractual		Exercise				Stock		Contractual	Exercise
	Prices	Options		Life (Years)		Price				Options		Life (Years)	Price
	$3.48 to $6.16	618,973		6.6		$	5.32			481,243		8	$	4.61
	$6.17 to $9.64	475,772		4.4		8.66				4,094		7.1	6.19
	$9.65 to $19.20	1,417,382		4.8		10.06				3,062		6.2	11.31
	$19.21 to $23.95	9,500		3		20.2				—		0	—
	$23.96 to $28.70	403,837		2.4		24.62				—		0	—
	$28.71 to $39.38	323,487		1.1		35.97				—		0	—
	$39.39 to $41.75	118,900		1.2		41.62				—		0	—
	$41.76 to $46.97	2,500		1.4		45.76				—		0	—
	$3.48 to $46.97	3,370,351		4.3		$	14.39			488,399		8	$	4.67
Schedule of Restricted Stock Activity	The following table summarizes our restricted stock activity:
		Restricted Stock		Weighted Average Grant Date Fair Value Per Share
	Nonvested as of December 31, 2011	795,046		$	10.02
	Granted	708,573		5.67
	Vested	(321,103	)	10.3
	Forfeited	(156,712	)	8.72
	Nonvested as of December 31, 2012	1,025,804		$	7.12
	Granted	837,443		3.75
	Vested	(561,099	)	6.99
	Forfeited	(109,827	)	6.59
	Nonvested as of December 31, 2013	1,192,321		$	4.87
	Granted	1,229,249		3.65
	Vested	(734,533	)	5.19
	Forfeited	(338,120	)	3.95
	Nonvested as of December 31, 2014	1,348,917		$	3.81

Retirement_Plans_Tables

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Schedule of Changes in Projected Benefit Obligation and Plan Assets, and Net Funded Status	The benefit obligations and plan assets, changes to the benefit obligations and plan assets, and the funded status of the defined benefit pension plans were as follows:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Change in benefit obligation
	Benefit obligation, beginning of year	$	78.5			$	88.3			$	31.4		$	63.4
	Service cost	—				—				0.3			0.5
	Interest cost	3.3				3.3				0.9			2
	Actuarial (gain) loss	4.4				(1.7		)		6.5			(4.7		)
	Benefits paid	(1.8		)		(2.0		)		(1.6		)	(3.5		)
	Settlements	(5.6		)		(9.4		)		—			(24.8		)
	Foreign exchange rate changes	—				—				(4.3		)	(1.5		)
	Projected benefit obligation, end of year	$	78.8			$	78.5			$	33.2		$	31.4
	Change in plan assets
	Fair value of plan assets, beginning of year	$	71			$	71.7			$	26.1		$	58
	Actual return on plan assets	2.5				10.7				1.6			(3.3		)
	Foreign exchange rate changes	—				—				(3.2		)	(1.8		)
	Company contributions	1.4				—				0.7			1.5
	Benefits paid	(1.8		)		(2.0		)		(1.6		)	(3.5		)
	Settlement payments	(5.6		)		(9.4		)		—			(24.8		)
	Fair value of plan assets, end of year	67.5				71				23.6			26.1
	Funded status of the plan, end of year	$	(11.3	)		$	(7.5	)		$	(9.6	)	$	(5.3	)
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in our Consolidated Balance Sheets consisted of the following:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Noncurrent assets	$	—			$	—			$	1.6		$	—
	Noncurrent liabilities	(11.3		)		(7.5		)		(11.2		)	(5.3		)
	Accumulated other comprehensive loss — pre-tax	19				14.3				10.4			4.6
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Pre-tax amounts recognized in accumulated other comprehensive loss consisted of the following:
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Net actuarial loss	$	19			$	14.3			$	12.1		$	7.6
	Prior service credit	—				—				(2.2		)	(4.0		)
	Transition asset obligation	—				—				0.5			1
	Total	$	19			$	14.3			$	10.4		$	4.6
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	The following table includes information for pension plans with an accumulated benefit obligation in excess of plan assets. The balances presented as of December 31, 2014 and 2013 exclude our Japan plan which had plan assets in excess of accumulated benefit obligation for both years.
		United States								International
		As of December 31,								As of December 31,
		2014				2013				2014			2013
		(In millions)
	Projected benefit obligation, end of year	$	78.8			$	78.5			$	28.7		$	25.7
	Accumulated benefit obligation, end of year	78.8				78.5				28.7			25.7
	Plan assets at fair value, end of year	67.5				71				17.6			19.7
Schedule of Net Benefit Costs	Components of net periodic pension cost included the following:
		United States											International
		Years Ended December 31,											Years Ended December 31,
		2014				2013				2012			2014				2013			2012
		(In millions)
	Service cost	$	—			$	—			$	—		$	0.3			$	0.5		$	0.6
	Interest cost	3.3				3.3				3.2			0.9				2			2.2
	Expected return on plan assets	(4.8		)		(5.1		)		(5.7		)	(0.8		)		(2.5		)	(2.3		)
	Amortization of net actuarial loss	1.1				1.9				1.5			0.2				0.5			0.3
	Amortization of prior service credit	—				—				—			(0.3		)		(0.4		)	(0.5		)
	Amortization of transition obligation	—				—				—			0.1				0.3			0.3
	Net periodic pension cost (credit)	(0.4		)		0.1				(1.0		)	0.4				0.4			0.6
	Settlements and curtailments	1.1				2.1				2.4			(0.9		)		—			—
	Total pension cost	$	0.7			$	2.2			$	1.4		$	(0.5	)		$	0.4		$	0.6
Schedule of Assumptions Used	Assumptions used to determine benefit obligations were as follows (international assumptions are a weighted average of all of our international plans):
		United States						International
		As of December 31,						As of December 31,
		2014			2013			2014			2013
	Discount rate	4	%		4.5	%		1.89	%		3.2	%
	Rate of compensation increase	—	%		—	%		2.92	%		2.89	%
	Assumptions used to determine net periodic benefit costs were as follows (international assumptions are a weighted average of all of our international plans):
		United States									International
		As of December 31,									As of December 31,
		2014			2013			2012			2014		2013			2012
	Discount rate (1)	4.25	%		4	%		3.75	%		3.27	%	2.7	%		4.09	%
	Expected return on plan assets	7.75	%		7.75	%		8	%		3.35	%	4.53	%		4.32	%
	Rate of compensation increase	—	%		—	%		—	%		2.86	%	2	%		2.57	%
	(1) The discount rate of 4.25 percent used to determine the 2014 net periodic benefit cost for the U.S. plan is an average of the discount rates used during the year of 4.50 percent for the first six months of the year and 4.00 percent for the last six months of the year.
Schedule of Allocation of Plan Assets	The plans' asset allocations by asset category were as follows:
		United States						International
		As of December 31,						As of December 31,
		2014			2013			2014			2013
	Short-term investments	1	%		1	%		1	%		1	%
	Fixed income securities	23	%		18	%		24	%		23	%
	Equity securities	57	%		63	%		—	%		—	%
	Absolute return strategy equity funds	19	%		18	%		—	%		—	%
	Insurance contracts	—	%		—	%		75	%		76	%
	Total	100	%		100	%		100	%		100	%
Schedule of Expected Benefit Payments	As of December 31, 2014, the following reflects future benefit payments services expected to be paid, by the plans, in each of the next five years and in the aggregate for the five years thereafter:
		United States		International
		(In millions)
	2015	$15.70		$1.10
	2016	5		1.2
	2017	4.6		1.2
	2018	4.6		1.2
	2019	4.7		1.2
	2020-2024	25.5		7
Schedule of Fair Value of Plan Assets	The fair value of the plan assets by asset category were as follows:
	United States	December 31, 2014				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
						(Level 1)				(Level 2)			(Level 3)
		(In millions)
	Short-term investments
	Money market securities	$	0.4			$	0.4			$	—		$	—
	Mutual Funds
	Equity securities
	Large-cap growth funds	14.6				—				14.6			—
	International growth fund	10.8				7.3				3.5			—
	Fixed income securities	15.5				15.5				—			—
	Absolute return strategy funds	13.2				—				13.2			—
	Common stocks	7.3				7.3				—			—
	Commingled trust funds	5.7				—				5.7			—
	Total	$	67.5			$	30.5			$	37		$	—
	International	December 31, 2014				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
						(Level 1)				(Level 2)			(Level 3)
		(In millions)
	Short-term investments
	Other	$	0.3			$	—			$	0.3		$	—
	Mutual Funds
	Fixed income securities	5.7				—				5.7			—
	Insurance contracts	17.6				—				17.6			—
	Total	$	23.6			$	—			$	23.6		$	—
	United States	December 31, 2013				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
						(Level 1)				(Level 2)			(Level 3)
		(In millions)
	Short-term investments
	Money market securities	$	0.5			$	0.5			$	—		$	—
	Mutual Funds
	Equity securities
	Large-cap growth funds	16.1				—				16.1			—
	International growth fund	11.1				7.5				3.6			—
	Fixed income securities	13				13				—			—
	Absolute return strategy funds	12.8				—				12.8			—
	Common stocks	8.3				8.3				—			—
	Commingled trust funds	9.2				—				9.2			—
	Total	$	71			$	29.3			$	41.7		$	—
	International	December 31, 2013				Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs			Unobservable Inputs
						(Level 1)				(Level 2)			(Level 3)
		(In millions)
	Short-term investments
	Other	$	0.3			$	—			$	0.3		$	—
	Mutual Funds
	Equity securities - blended funds	—				—				—			—
	Fixed income securities	6.1				—				6.1			—
	Insurance contracts	19.7				—				19.7			—
	Total	$	26.1			$	—			$	26.1		$	—

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Loss from Continuing Operations before Income Taxes	The components of loss from continuing operations before income taxes were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	U.S.	$	(95.3	)	$	(25.2	)	$	(266.1	)
	International	(14.0		)	2.2			(57.3		)
	Total	$	(109.3	)	$	(23.0	)	$	(323.4	)
Schedule of Components of Income Tax Expense (Benefit)	The components of the income tax provision from continuing operations were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Current
	Federal	$	0.5		$	(0.7	)	$	(11.5	)
	State	(0.5		)	—			—
	International	(0.1		)	5.9			6.3
	Deferred
	Federal	1.7			—			8.8
	State	—			—			—
	International	1.5			(3.8		)	(2.2		)
	Total	$	3.1		$	1.4		$	1.4
Schedule of Income Tax Rate Reconciliation	The income tax provision from continuing operations differs from the amount computed by applying the statutory United States income tax rate (35 percent) because of the following items:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Tax at statutory U.S. tax rate	$	(38.3	)	$	(8.1	)	$	(113.2	)
	State income taxes, net of federal benefit	(3.2		)	(0.2		)	(6.3		)
	Net effect of international operations	1.1			3.1			25
	Settlement of UK pension plan	—			(2.3		)	—
	Valuation allowances	22.9			(3.2		)	89.2
	Tax on unremitted earnings of foreign subsidiaries	15.9			—			—
	U.S. tax on foreign earnings	4.7			6.2			3.9
	Stock-based compensation	2.1			3.1			2.4
	Uncertain tax positions	(1.2		)	2.2			0.3
	Goodwill impairment	10.7			—			—
	Capital losses	(11.4		)	—			—
	Other	(0.2		)	0.6			0.1
	Income tax provision	$	3.1		$	1.4		$	1.4
Schedule of Deferred Tax Assets and Liabilities	The components of net deferred tax assets and liabilities were as follows:
		As of December 31,
		2014			2013
		(In millions)
	Accounts receivable allowances	$	1.6		$	3
	Inventories	7.6			9.1
	Compensation and employee benefits	6.6			8
	Tax credit carryforwards	33.9			35.8
	Net operating loss carryforwards	149.4			115.2
	Accrued liabilities and other reserves	7			9
	Pension	9			6
	Property, plant and equipment	10.2			8.9
	Intangible assets, net	49.6			55.3
	Capital losses	11.5			—
	Other, net	0.7			1.8
	Total deferred tax assets	287.1			252.1
	Valuation allowance	(262.4		)	(239.4		)
	Net deferred tax assets	24.7			12.7
	Unremitted earnings of foreign subsidiaries	(15.7		)	—
	Property, plant and equipment	—			—
	Total deferred tax liabilities	(15.7		)	—
	Net deferred tax assets	$	9		$	12.7
Components of Deferred Tax Balances	The table below shows the components of our deferred tax balances after the results of that netting process as they are recorded on our Consolidated Balance Sheets:
		As of December 31
		2014			2013
		(In millions)
	Deferred tax asset - current	3.2			4.6
	Deferred tax asset - non-current	8.1			9.5
	Deferred tax liability - current	—			(0.4		)
	Deferred tax liability - non-current	(2.3		)	(1.0		)
	Total	$	9		$	12.7
Schedule of Unrecognized Tax Benefits Reconciliation	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2014			2013			2012
		(In Millions)
	Beginning Balance	$	5.3		$	4.4		$	15.1
	Additions:
	Additions for tax positions of current years	0.3			0.3			0.3
	Additions for tax positions of prior years	0.1			1.1			0.6
	Reductions:
	Reductions for tax positions of prior years	(1.9		)	(0.4		)	(11.3		)
	Settlements with taxing authorities	(1.3		)	—			(0.2		)
	Reductions due to lapse of statute of limitations	(0.4		)	(0.1		)	(0.1		)
	Total	2.1			5.3			4.4

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Cash Flow Hedges Measured at Fair Value on Recurring Basis	The following table sets forth our cash flow hedges which are measured at fair value on a recurring basis.
		December 31, 2014						December 31, 2013
		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Unobservable		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs (Level 2)			Unobservable
		(Level 1)		(Level 2)		Inputs		(Level 1)					Inputs
						(Level 3)							(Level 3)
		(In millions)
	Derivative assets
	Foreign currency option contracts	$	—	$	—	$	—	$	—	$	1.8		$	—
	Foreign currency forward contracts	—		7.3		—		—		3.3			—
	Derivative liabilities
	Foreign currency option contracts	—		—		—		—		(0.2		)	—
	Foreign currency forward contracts	—		—		—		—		(0.5		)	—
	Total	$	—	$	7.3	$	—	$	—	$	4.4		$	—
Schedule of Derivative Instruments	The notional amounts and fair values of our derivative instruments recorded in other current assets and other current liabilities in our Consolidated Financial Statements were as follows:
		December 31, 2014						December 31, 2013
				Fair Value						Fair Value
		Notional Amount		Other Current Assets		Other Current Liabilities		Notional Amount		Other Current Assets			Other Current Liabilities
		(In millions)
	Cash flow hedges designated as hedging instruments	$	86.7	$	7.3	$	—	$	133.8	$	5.1		$	(0.7	)
	Other hedges not receiving hedge accounting	23.4		—		—		29.4		—			—
	Total	$	110.1	$	7.3	$	—	$	163.2	$	5.1		$	(0.7	)

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Treasury Stock	The following is a summary of treasury share activity:
		Treasury Shares
	Balance as of December 31, 2011	4,663,923
	Purchases	1,236,161
	Exercise of stock options	—
	Restricted stock grants and other	(499,851	)
	401(k) matching contribution	(517,588	)
	Shares issued for acquisition	(3,319,324	)
	Balance as of December 31, 2012	1,563,321
	Purchases	616,581
	Exercise of stock options	—
	Restricted stock grants and other	(622,241	)
	401(k) matching contribution	(435,735	)
	Balance as of December 31, 2013	1,121,926
	Purchases	760,268
	Exercise of stock options	(87,569	)
	Restricted stock grants and other	(739,408	)
	401(k) matching contribution	(427,421	)
	Balance as of December 31, 2014	627,796
Schedule of Accumulated Other Comprehensive Loss	Accumulated other comprehensive loss and related activity consisted of the following:
		Gains (Losses) on Derivative Financial Instruments			Defined Benefit Plans			Foreign Currency Translation			Total
		(In millions)
	Balance as of December 31, 2013	$	2.4		$	(11.6	)	$	(53.6	)	$	(62.8	)
	Other comprehensive (loss) income before reclassifications, net of tax (1)	6.1			(10.4		)	(15.7		)	(20.0		)
	Amounts reclassified from accumulated other comprehensive loss, net of tax	(3.4		)	1.4			—			(2.0		)
	Net current period other comprehensive income (loss)	2.7			(9.0		)	(15.7		)	(22.0		)
	Balance as of December 31, 2014	$	5.1		$	(20.6	)	$	(69.3	)	$	(84.8	)
	(1) Income tax expense of $3.1 million was recorded for unrealized gains on derivative financial instruments and income tax benefit of $1.7 million for liability adjustments for defined benefit plans for the year ended December 31, 2014.
Reclassification Out of Accumulated Other Comprehensive Income	Details of amounts reclassified from Accumulated other comprehensive loss and the line item in our Consolidated Statement of Operations for the year ended December 31, 2014 are as follows:
		Amounts Reclassified from Accumulated Other Comprehensive Loss			Affected Line Item in the Statement Where Net Loss is Presented
		(In millions)
	(Gains) losses on cash flow hedges	$	(5.5	)	Cost of goods sold
	Income tax expense	2.1			Income tax (benefit) provision
	Net (gains) losses on cash flow hedges	(3.4		)
	Amortization of net actuarial loss	0.2			Selling, general and administrative
	Pension settlement loss	1			Restructuring and other
	Income tax expense	0.2			Income tax (benefit) provision
	Net pension adjustments, net of tax	1.4
	Total reclassifications for the period	$	(2.0	)

Business_Segment_Information_a1

Business Segment Information and Geographic Data (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Net Revenue and Operating Income (Loss) by Segment	Net revenue and operating income (loss) by segment were as follows:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net Revenue
	Consumer Storage and Accessories
	Consumer Storage Media	$	342.9		$	435.7		$	594.3
	Audio and Accessories	50.6			42.6			41
	Total Consumer Storage and Accessories	393.5			478.3			635.3
	Tiered Storage and Security Solutions
	Commercial Storage Media	213.4			251			311.6
	Storage and Security Solutions	122.6			131.5			59.8
	Total Tiered Storage and Security Solutions	336			382.5			371.4
	Total Net Revenue	$	729.5		$	860.8		$	1,006.70
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Operating Income (Loss)
	Consumer Storage and Accessories	$	19.3		$	52.3		$	61.5
	Tiered Storage and Security Solutions	(32.0		)	(16.1		)	(26.7		)
	Total segment operating income (loss)	(12.7		)	36.2			34.8
	Corporate and unallocated	(91.4		)	(56.3		)	(353.2		)
	Total operating loss	(104.1		)	(20.1		)	(318.4		)
	Interest income	(0.5		)	(0.2		)	(0.5		)
	Interest expense	2.6			2.5			2.9
	Other expense, net	3.1			0.6			2.6
	Loss from continuing operations before income taxes	$	(109.3	)	$	(23.0	)	$	(323.4	)
Schedule of Net Revenue by Geographical Region	The following table presents net revenue by geographical region based on the country in which the revenue originated:
		Years Ended December 31,
		2014			2013			2012
		(In millions)
	Net Revenue
	United States	$	253.6		$	348.1		$	376.2
	International	475.9			512.7			630.5
	Total	$	729.5		$	860.8		$	1,006.70
Schedule of Long-Lived Assets by Geographical Region	The following table presents long-lived assets by geographical region:
		As of December 31,
		2014			2013			2012
		(In millions)
	Long-Lived Assets
	United States	$	121.6		$	150.7		$	166.9
	International	17.4			41.6			47.4
	Total	$	139		$	192.3		$	214.3

Litigation_Commitments_and_Con1

Litigation, Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of Rent Expense	The following table sets forth the components of net rent expense for the years ended December 31:
		2014			2013			2012
		(In millions)
	Minimum lease payments	$	7.8		$	8.5		$	6.1
	Contingent rentals	1.6			3.8			6.1
	Rental income	(8.6		)	(8.4		)	(3.4		)
	Sublease income	—			(0.5		)	(0.7		)
	Total rental expense, net	$	0.8		$	3.4		$	8.1
Schedule of Future Minimum Rental Payments for Operating Leases	The following table sets forth the minimum rental payments under operating leases with non-cancelable terms in excess of one year as of December 31, 2014:
		2015			2016			2017			2018		2019		Thereafter		Total
		(In millions)
	Minimum lease payments	$	5		$	3.7		$	2.9		$	1.6	$	0.6	$	1.4	$	15.2

Quarterly_Data_Unaudited_Table

Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information
		First			Second			Third			Fourth			Total(1)
		(In millions, except per share amounts)
	2013
	Net revenue	$	224.4		$	211.7		$	191.9		$	232.8		$	860.8
	Gross profit	42.1			55.2			36.1			55.3			188.7
	Operating (loss) income	(14.7		)	—			(26.5		)	21.1			(20.1		)
	(Loss) income from continuing operations	(15.6		)	(1.8		)	(26.2		)	19.2			(24.4		)
	Loss from discontinued operations	(5.5		)	(3.3		)	(8.7		)	(2.5		)	(20.0		)
	Net (loss) income	(21.1		)	(5.1		)	(34.9		)	16.7			(44.4		)
	(Loss) earnings per common share, continuing operations:
	Basic	$	(0.39	)	$	(0.04	)	$	(0.65	)	$	0.47		$	(0.60	)
	Diluted	(0.39		)	(0.04		)	(0.65		)	0.47			(0.60		)
	Loss per common share, discontinued operations:
	Basic	(0.14		)	(0.08		)	(0.21		)	(0.06		)	(0.49		)
	Diluted	(0.14		)	(0.08		)	(0.21		)	(0.06		)	(0.49		)
	(Loss) earnings per common share, net income:
	Basic	(0.52		)	(0.13		)	(0.86		)	0.41			(1.10		)
	Diluted	(0.52		)	(0.13		)	(0.86		)	0.41			(1.10		)
	2014
	Net revenue	$	178.9		$	178.6		$	175		$	197		$	729.5
	Gross profit	33.7			33.9			31.2			39.6			138.4
	Operating loss	(16.1		)	(20.1		)	(55.8		)	(12.1		)	(104.1		)
	Loss from continuing operations	(16.8		)	(19.8		)	(61.4		)	(14.4		)	(112.4		)
	Loss from discontinued operations	(0.7		)	(1.6		)	—			—			(2.3		)
	Net loss	(17.5		)	(21.4		)	(61.4		)	(14.4		)	(114.7		)
	Loss per common share, continuing operations:
	Basic	$	(0.41	)	$	(0.48	)	$	(1.49	)	$	(0.35	)	$	(2.74	)
	Diluted	(0.41		)	(0.48		)	(1.49		)	(0.35		)	(2.74		)
	Loss per common share, discontinued operations:
	Basic	(0.02		)	(0.04		)	—			—			(0.06		)
	Diluted	(0.02		)	(0.04		)	—			—			(0.06		)
	Loss per common share, net income:
	Basic	(0.43		)	(0.52		)	(1.49		)	(0.35		)	(2.80		)
	Diluted	(0.43		)	(0.52		)	(1.49		)	(0.35		)	(2.80		)
	_______________________________________
	(1)	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Background_and_Basis_of_Presen1

Background and Basis of Presentation - Narrative (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
	product_category	product
		segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	2	2
Number of major product categories	2	4
Number of reporting segments	2	2

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Line Items]
Restricted cash	$2,200,000	$0
Depreciation	8,800,000	9,400,000	7,500,000
Non-income based taxes included in revenue	$7,100,000	$10,300,000	$13,800,000
Building | Minimum
Accounting Policies [Line Items]
Useful lives	10 years
Building | Maximum
Accounting Policies [Line Items]
Useful lives	20 years
Machinery and equipment | Minimum
Accounting Policies [Line Items]
Useful lives	5 years
Machinery and equipment | Maximum
Accounting Policies [Line Items]
Useful lives	10 years

Loss_Earnings_per_Common_Share2

(Loss) Earnings per Common Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Numerator:
Loss from continuing operations	($14.40)	($61.40)	($19.80)	($16.80)	$19.20	($26.20)	($1.80)	($15.60)	($112.40)	[1]	($24.40)	[1]	($324.80)
Loss from discontinued operations	0	0	-1.6	-0.7	-2.5	-8.7	-3.3	-5.5	-2.3	[1]	-20	[1]	-15.9
Net loss	($14.40)	($61.40)	($21.40)	($17.50)	$16.70	($34.90)	($5.10)	($21.10)	($114.70)	[1]	($44.40)	[1]	($340.70)
Denominator:
Weighted average number of common shares outstanding during the period (in shares)									41		40.5		37.5
Dilutive effect of stock-based compensation plans (in shares)									0		0		0
Weighted average number of diluted shares outstanding during the period (in shares)									41		40.5		37.5
Basic loss per common share:
Continuing operations (dollars per share)	($0.35)	($1.49)	($0.48)	($0.41)	$0.47	($0.65)	($0.04)	($0.39)	($2.74)	[1]	($0.60)	[1]	($8.67)
Discontinued operations (dollars per share)	$0	$0	($0.04)	($0.02)	($0.06)	($0.21)	($0.08)	($0.14)	($0.06)	[1]	($0.49)	[1]	($0.42)
Net loss (dollars per share)	($0.35)	($1.49)	($0.52)	($0.43)	$0.41	($0.86)	($0.13)	($0.52)	($2.80)	[1]	($1.10)	[1]	($9.09)
Diluted (loss) earnings per common share:
Continuing operations (dollars per share)	($0.35)	($1.49)	($0.48)	($0.41)	$0.47	($0.65)	($0.04)	($0.39)	($2.74)	[1]	($0.60)	[1]	($8.67)
Discontinued operations (dollars per share)	$0	$0	($0.04)	($0.02)	($0.06)	($0.21)	($0.08)	($0.14)	($0.06)	[1]	($0.49)	[1]	($0.42)
Net loss (dollars per share)	($0.35)	($1.49)	($0.52)	($0.43)	$0.41	($0.86)	($0.13)	($0.52)	($2.80)	[1]	($1.10)	[1]	($9.09)
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from calculation (in shares)									4.5		6.1		6.3
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Acquisitions_and_Divestitures_1

Acquisitions and Divestitures - Acquisitions (Details) (USD $)	0 Months Ended	12 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2014
Business Acquisition [Line Items]
Common stock paid to acquired entity, shares			3,319,324
Nexsan purchase price adjustment		$1,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	73,500,000	72,100,000	73,500,000	73,500,000	36,100,000
Earnings contributed to the Company since date of acquisition	0
Revenue contributed to the Company since date of acquisition	0
Nexsan Corporation
Business Acquisition [Line Items]
Cash paid to acquired entity	104,600,000
Common stock paid to acquired entity, shares	3,319,324
Common stock paid to acquired entity, value	15,500,000
Nexsan purchase price adjustment		1,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash		800,000
Accounts receivable		14,600,000
Inventory		6,900,000
Prepaid and other		9,000,000
Property, plant, and equipment		5,200,000
Intangible assets		42,600,000
Goodwill	65,500,000	63,900,000	65,500,000	65,500,000
Other assets		600,000
Accounts payable		-5,300,000
Accrued expenses		-10,000,000
Deferred revenue - current		-4,300,000
Deferred revenue - non-current		-2,500,000
Other long-term liabilities		-3,000,000
Total purchase price		118,500,000
Acquired finite-lived intangible assets				42,600,000
Net revenue			1,088,700,000
Loss from continuing operations			-328,500,000
Nexsan Corporation | Other - research and development technology
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired indefinite-lived intangible assets				1,700,000
Nexsan Corporation | Trade name
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired finite-lived intangible assets				3,100,000
Acquired finite-lived intangible assets, weighted average life		5 years
Nexsan Corporation | Other - developed technology
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired finite-lived intangible assets				19,400,000
Nexsan Corporation | Other - developed technology | Minimum
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired finite-lived intangible assets, weighted average life		3 years
Nexsan Corporation | Other - developed technology | Maximum
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired finite-lived intangible assets, weighted average life		7 years
Nexsan Corporation | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Acquired finite-lived intangible assets				18,400,000
Acquired finite-lived intangible assets, weighted average life		12 years
Finite-Lived Intangible Assets | Nexsan Corporation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Pro Forma Information, Adjustment		5,100,000
Deferred Revenue | Nexsan Corporation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Pro Forma Information, Adjustment		600,000
Variable Compensation Expense | Nexsan Corporation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Pro Forma Information, Adjustment		15,400,000
Interest Expense | Nexsan Corporation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Pro Forma Information, Adjustment		900,000
Transaction Cost | Nexsan Corporation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Pro Forma Information, Adjustment		$4,300,000

Acquisitions_and_Divestitures_2

Acquisitions and Divestitures - Discontinued Operations (Details) (USD $)	3 Months Ended								12 Months Ended					0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Jan. 31, 2014	Oct. 15, 2013
															Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total impairment charge									$1.80		$0		$0
Asset disposals and write-downs									37.8		7.1		285.7
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net revenue									0.4		40.7		92.9
(Loss) gain on sale of discontinued businesses, net of income taxes									-1.7		0.9		0
Loss from operations of discontinued businesses, before income taxes									-0.6		-14.2		-17.7
Increase (decrease) in adjustment to carrying value of disposal group									0		6.7		0
Income tax benefit									0		0		-1.8
Loss from discontinued operations	0	0	-1.6	-0.7	-2.5	-8.7	-3.3	-5.5	-2.3	[1]	-20	[1]	-15.9
Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of business, total consideration															9.3
Number of receivables from purchaser															2
Cash payment received from sale of business					0.9				1.6
Estimated fair value of receivable	4.5				4				4.5		4
Discount rate used in calculating fair value of contingent consideration	9.00%										9.00%
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
(Loss) gain on sale of discontinued businesses, net of income taxes									0.9
XtremeMac Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash payment received from sale of business														0.3
Notes receivable														0.3
Total impairment charge											-6.7
First Receivable | Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable															3.8
First Receivable | Other Current Assets | Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable	1.3				2.9				1.3		2.9
Second Receivable | Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable															5.5
To Be Received in 2014 | Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable															0.2
To Be Received in 2018 | Memorex Consumer Electronics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration note receivable increments, high range															2.2
Notes Receivable | XtremeMac Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Decrease in expected contingent consideration receivable											1.2
Future Proceeds from Sale of Acquired Inventory | XtremeMac Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of business, total consideration														3
Loss from Discontinued Operations | XtremeMac Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset disposals and write-downs									$1.20		$1.20
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Supplemental_Balance_Sheet_Inf2

Supplemental Balance Sheet Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Inventories
Finished goods	$51.10		$76.30
Work in process	0.7		2.9
Raw materials and supplies	5.9		5.1
Total inventories	57.7		84.3
Property, Plant and Equipment
Property, plant and equipment, gross	184		201.7
Less accumulated depreciation	-139		-150.1
Property, plant and equipment, net	45		51.6
Allowance for Doubtful Accounts Receivable [Roll Forward]
Reserves and allowances, beginning balance	14.5	[1]	18	[1]	18.4	[1]
Additions	2.9	[1]	6.6	[1]	10.3	[1]
Write-offs, net of recoveries	-8.3	[1]	-10.1	[1]	-10.7	[1]
Reserves and allowances, ending balance	9.1	[1]	14.5	[1]	18	[1]
Land
Property, Plant and Equipment
Property, plant and equipment, gross	1.2		1.2
Buildings and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	94.7		95.4
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	88		104
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, gross	0.1		1.1
Other Current Liabilities
Supplemental Balance Sheet Information [Line Items]
Rebates	26.9		33.2
Accrued payroll	$18.40		$19.50
[1]	Accounts receivable reserves and allowances include estimated amounts for customer returns, discounts on payment terms and the inability of certain customers to make the required payment.

Intangible_Assets_and_Goodwill2

Intangible Assets and Goodwill - Intangible Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$140.50	$139.50
Accumulated amortization	-82.6	-70.9
Intangible assets, net	57.9	68.6
Amortization expense	12.9	13.2	23.9
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Future estimated amortization expense, 2015	12.1
Future estimated amortization expense, 2016	9.9
Future estimated amortization expense, 2017	8.7
Future estimated amortization expense, 2018	6.6
Future estimated amortization expense, 2019	6.2
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	34.2	34.3
Accumulated amortization	-14	-9.2
Intangible assets, net	20.2	25.1
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	60.1	58.5
Accumulated amortization	-55.3	-53.3
Intangible assets, net	4.8	5.2
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	20	20.4
Accumulated amortization	-3.7	-2.1
Intangible assets, net	16.3	18.3
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	26.2	26.3
Accumulated amortization	-9.6	-6.3
Intangible assets, net	$16.60	$20

Intangible_Assets_and_Goodwill3

Intangible Assets and Goodwill - Intangible Assets Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$0
Finite-lived intangible assets		56,300,000
Indefinite-lived intangible assets not subject to amortization		1,700,000
Storage and Security Solutions
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets		$0

Intangible_Assets_and_Goodwill4

Intangible Assets and Goodwill - Goodwill (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$36.10	$72.10	$73.50
Goodwill impairment	-35.4	0	-23.3
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	249.3	250.7
Accumulated impairment losses, beginning balance	-177.2	-177.2
Goodwill, beginning balance	72.1	73.5
Nexsan purchase price adjustment		-1.6
Foreign currency translation	-0.6	0.2
Goodwill impairment	-35.4	0	-23.3
Goodwill, gross, ending balance	248.7	249.3	250.7
Accumulated impairment losses, ending balance	-212.6	-177.2	-177.2
Goodwill, ending balance	36.1	72.1	73.5
TSS
Goodwill [Line Items]
Goodwill	36.1	72.1
Goodwill impairment	-35.4
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	199.9	201.3
Accumulated impairment losses, beginning balance	-127.8	-127.8
Goodwill, beginning balance	72.1	73.5
Nexsan purchase price adjustment		-1.6
Foreign currency translation	-0.6	0.2
Goodwill impairment	-35.4
Goodwill, gross, ending balance	199.3	199.9
Accumulated impairment losses, ending balance	-163.2	-127.8
Goodwill, ending balance	36.1	72.1
CSA
Goodwill [Line Items]
Goodwill		0
Goodwill impairment	0
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	49.4	49.4
Accumulated impairment losses, beginning balance	-49.4	-49.4
Goodwill, beginning balance	0	0
Nexsan purchase price adjustment		0
Foreign currency translation	0	0
Goodwill impairment	0
Goodwill, gross, ending balance	49.4	49.4
Accumulated impairment losses, ending balance	-49.4	-49.4
Goodwill, ending balance		0
Income approach valuation technique | Goodwill
Goodwill [Line Items]
Discounted forecasted cash flows period	10 years	10 years
Discount rate	16.50%
Terminal growth rate	3.00%	3.00%
Discount rate adjustment	2.00%
Discount rate before adjustment	14.50%
Mobile Security
Goodwill [Line Items]
Fair value in excess of carrying amount, percent	107.40%	34.20%
Mobile Security | Income approach valuation technique | Goodwill
Goodwill [Line Items]
Discount rate		15.50%
Storage and Security Solutions
Goodwill [Line Items]
Goodwill	28.1
Fair value in excess of carrying amount, percent	8.20%	25.70%
Goodwill impairment	-35.4
Goodwill [Roll Forward]
Goodwill impairment	-35.4
Goodwill, ending balance	$28.10
Storage and Security Solutions | Income approach valuation technique | Goodwill
Goodwill [Line Items]
Discount rate		13.50%

Restructuring_and_Other_Expens2

Restructuring and Other Expense - Narrative (Details) (USD $)	12 Months Ended			27 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Charges	$5.40	$5.20	$19.70
Other restructuring charges	1.2	2.4	2.2
Inventory write-offs	4.6	2.7	2.3
Severance related to discontinued operations	3.9	2.1	16.9
Other accruals	98.2	116.4		98.2
Asset disposals and write-downs	37.8	7.1	285.7
Other expenses including certain employee costs and consulting fees	5.7	1	2.7
Gain on sale	0	9.8	0.7
Restructuring and other
Restructuring Cost and Reserve [Line Items]
Other expenses including certain employee costs and consulting fees	5.7
2012 Global Processing Improvement Restructuring Program
Restructuring Cost and Reserve [Line Items]
Legacy costs eliminated				100
Charges	4.4	6.8	14.9
2011 Corporate Strategy Restructuring Program
Restructuring Cost and Reserve [Line Items]
Charges			4.2
2011 Manufacturing Redesign Restructuring Program | Restructuring and other
Restructuring Cost and Reserve [Line Items]
Other restructuring charges			0.6
Other | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Inventory write-offs	4.6	2.7	2.3
Severance and Related
Restructuring Cost and Reserve [Line Items]
Other accruals	0.2			0.2
Severance and Related | 2012 Global Processing Improvement Restructuring Program
Restructuring Cost and Reserve [Line Items]
Charges	3.7	3.7
Severance and related	21.5			21.5
Inventory Write-off | 2012 Global Processing Improvement Restructuring Program
Restructuring Cost and Reserve [Line Items]
Severance and related	9.6			9.6
Lease Termination Costs
Restructuring Cost and Reserve [Line Items]
Other accruals	0.2			0.2
Lease Termination Costs | 2012 Global Processing Improvement Restructuring Program
Restructuring Cost and Reserve [Line Items]
Charges	0.1	0.7
Severance and related	1.1			1.1
Other
Restructuring Cost and Reserve [Line Items]
Other accruals	0.6			0.6
Other | 2012 Global Processing Improvement Restructuring Program
Restructuring Cost and Reserve [Line Items]
Charges	0.6	2.4
Severance and related	4.5			4.5
2013 Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Severance related to discontinued operations	1.6
Weatherford, Oklahoma | Disposal Group, Held-for-sale, Not Discontinued Operations | Restructuring and other
Restructuring Cost and Reserve [Line Items]
Asset disposals and write-downs	1
Disposals of miscellaneous assets	0.8
Camarillo, California | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Gain on sale		$9.80

Restructuring_and_Other_Expens3

Restructuring and Other Expense - Schedule of Restructuring and Other Expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Severance and related	$3.90	$2.10	$16.90
Lease termination costs	0.3	0.7	0.6
Other	1.2	2.4	2.2
Total restructuring	5.4	5.2	19.7
Settlement of UK pension plan	0.5	10.6	0
Gain on sale of fixed assets held for sale	0	-9.8	-0.7
Acquisition and integration related costs	0	2.8	3.7
Pension settlement/curtailment	0.2	2.1	2.4
Contingent consideration fair value adjustment	0	-0.6	-8.6
Intangible asset abandonment	0	0	1.9
Asset disposals / write down	1.8	0	0
Other expenses	5.7	1	2.7
Total	$13.60	$11.30	$21.10

Restructuring_and_Other_Expens4

Restructuring and Other Expense - Schedule of Restructuring Reserves (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Reserve [Roll Forward]
Charges	$5.40	$5.20	$19.70
2012 Global Processing Improvement Restructuring Program
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of period	3.4	14.7
Transfer from 2011 Corporate Program		2.2
Charges	4.4	6.8	14.9
Usage	-6.7	-20.1
Currency impacts	0.2	-0.2
Accrued balance, end of period	1.3	3.4	14.7
Severance and Related | 2012 Global Processing Improvement Restructuring Program
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of period	2.2	13.8
Transfer from 2011 Corporate Program		1.6
Charges	3.7	3.7
Usage	-5.1	-16.9
Currency impacts	0	0
Accrued balance, end of period	0.8	2.2
Lease Termination Costs | 2012 Global Processing Improvement Restructuring Program
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of period	0.4	0.1
Transfer from 2011 Corporate Program		0.4
Charges	0.1	0.7
Usage	-0.2	-0.7
Currency impacts	0	-0.1
Accrued balance, end of period	0.3	0.4
Other | 2012 Global Processing Improvement Restructuring Program
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of period	0.8	0.8
Transfer from 2011 Corporate Program		0.2
Charges	0.6	2.4
Usage	-1.4	-2.5
Currency impacts	0.2	-0.1
Accrued balance, end of period	$0.20	$0.80

StockBased_Compensation_Narrat

Stock-Based Compensation - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$5,300,000	$6,300,000	$6,600,000
Number of stock-based compensation award plans	4
Options expiration term	10 years
Award vesting period	4 years
Number of stock-based compensation awards consisting of stock options and restricted stock outstanding	2,591,649
Aggregate intrinsic value (less than)	100,000	800,000	100,000
Intrinsic value of options exercised in period (less than)	100,000
Grants in period, weighted average grant date fair value (dollars per share)	$1.72	$1.61	$2.53
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	1,400,000	2,700,000	3,300,000
Granted in period, shares	61,275	1,034,406	1,178,780
Aggregate intrinsic value (less than)	0	800,000	0	0
Tax benefit from stock-based compensation expense	500,000	900,000	1,100,000
Total unrecognized compensation expense related to non-vested stock	500,000
Total unrecognized compensation expense related to non-vested stock, period of recognition	1 year 1 month 6 days
Performance-based Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period, shares	61,275	113,125	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	3,900,000	3,600,000	3,300,000
Tax benefit from stock-based compensation expense	1,500,000	1,500,000	1,400,000
Total unrecognized compensation expense related to non-vested stock	2,400,000
Total unrecognized compensation expense related to non-vested stock, period of recognition	1 year 6 months
Stock-based compensation capitalized	0	0	0
Deferred tax assets, recognized tax benefit	0	0	0
Total fair value of shares vested in period	$3,800,000	$3,900,000	$3,300,000
Number of shares granted	1,229,249	837,443	708,573
Performance-based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period, shares	914,768	529,141	0
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration term	5 years
Number of shares granted	700,000	3,100,000
Stock Incentive Plan 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation awards consisting of stock options and restricted stock outstanding	2,655,254
Number of shares authorized to award	6,000,000
Number of shares available for grant	1,929,545
Stock Incentive Plan 2011 | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration term	10 years
Award vesting period	3 years
Share-based Compensation Award, Tranche One | Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options that vest if minimum trading period price is reached	50.00%
Vesting period for minimum stock price average	30 days
Minimum average share price for vesting	$10
Share-based Compensation Award, Tranche Two | Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options that vest if minimum trading period price is reached	50.00%
Vesting period for minimum stock price average	30 days
Minimum average share price for vesting	$15

StockBased_Compensation_Fair_V

Stock-Based Compensation - Fair Value Assumptions (Details) (Stock Options)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Volatility	46.00%	43.00%	45.00%
Risk-free interest rate	1.93%	1.05%	1.07%
Expected life (months)	73 months	72 months	71 months
Dividend yield	0.00%	0.00%	0.00%

StockBased_Compensation_Stock_

Stock-Based Compensation - Stock Option Activity (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Roll Forward]
Exercised (in shares)	-87,569	0	0
Weighted Average Exercise Price [Roll Forward]
Aggregate Intrinsic Value	$0.10	$0.80	$0.10
Stock Options
Stock Options [Roll Forward]
Outstanding, Beginning Balance (in shares)	5,371,538	5,818,472	5,679,579
Granted (in shares)	61,275	1,034,406	1,178,780
Exercised (in shares)	-87,569	0	0
Canceled (in shares)	-881,069	-1,069,192	-752,415
Forfeited (in shares)	-566,189	-412,148	-287,472
Outstanding, Ending Balance (in shares)	3,897,986	5,371,538	5,818,472	5,679,579
Weighted Average Exercise Price [Roll Forward]
Oustanding, Beginning Balance (dollars per share)	$13.11	$16.57	$19.87
Granted (dollars per share)	$3.72	$3.85	$5.80
Exercised (dollars per share)	$3.97	$0	$0
Canceled (dollars per share)	$19.05	$25.22	$26.61
Forfeited (dollars per share)	$4.14	$7.13	$9.24
Outstanding, Ending Balance (dollars per share)	$13.07	$13.11	$16.57	$19.87
Weighted Average Remaining Contractual Life (Years)	4 years 9 months 18 days	6 years 1 month 6 days	5 years 10 months 24 days	6 years
Aggregate Intrinsic Value	$0	$0.80	$0	$0

ShareBased_Compensation_Option

Share-Based Compensation - Options Exercisable and Expected to Vest (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$3.48
Range of exercise prices, upper range limit (in dollars per share)	$46.97
Exercisable options, stock options, shares	3,370,351
Exercisable options, weighted average remaining contractual life	4 years 3 months 18 days
Exercisable options, weighted average exercise price (in dollars per share)	$14.39
Options expected to vest, stock options, shares	488,399
Options expected to vest, weighted average remaining contractual life	8 years
Options expected to vest, weighted average exercise price (in dollars per share)	$4.67
$3.48 to $6.16
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$3.48
Range of exercise prices, upper range limit (in dollars per share)	$6.16
Exercisable options, stock options, shares	618,973
Exercisable options, weighted average remaining contractual life	6 years 7 months 6 days
Exercisable options, weighted average exercise price (in dollars per share)	$5.32
Options expected to vest, stock options, shares	481,243
Options expected to vest, weighted average remaining contractual life	8 years
Options expected to vest, weighted average exercise price (in dollars per share)	$4.61
$6.17 to $9.64
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$6.17
Range of exercise prices, upper range limit (in dollars per share)	$9.64
Exercisable options, stock options, shares	475,772
Exercisable options, weighted average remaining contractual life	4 years 4 months 24 days
Exercisable options, weighted average exercise price (in dollars per share)	$8.66
Options expected to vest, stock options, shares	4,094
Options expected to vest, weighted average remaining contractual life	7 years 1 month 6 days
Options expected to vest, weighted average exercise price (in dollars per share)	$6.19
$9.65 to $19.20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$9.65
Range of exercise prices, upper range limit (in dollars per share)	$19.20
Exercisable options, stock options, shares	1,417,382
Exercisable options, weighted average remaining contractual life	4 years 9 months 18 days
Exercisable options, weighted average exercise price (in dollars per share)	$10.06
Options expected to vest, stock options, shares	3,062
Options expected to vest, weighted average remaining contractual life	6 years 2 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$11.31
$19.21 to $23.95
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$19.21
Range of exercise prices, upper range limit (in dollars per share)	$23.95
Exercisable options, stock options, shares	9,500
Exercisable options, weighted average remaining contractual life	3 years
Exercisable options, weighted average exercise price (in dollars per share)	$20.20
Options expected to vest, stock options, shares	0
Options expected to vest, weighted average remaining contractual life	0 years 0 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$0
$23.96 to $28.70
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$23.96
Range of exercise prices, upper range limit (in dollars per share)	$28.70
Exercisable options, stock options, shares	403,837
Exercisable options, weighted average remaining contractual life	2 years 4 months 24 days
Exercisable options, weighted average exercise price (in dollars per share)	$24.62
Options expected to vest, stock options, shares	0
Options expected to vest, weighted average remaining contractual life	0 years 0 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$0
$28.71 to $39.38
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$28.71
Range of exercise prices, upper range limit (in dollars per share)	$39.38
Exercisable options, stock options, shares	323,487
Exercisable options, weighted average remaining contractual life	1 year 1 month 6 days
Exercisable options, weighted average exercise price (in dollars per share)	$35.97
Options expected to vest, stock options, shares	0
Options expected to vest, weighted average remaining contractual life	0 years 0 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$0
$39.39 to $41.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$39.39
Range of exercise prices, upper range limit (in dollars per share)	$41.75
Exercisable options, stock options, shares	118,900
Exercisable options, weighted average remaining contractual life	1 year 2 months 12 days
Exercisable options, weighted average exercise price (in dollars per share)	$41.62
Options expected to vest, stock options, shares	0
Options expected to vest, weighted average remaining contractual life	0 years 0 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$0
$41.76 to $46.97
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$41.76
Range of exercise prices, upper range limit (in dollars per share)	$46.97
Exercisable options, stock options, shares	2,500
Exercisable options, weighted average remaining contractual life	1 year 4 months 24 days
Exercisable options, weighted average exercise price (in dollars per share)	$45.76
Options expected to vest, stock options, shares	0
Options expected to vest, weighted average remaining contractual life	0 years 0 months 12 days
Options expected to vest, weighted average exercise price (in dollars per share)	$0

StockBased_Compensation_Restri

Stock-Based Compensation - Restricted Stock Activity (Details) (Restricted Stock, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock
Restricted Stock [Roll Forward]
Nonvested, Beginning Balance (in shares)	1,192,321	1,025,804	795,046
Granted (in shares)	1,229,249	837,443	708,573
Vested (in shares)	-734,533	-561,099	-321,103
Forfeited (in shares)	-338,120	-109,827	-156,712
Nonvested, Ending Balance (in shares)	1,348,917	1,192,321	1,025,804
Weighted Average Grant Date Fair Value Per Share [Roll Forward]
Nonvested, Beginning Balance (dollars per share)	$4.87	$7.12	$10.02
Granted (dollars per share)	$3.65	$3.75	$5.67
Vested (dollars per share)	$5.19	$6.99	$10.30
Forfeited (dollars per share)	$3.95	$6.59	$8.72
Nonvested, Ending Balance (dollars per share)	$3.81	$4.87	$7.12

Retirement_Plans_Pension_Plans

Retirement Plans - Pension Plans Narrative (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2015	Sep. 17, 2013
Defined Benefit Plan Disclosure [Line Items]
Total pension expense	$0.20	$2.60	$2
Settlement of UK pension plan, credit to income taxes	0	-2.3	0
Settlement of UK pension plan	0.5	10.6	0
Increase in projected benefit liability	2.3
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	2.1
United States
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	1.4	0
Minimum service years to be entitled to pension benefits	3 years
Pay credits as a percentage of each participant's eligible earnings				0.03	0.06
Interest credit rate in current year	0.038
Interest credit rate in next fiscal year	0.0304
Pension settlement loss	1.1	2.1	2.4
Noncurrent assets	0	0
International
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	0.7	1.5
Noncurrent assets	1.6	0
Minimum | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	1
Maximum | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	2
United Kingdom | International
Defined Benefit Plan Disclosure [Line Items]
Pension settlement loss		10.6
Settlement of UK pension plan, credit to income taxes		2.3
Noncurrent assets							6.4
Restructuring and other | United Kingdom | International
Defined Benefit Plan Disclosure [Line Items]
Settlement of UK pension plan	0.5
Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected increase in pension expense						$0.30

Retirement_Plans_Benefit_of_Ob

Retirement Plans - Benefit of Obligations and Plan Assets, Change to Benefit Obligations and Plan Assets, and Funded Status of Defined Benefit Plan (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
United States
Change in benefit obligation
Projected benefit obligation, beginning of year	$78.50	$88.30
Service cost	0	0	0
Interest cost	3.3	3.3	3.2
Actuarial (gain) loss	4.4	-1.7
Benefits paid	-1.8	-2
Settlements	-5.6	-9.4
Foreign exchange rate changes	0	0
Projected benefit obligation, end of year	78.8	78.5	88.3
Change in plan assets
Fair value of plan assets, beginning of year	71	71.7
Actual return on plan assets	2.5	10.7
Foreign exchange rate changes	0	0
Company contributions	1.4	0
Benefits paid	-1.8	-2
Settlements	-5.6	-9.4
Fair value of plan assets, end of year	67.5	71	71.7
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status of the plan, end of year	-11.3	-7.5
International
Change in benefit obligation
Projected benefit obligation, beginning of year	31.4	63.4
Service cost	0.3	0.5	0.6
Interest cost	0.9	2	2.2
Actuarial (gain) loss	6.5	-4.7
Benefits paid	-1.6	-3.5
Settlements	0	-24.8
Foreign exchange rate changes	-4.3	-1.5
Projected benefit obligation, end of year	33.2	31.4	63.4
Change in plan assets
Fair value of plan assets, beginning of year	26.1	58
Actual return on plan assets	1.6	-3.3
Foreign exchange rate changes	-3.2	-1.8
Company contributions	0.7	1.5
Benefits paid	-1.6	-3.5
Settlements	0	-24.8
Fair value of plan assets, end of year	23.6	26.1	58
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status of the plan, end of year	($9.60)	($5.30)

Retirement_Plans_Amounts_Recog

Retirement Plans - Amounts Recognized in Balance Sheet (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
United States
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	$0	$0
Noncurrent liabilities	-11.3	-7.5
Accumulated other comprehensive loss — pre-tax	19	14.3
International
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	1.6	0
Noncurrent liabilities	-11.2	-5.3
Accumulated other comprehensive loss — pre-tax	$10.40	$4.60

Retirement_Plans_Amounts_Recog1

Retirement Plans - Amounts Recognized in Other Comprehensive Income (Loss) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
United States
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	$19	$14.30
Prior service credit	0	0
Transition asset obligation	0	0
Total	19	14.3
International
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	12.1	7.6
Prior service credit	-2.2	-4
Transition asset obligation	0.5	1
Total	$10.40	$4.60

Retirement_Plans_Pension_Plans1

Retirement Plans - Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
United States
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation, end of year	$78.80	$78.50
Accumulated benefit obligation, end of year	78.8	78.5
Plan assets at fair value, end of year	67.5	71
International
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation, end of year	28.7	25.7
Accumulated benefit obligation, end of year	28.7	25.7
Plan assets at fair value, end of year	$17.60	$19.70

Retirement_Plans_Net_Periodic_

Retirement Plans - Net Periodic Benefit Cost (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Settlements and curtailments	$0.20	$12.70	$2.40
Estimated amortization of net actuarial loss amount	1.5
Estimated amortization of net prior service credit	0.4
Estimated amortization of net obligation at transition	0.3
United States
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0	0
Interest cost	3.3	3.3	3.2
Expected return on plan assets	-4.8	-5.1	-5.7
Amortization of net actuarial loss	1.1	1.9	1.5
Amortization of prior service credit	0	0	0
Amortization of transition obligation	0	0	0
Net periodic pension cost (credit)	-0.4	0.1	-1
Settlements and curtailments	1.1	2.1	2.4
Total pension cost	0.7	2.2	1.4
International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0.3	0.5	0.6
Interest cost	0.9	2	2.2
Expected return on plan assets	-0.8	-2.5	-2.3
Amortization of net actuarial loss	0.2	0.5	0.3
Amortization of prior service credit	-0.3	-0.4	-0.5
Amortization of transition obligation	0.1	0.3	0.3
Net periodic pension cost (credit)	0.4	0.4	0.6
Settlements and curtailments	-0.9	0	0
Total pension cost	-0.5	0.4	0.6
Minimum | International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total pension cost for individual plan (less than)	0.1	0.1	0.1
Total pension credit for individual plan (less than)	0.1		0.1
Maximum | International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total pension cost for individual plan (less than)	0.4	0.5	0.6
Total pension credit for individual plan (less than)	$0.80		$0.80

Retirement_Plans_Weighted_Aver

Retirement Plans - Weighted Average Assumptions Used in Calculating Benefit Obligation (Details)	Dec. 31, 2014	Dec. 31, 2013
United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.00%	4.50%
Rate of compensation increase	0.00%	0.00%
International
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	1.89%	3.20%
Rate of compensation increase	2.92%	2.89%

Retirement_Plans_Weighted_Aver1

Retirement Plans - Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Details)	6 Months Ended		12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.00%	4.50%	4.25%	[1]	4.00%	3.75%
Expected return on plan assets			7.75%		7.75%	8.00%
Rate of compensation increase			0.00%		0.00%	0.00%
International
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate			3.27%		2.70%	4.09%
Expected return on plan assets			3.35%		4.53%	4.32%
Rate of compensation increase			2.86%		2.00%	2.57%
[1]	The discount rate of 4.25 percent used to determine the 2014 net periodic benefit cost for the U.S. plan is an average of the discount rates used during the year of 4.50 percent for the first six months of the year and 4.00 percent for the last six months of the year.

Retirement_Plans_Information_a

Retirement Plans - Information about Plan Assets (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fixed income securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Target plan asset allocations range, minimum	20.00%
Target plan asset allocations range, maximum	40.00%
Equity securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Target plan asset allocations range, minimum	35.00%
Target plan asset allocations range, maximum	80.00%
Other investments
Defined Benefit Plan, Information about Plan Assets [Abstract]
Target plan asset allocations range, minimum	10.00%
Target plan asset allocations range, maximum	20.00%
United States
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	100.00%	100.00%
United States | Short-term investments
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	1.00%	1.00%
United States | Fixed income securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	23.00%	18.00%
United States | Equity securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	57.00%	63.00%
United States | Other investments | Absolute return strategy equity funds
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	19.00%	18.00%
United States | Other investments | Insurance contracts
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	0.00%	0.00%
International
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	100.00%	100.00%
International | Short-term investments
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	1.00%	1.00%
International | Fixed income securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	24.00%	23.00%
International | Equity securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	0.00%	0.00%
International | Other investments | Absolute return strategy equity funds
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	0.00%	0.00%
International | Other investments | Insurance contracts
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	75.00%	76.00%

Retirement_Plans_Expected_Futu

Retirement Plans - Expected Future Benefit Payments (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
United States
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2015	$15.70
2016	5
2017	4.6
2018	4.6
2019	4.7
2020-2024	25.5
International
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2015	1.1
2016	1.2
2017	1.2
2018	1.2
2019	1.2
2020-2024	$7

Retirement_Plans_Fair_Value_of

Retirement Plans - Fair Value of Plan Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$67.50	$71	$71.70
United States | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.5	29.3
United States | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	37	41.7
United States | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Short-term investments | Money market securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.4	0.5
United States | Short-term investments | Money market securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Short-term investments | Money market securities | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Large-cap growth funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Large-cap growth funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.6	16.1
United States | Equity securities | Large-cap growth funds | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | International growth fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.3	7.5
United States | Equity securities | International growth fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.5	3.6
United States | Equity securities | International growth fund | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Common Stock | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.3	8.3
United States | Equity securities | Common Stock | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Common Stock | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Commingled trust funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Equity securities | Commingled trust funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.7	9.2
United States | Equity securities | Commingled trust funds | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Fixed income securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15.5	13
United States | Fixed income securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Fixed income securities | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Other investments | Absolute return strategy equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Other investments | Absolute return strategy equity funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.2	12.8
United States | Other investments | Absolute return strategy equity funds | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.6	26.1	58
International | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.6	26.1
International | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Short-term investments | Short-term Investments - Other | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Short-term investments | Short-term Investments - Other | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.3	0.3
International | Short-term investments | Short-term Investments - Other | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Equity securities | Blended mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
International | Equity securities | Blended mutual funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
International | Equity securities | Blended mutual funds | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
International | Fixed income securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Fixed income securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.7	6.1
International | Fixed income securities | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Other investments | Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International | Other investments | Insurance contracts | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17.6	19.7
International | Other investments | Insurance contracts | Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Estimate of Fair Value | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	67.5	71
Estimate of Fair Value | United States | Short-term investments | Money market securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.4	0.5
Estimate of Fair Value | United States | Equity securities | Large-cap growth funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.6	16.1
Estimate of Fair Value | United States | Equity securities | International growth fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10.8	11.1
Estimate of Fair Value | United States | Equity securities | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.3	8.3
Estimate of Fair Value | United States | Equity securities | Commingled trust funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.7	9.2
Estimate of Fair Value | United States | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15.5	13
Estimate of Fair Value | United States | Other investments | Absolute return strategy equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.2	12.8
Estimate of Fair Value | International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.6	26.1
Estimate of Fair Value | International | Short-term investments | Short-term Investments - Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.3	0.3
Estimate of Fair Value | International | Equity securities | Blended mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Estimate of Fair Value | International | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.7	6.1
Estimate of Fair Value | International | Other investments | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$17.60	$19.70

Retirement_Plans_Employee_Reti

Retirement Plans - Employee Retirement Savings Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
401(k) retirement savings plan
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employee contribution of eligible compensation for matching, percent	1
Employer matching contribution, percent	5.00%
Cost recognized to match employee 401(k) contributions	$1,800,000	$1,700,000	$2,300,000
Variable compensation program
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer matching contribution, percent	3.00%
Employer contribution amount			700,000	700,000
2013 Plan Year | Variable compensation program
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer contribution amount	400,000
2012 Plan Year | Variable compensation program
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer contribution amount	0
2011 Plan Year | Variable compensation program
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer contribution amount			$700,000

Income_Taxes_Loss_from_Continu

Income Taxes - Loss from Continuing Operations before Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (Loss) from Continuing Operations before Income Taxes [Abstract]
U.S.	($95.30)	($25.20)	($266.10)
International	-14	2.2	-57.3
Loss from continuing operations before income taxes	($109.30)	($23)	($323.40)

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Benefit) from Continuing Operations (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$0.50	($0.70)	($11.50)
State	-0.5	0	0
International	-0.1	5.9	6.3
Deferred
Federal	1.7	0	8.8
State	0	0	0
International	1.5	-3.8	-2.2
Income tax provision	$3.10	$1.40	$1.40

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income tax provision	$3.10	$1.40	$1.40
Liability for unremitted foreign earnings included in income tax expense	1.7
Cash paid for income taxes	$4.70	$4.60	$4.40

Income_Taxes_Income_Tax_Reconc

Income Taxes - Income Tax Reconciliation (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax at statutory U.S. tax rate	($38.30)	($8.10)	($113.20)
State income taxes, net of federal benefit	-3.2	-0.2	-6.3
Net effect of international operations	1.1	3.1	25
Settlement of UK pension plan	0	-2.3	0
Valuation allowances	22.9	-3.2	89.2
Tax on unremitted earnings of foreign subsidiaries	15.9	0	0
U.S. tax on foreign earnings	4.7	6.2	3.9
Stock-based compensation	2.1	3.1	2.4
Uncertain tax positions	-1.2	2.2	0.3
Goodwill impairment	10.7	0	0
Capital losses	-11.4	0	0
Other	-0.2	0.6	0.1
Income tax provision	$3.10	$1.40	$1.40

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Deferred Tax Assets, Net [Abstract]
Accounts receivable allowances	$1.60	$3
Inventories	7.6	9.1
Compensation and employee benefits	6.6	8
Tax credit carryforwards	33.9	35.8
Net operating loss carryforwards	149.4	115.2
Accrued liabilities and other reserves	7	9
Pension	9	6
Property, plant and equipment	10.2	8.9
Intangible assets, net	49.6	55.3
Capital losses	11.5	0
Other, net	0.7	1.8
Total deferred tax assets	287.1	252.1
Valuation allowance	-262.4	-239.4	-239.1
Net deferred tax assets	24.7	12.7
Unremitted earnings of foreign subsidiaries	-15.7	0
Total deferred tax liabilities	0	0
Total deferred tax liabilities	-15.7	0
Net deferred tax assets	9	12.7
Valuation allowance	262.4	239.4	239.1
Deferred tax asset - current	3.2	4.6
Deferred tax asset - non-current	8.1	9.5
Deferred tax liability - current	0	-0.4
Deferred tax liability - non-current	($2.30)	($1)

Income_Taxes_Operating_Loss_Ca

Income Taxes - Operating Loss Carryforwards (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Operating Loss Carryforwards [Line Items]
Unremitted foreign earnings in deferred tax liabilities	$15.70	$0
Unremitted foreign earnings in deferred tax liabilities to be offset by net operating losses	14.1
Unremitted foreign earnings in deferred tax liabilities related to foreign tax withholding	1.6
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	348.5
U.S. and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	33.9
U.S. and Foreign | 2015 to 2017
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	7.6
U.S. and Foreign | 2018 to 2032
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	23.9
U.S. and Foreign | Indefinite
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	2.4
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	383.9
State and Local Jurisdiction | 2015 to 2017
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2.3
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	35.3
Foreign Tax Authority | 2015 to 2017
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.3
Foreign Tax Authority | Indefinite
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	32.6
Foreign Tax Authority | Various dates up to 2024
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2.4
Capital Loss Carryforward | Federal | 2019
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$30.10

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$5.30	$4.40	$15.10
Additions: Tax positions of current years	0.3	0.3	0.3
Additions: Tax positions of prior years	0.1	1.1	0.6
Reductions: Tax positions of prior years	-1.9	-0.4	-11.3
Reductions: Settlements with taxing authorities	-1.3	0	-0.2
Reductions: Lapse of statute of limitations	-0.4	-0.1	-0.1
Unrecognized tax benefits, ending balance	2.1	5.3	4.4
Reduction related to prior year tax position	1.9	0.4	11.3
Unrecognized tax benefits that reduced income tax expense but were offset by increase of valuation allowance			10.5
Unrecognized tax benefits that would impact effective tax rate	1.7
Interest and penalties recorded (benefit) expense	0.4	0.8	-1.3
Interest and penalties accrued	$0.20	$1.10	$0.30

Debt_Details

Debt (Details)

12 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

18-May-12

Dec. 31, 2014

Dec. 31, 2013

Aug. 15, 2012

Aug. 15, 2012

Dec. 31, 2014

18-May-12

Dec. 31, 2014

18-May-12

Jul. 16, 2013

Dec. 31, 2014

Jul. 16, 2013

Jul. 16, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

USD ($)

USD ($)

USD ($)

United States

United States

Europe

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Domestic Line of Credit

Domestic Line of Credit

Foreign Line of Credit

Foreign Line of Credit

Foreign Line of Credit

Foreign Line of Credit

Foreign Line of Credit

Foreign Line of Credit

Foreign Overdraft Line of Credit

Foreign Overdraft Line of Credit

Foreign Overdraft Line of Credit

Standby Letters of Credit

Standby Letters of Credit

USD ($)

Maximum

Maximum

USD ($)

USD ($)

USD ($)

Other Assets

Other Assets

Base Rate

Eurodollar Rate

United States

United States

Europe

Europe

Japan

Japan

Japan

Japan

Japan

Japan

Japan

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

JPY (¥)

USD ($)

JPY (¥)

USD ($)

Line of Credit Facility [Line Items]

Short-term debt

$18,900,000

$20,000,000

Maximum borrowing capacity

170,000,000

140,000,000

30,000,000

Outstanding loan amount when US and Europe borrowing base calculated quarterly

5,000,000

Line of credit facility, amount outstanding

8,000,000

500,000

100,000

7,900,000

2,500,000

300,000,000

0

Variable rate of interest during period

2.58%

2.70%

Current borrowing capacity

26,000,000

16,700,000

9,300,000

7,900,000

25,000,000

3,000,000,000

Basis spread on variable rate

1.00%

2.00%

Advances under credit facility borrowing base component

140,000,000

30,000,000

Borrowing base components, maximum percentage of eligible accounts receivable

85.00%

Borrowing base components, maximum percentage of eligible inventory

65.00%

Borrowing base components, maximum percentage of appraised net orderly liquidation value of eligible inventory

85.00%

Borrowing base components, maximum percentage of appraised fair market value of eligible real estate

60.00%

Borrowing base components, decrease of Original Real Estate Value each calendar month, percent

0.83%

Borrowing base components, maximum Original Real Estate Value

40,000,000

Consolidated fixed charge coverage ratio (not less than)

1

Covenant liquidity requirement

30,000,000

Debt issuance costs

0

400,000

Letters of credit outstanding, amount

1,000,000

700,000

Line of credit facility, available amount

5,000,000

600,000,000

Interest expense

2,600,000

2,500,000

2,900,000

Cash paid for interest

$1,800,000

$1,700,000

$2,400,000

Fair_Value_Measurements_Narrat

Fair Value Measurements - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit facility, amount outstanding	8,000,000
Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit facility, amount outstanding	18,900,000
Foreign Exchange Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument range, low	1 month
Derivative instrument range, high	16 months

Fair_Value_Measurements_Cash_F

Fair Value Measurements - Cash Flow Hedges (Details) (Cash flow hedges, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	7.3	4.4
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	0	0
Fair Value, Measurements, Recurring | Foreign currency option contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Foreign currency option contracts | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	1.8
Derivative liabilities	0	-0.2
Fair Value, Measurements, Recurring | Foreign currency option contracts | Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Foreign currency forward contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Foreign currency forward contracts | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	7.3	3.3
Derivative liabilities	0	-0.5
Fair Value, Measurements, Recurring | Foreign currency forward contracts | Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative duration period (or less)	12 months	12 months

Fair_Value_Measurements_Other_

Fair Value Measurements - Other Derivative Instruments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional Amount	$110.10	$163.20
Foreign currency forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gain (Loss) on foreign currency contracts	-0.8	1.7	0.7
Other Current Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets fair value	7.3	5.1
Other Current Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities fair value	0	-0.7
Hedges designated as hedging instruments | Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional Amount	86.7	133.8
Hedges designated as hedging instruments | Cash flow hedges | Other Current Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets fair value	7.3	5.1
Hedges designated as hedging instruments | Cash flow hedges | Other Current Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities fair value	0	-0.7
Other hedges not receiving hedge accounting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional Amount	23.4	29.4
Other hedges not receiving hedge accounting | Other Current Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets fair value	0	0
Other hedges not receiving hedge accounting | Other Current Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities fair value	0	0
Other Expense
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency transaction gain (loss)	$2.20	$0.50	$1.60

Shareholders_Equity_Treasury_S

Shareholders' Equity - Treasury Stock (Details) (USD $)	12 Months Ended			20 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	2-May-12
Class of Stock [Line Items]
Purchase of treasury stock	$2.50	$2.50	$6.50
Movement in Treasury Stock [Roll Forward]
Treasury Shares, Beginning Balance (in shares)	1,121,926	1,563,321	4,663,923
Purchases (in shares)	760,268	616,581	1,236,161
Exercise of stock options (in shares)	-87,569	0	0
Restricted stock grants and other (in shares)	-739,408	-622,241	-499,851
401(k) matching contribution (in shares)	-427,421	-435,735	-517,588
Shares issued for acquisition			-3,319,324
Treasury Shares, Ending Balance (in shares)	627,796	1,121,926	1,563,321	1,121,926
Common Stock
Class of Stock [Line Items]
Number of shares authorized to be repurchased					5,000,000
Stock repurchased during period, shares				2,600,000
Purchase of treasury stock				$11.60
Remaining number of shares authorized to be repurchased	2,400,000
Average price per share of treasury stock acquired and held	$15.31

Shareholders_Equity_Accumulate

Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	($62.80)
Other comprehensive (loss) income before reclassifications, net of tax (1)	-20	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	-2
Net current period other comprehensive income (loss)	-22
Ending Balance	-84.8
Tax on unrealized gains on derivative financial instruments	3.1
Liability adjustments for defined benefit plans	1.7
Gains (Losses) on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	2.4
Other comprehensive (loss) income before reclassifications, net of tax (1)	6.1	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	-3.4
Net current period other comprehensive income (loss)	2.7
Ending Balance	5.1
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	-11.6
Other comprehensive (loss) income before reclassifications, net of tax (1)	-10.4	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	1.4
Net current period other comprehensive income (loss)	-9
Ending Balance	-20.6
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	-53.6
Other comprehensive (loss) income before reclassifications, net of tax (1)	-15.7	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	0
Net current period other comprehensive income (loss)	-15.7
Ending Balance	($69.30)
[1]	Income tax expense of $3.1 million was recorded for unrealized gains on derivative financial instruments and income tax benefit of $1.7 million for liability adjustments for defined benefit plans for the year ended December 31, 2014.

Shareholders_Equity_Reclassifi

Shareholders' Equity - Reclassification Out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax provision									$3.10		$1.40		$1.40
Net loss	-14.4	-61.4	-21.4	-17.5	16.7	-34.9	-5.1	-21.1	-114.7	[1]	-44.4	[1]	-340.7
Selling, general and administrative									174.7		181.6		191.1
Restructuring and other									13.6		11.3		21.1
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net loss									-2
Gains (Losses) on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold									-5.5
Income tax provision									2.1
Net loss									-3.4
Pension Adjustments | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax provision									0.2
Net loss									1.4
Selling, general and administrative									0.2
Restructuring and other									$1
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Business_Segment_Information_a2

Business Segment Information and Geographic Data - Narrative (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	product_category
Segment Reporting Information [Line Items]
Number of reporting segments	2
Number of major product categories	2
Goodwill impairment	35.4	$0	$23.30
Intangible impairments	0	0	251.8
Restructuring and other	13.6	11.3	21.1
Litigation settlement	0	-2.5	0
Corporate and unallocated
Segment Reporting Information [Line Items]
Goodwill impairment	35.4		23.3
Intangible impairments			251.8
Restructuring and other	13.6	11.3	21.1
Litigation settlement		$2.50
Net revenue | Geographic Concentration Risk | Japan
Segment Reporting Information [Line Items]
Concentration risk, percentage	23.50%	20.60%	21.00%

Business_Segment_Information_a3

Business Segment Information and Geographic Data Business Segment Information and Geographic Data - Net Revenue and Operating Income (Loss) by Segment (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Net Revenue	$197	$175	$178.60	$178.90	$232.80	$191.90	$211.70	$224.40	$729.50	[1]	$860.80	[1]	$1,006.70
Operating Income (Loss)	-12.1	-55.8	-20.1	-16.1	21.1	-26.5	0	-14.7	-104.1	[1]	-20.1	[1]	-318.4
Interest income									-0.5		-0.2		-0.5
Interest expense									2.6		2.5		2.9
Other expense, net									3.1		0.6		2.6
Loss from continuing operations before income taxes									-109.3		-23		-323.4
Corporate and Operating
Segment Reporting Information [Line Items]
Operating Income (Loss)									-104.1		-20.1		-318.4
Operating Segments
Segment Reporting Information [Line Items]
Net Revenue									729.5		860.8		1,006.70
Operating Income (Loss)									-12.7		36.2		34.8
Operating Segments | Consumer Storage and Accessories
Segment Reporting Information [Line Items]
Net Revenue									393.5		478.3		635.3
Operating Income (Loss)									19.3		52.3		61.5
Operating Segments | Consumer Storage Media
Segment Reporting Information [Line Items]
Net Revenue									342.9		435.7		594.3
Operating Segments | Audio and Accessories
Segment Reporting Information [Line Items]
Net Revenue									50.6		42.6		41
Operating Segments | Tiered Storage and Security Solutions
Segment Reporting Information [Line Items]
Net Revenue									336		382.5		371.4
Operating Income (Loss)									-32		-16.1		-26.7
Operating Segments | Commercial Storage Media
Segment Reporting Information [Line Items]
Net Revenue									213.4		251		311.6
Operating Segments | Storage and Security Solutions
Segment Reporting Information [Line Items]
Net Revenue									122.6		131.5		59.8
Corporate and unallocated
Segment Reporting Information [Line Items]
Operating Income (Loss)									-91.4		-56.3		-353.2
Segment Reconciling Items
Segment Reporting Information [Line Items]
Interest income									-0.5		-0.2		-0.5
Interest expense									2.6		2.5		2.9
Other expense, net									$3.10		$0.60		$2.60
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Business_Segment_Information_a4

Business Segment Information and Geographic Data - Segment Information by Geographic Region (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Net Revenue	$197	$175	$178.60	$178.90	$232.80	$191.90	$211.70	$224.40	$729.50	[1]	$860.80	[1]	$1,006.70
Reportable Geographical Components
Segment Reporting Information [Line Items]
Net Revenue									729.5		860.8		1,006.70
Long-Lived Assets	139				192.3				139		192.3		214.3
Reportable Geographical Components | United States
Segment Reporting Information [Line Items]
Net Revenue									253.6		348.1		376.2
Long-Lived Assets	121.6				150.7				121.6		150.7		166.9
Reportable Geographical Components | International
Segment Reporting Information [Line Items]
Net Revenue									475.9		512.7		630.5
Long-Lived Assets	$17.40				$41.60				$17.40		$41.60		$47.40
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.

Litigation_Commitments_and_Con2

Litigation, Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended		3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2011	Jun. 30, 2013	Dec. 31, 2013	Nov. 19, 2013	Dec. 31, 2014	Dec. 31, 2013	22-May-13
								Patent
								Entity
ECJ Copyright Levy
Loss Contingencies [Line Items]
Copyright levies payment	$100
Accrued copyright levies	9.3			10		9.3	10
Cost of Sales | ECJ Copyright Levy
Loss Contingencies [Line Items]
Copyright levies accrual reversal		7.8
Italy Copyright Levy
Loss Contingencies [Line Items]
Accrued copyright levies			13.6	19.6			19.6
Amount of copyright levy overpaid	19.4		39	39
Amount of remaining copyright levy overpaid other than copyright levy liabilities			25.4
Italy Copyright Levy | Cost of Sales
Loss Contingencies [Line Items]
Copyright levies accrual reversal	3.4			2.6
France Copyright Levy
Loss Contingencies [Line Items]
Accrued copyright levies	12.1			9.5		12.1	9.5
Amount of copyright levy overpaid	43				55.1	55.1
Amount of remaining copyright levy overpaid other than copyright levy liabilities							45.6
France Copyright Levy | Cost of Sales
Loss Contingencies [Line Items]
Copyright levies accrual reversal	2.6
Other EU Jurisdictions
Loss Contingencies [Line Items]
Accrued copyright levies	8.3					8.3
Pending Litigation | France Copyright Levy
Loss Contingencies [Line Items]
Disputed amount of levy payments withheld				3.6			3.6
Pending Litigation | One-Blue LLC and Members
Loss Contingencies [Line Items]
Number of plaintiffs								5
Number of patents allegedly infringed								6
Other Liabilities
Loss Contingencies [Line Items]
Environmental-related accruals	$0.20					$0.20

Litigation_Commitments_and_Con3

Litigation, Commitments and Contingencies - Operating Leases (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leases, Rent Expense, Net [Abstract]
Minimum lease payments	$7.80	$8.50	$6.10
Contingent rentals	1.6	3.8	6.1
Rental income	-8.6	-8.4	-3.4
Sublease income	0	-0.5	-0.7
Total rental expense, net	0.8	3.4	8.1
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	5
2016	3.7
2017	2.9
2018	1.6
2019	0.6
Thereafter	1.4
Total	15.2
Warehouse providers | Cost of Sales
Operating Leases, Rent Expense, Net [Abstract]
Minimum lease payments	0.8	0.9	0.8
Contingent rentals	$1.80	$2.80	$1.80

Related_Party_Transactions_Det

Related Party Transactions (Details) (TDK Recording Media business, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
TDK Recording Media business
Related Party Transaction [Line Items]
Ownership percentage by related party	18.00%
Purchases from related party	$3,000,000	$28,000,000	$38,000,000
Trade payable to related party	0	1,600,000
Trade receivables from related party	$0	$0

Quarterly_Data_Unaudited_Detai

Quarterly Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$197	$175	$178.60	$178.90	$232.80	$191.90	$211.70	$224.40	$729.50	[1]	$860.80	[1]	$1,006.70
Gross profit	39.6	31.2	33.9	33.7	55.3	36.1	55.2	42.1	138.4	[1]	188.7	[1]	189.3
Operating Income (Loss)	-12.1	-55.8	-20.1	-16.1	21.1	-26.5	0	-14.7	-104.1	[1]	-20.1	[1]	-318.4
Income (Loss) from Continuing Operations Attributable to Parent	-14.4	-61.4	-19.8	-16.8	19.2	-26.2	-1.8	-15.6	-112.4	[1]	-24.4	[1]	-324.8
Loss from discontinued businesses, net of income taxes	0	0	-1.6	-0.7	-2.5	-8.7	-3.3	-5.5	-2.3	[1]	-20	[1]	-15.9
Net loss	($14.40)	($61.40)	($21.40)	($17.50)	$16.70	($34.90)	($5.10)	($21.10)	($114.70)	[1]	($44.40)	[1]	($340.70)
(Loss) earnings per common share, continuing operations:
Continuing operations, basic (dollars per share)	($0.35)	($1.49)	($0.48)	($0.41)	$0.47	($0.65)	($0.04)	($0.39)	($2.74)	[1]	($0.60)	[1]	($8.67)
Continuing operations, diluted (dollars per share)	($0.35)	($1.49)	($0.48)	($0.41)	$0.47	($0.65)	($0.04)	($0.39)	($2.74)	[1]	($0.60)	[1]	($8.67)
Loss per common share, discontinued operations:
Discontinued operations, basic (dollars per share)	$0	$0	($0.04)	($0.02)	($0.06)	($0.21)	($0.08)	($0.14)	($0.06)	[1]	($0.49)	[1]	($0.42)
Discontinued operations, diluted (dollars per share)	$0	$0	($0.04)	($0.02)	($0.06)	($0.21)	($0.08)	($0.14)	($0.06)	[1]	($0.49)	[1]	($0.42)
Income (Loss) from Operations before Extraordinary Items, Per Basic and Diluted Share [Abstract]
Basic (dollars per share)	($0.35)	($1.49)	($0.52)	($0.43)	$0.41	($0.86)	($0.13)	($0.52)	($2.80)	[1]	($1.10)	[1]	($9.09)
Diluted (dollars per share)	($0.35)	($1.49)	($0.52)	($0.43)	$0.41	($0.86)	($0.13)	($0.52)	($2.80)	[1]	($1.10)	[1]	($9.09)
[1]	The sum of the quarterly loss per share may not equal the annual loss per share due to changes in average shares outstanding.