Segment Information - Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Net revenue	$ 191.9	$ 227.4	$ 628.0	$ 739.9
Operating Income (Loss)	(26.5)	(3.7)	(41.2)	(16.8)
Interest income	(0.1)	(0.1)	(0.1)	(0.4)
Interest expense	0.7	0.6	2.0	2.4
Other, net	1.1	(0.4)	1.0	2.2
Loss from continuing operations before income taxes	(28.2)	(3.8)	(44.1)	(21.0)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(4.9)	6.3	15.9	26.4
Corporate and Unallocated Amount
Segment Reporting Information [Line Items]
Operating Income (Loss)	(21.6)	(10.0)	(57.1)	(43.2)
Consumer Storage and Accessories
Segment Reporting Information [Line Items]
Net revenue	108.3	142.2	347.0	464.8
Consumer Storage and Accessories | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	3.3	12.9	30.0	45.5
Consumer Storage and Accessories | Consumer Storage Media
Segment Reporting Information [Line Items]
Net revenue	97.3	133.5	318.8	437.3
Consumer Storage and Accessories | Audio and Accessories
Segment Reporting Information [Line Items]
Net revenue	11.0	8.7	28.2	27.5
Tiered Storage and Security and Accessories
Segment Reporting Information [Line Items]
Net revenue	83.6	85.2	281.0	275.1
Tiered Storage and Security and Accessories | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(8.2)	(6.6)	(14.1)	(19.1)
Tiered Storage and Security and Accessories | Commercial Storage Media
Segment Reporting Information [Line Items]
Net revenue	54.3	72.9	183.0	234.2
Tiered Storage and Security and Accessories | Storage and Security Solutions
Segment Reporting Information [Line Items]
Net revenue	$ 29.3	$ 12.3	$ 98.0	$ 40.9