Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 175.0	$ 191.9	$ 532.5	$ 628.0
Operating Income (Loss)	(55.8)	(26.5)	(92.0)	(41.2)
Interest income	(0.1)	(0.1)	(0.3)	(0.1)
Interest expense	0.7	0.7	1.9	2.0
Other, net expense	1.6	1.1	2.6	1.0
Loss from continuing operations before income taxes	(58.0)	(28.2)	(96.2)	(44.1)
Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	(2.7)	(4.9)	(12.7)	15.9
Corporate and Unallocated
Segment Reporting Information [Line Items]
Operating Income (Loss)	(53.1)	(21.6)	(79.3)	(57.1)
Consumer Storage and Accessories
Segment Reporting Information [Line Items]
Net revenue	92.0	108.3	287.1	347.0
Consumer Storage and Accessories | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	5.4	3.3	12.7	30.0
Consumer Storage and Accessories | Consumer storage media
Segment Reporting Information [Line Items]
Net revenue	79.4	97.3	253.4	318.8
Consumer Storage and Accessories | Audio and accessories
Segment Reporting Information [Line Items]
Net revenue	12.6	11.0	33.7	28.2
Tiered Storage and Security Solutions
Segment Reporting Information [Line Items]
Net revenue	83.0	83.6	245.4	281.0
Tiered Storage and Security Solutions | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	(8.1)	(8.2)	(25.4)	(14.1)
Tiered Storage and Security Solutions | Commercial storage media
Segment Reporting Information [Line Items]
Net revenue	54.3	54.3	159.7	183.0
Tiered Storage and Security Solutions | Storage and security solutions
Segment Reporting Information [Line Items]
Net revenue	$ 28.7	$ 29.3	$ 85.7	$ 98.0