Discontinued Operations - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Feb. 29, 2016 agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operation, foreign currency translation loss	$ 0.0	$ 0.1		$ 0.0	$ 75.8
Current assets of discontinued operations	11.1			11.1		$ 10.5
Current liabilities of discontinued operations	40.1			40.1		39.7
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operation, foreign currency translation loss	0.0	$ 0.1	$ 75.7	0.0	$ 75.8
Current assets of discontinued operations	11.1			11.1		10.5
Discontinued operation, restricted cash	9.8			9.8		9.4
Current liabilities of discontinued operations	40.1			40.1		39.7
Discontinued operation, account payable	21.8			21.8		22.8
Discontinued operation, customer credit and rebate accruals	3.0			3.0
Discontinued operation, legal accruals	12.6			12.6
Discontinued operation, other current liabilities	$ 2.7			$ 2.7
Disposal operation, restructuring accruals						3.2
Discontinued operation, rebates						11.0
Discontinued operation, deferred revenue and other current liabilities						$ 2.7
Discontinued Operations | Imation Mobile Security Software and Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, gain on disposal			$ 3.8
Discontinued Operations, Disposed of by Sale | Imation Mobile Security (IronKey Brand)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of sale agreements | agreement							2