Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenue	$ 9.6	$ 10.7
Cost of goods sold	5.2	6.3
Gross profit	4.4	4.4
Operating expenses:
Selling, general and administrative	8.8	10.6
Research and development	2.5	3.4
Restructuring and other	0.5	6.8
Total	11.8	20.8
Operating loss from continuing operations	(7.4)	(16.4)
Other income (expense):
Income from short term investments	0.0	1.6
Other income (expense), net	0.0	(1.5)
Total	0.0	0.1
Loss from continuing operations before income taxes	(7.4)	(16.3)
Income tax benefit	0.1	1.6
Loss from continuing operations	(7.3)	(14.7)
Discontinued operations:
Gain on sale of discontinued businesses, net of income taxes	0.0	2.4
Loss from discontinued operations, net of income taxes	(2.0)	(3.1)
Reclassification of cumulative translation adjustment	0.0	(75.7)
Loss from discontinued operations, net of income taxes	(2.0)	(76.4)
Net loss including noncontrolling interest	(9.3)	(91.1)
Less: loss attributable to noncontrolling interest	(1.5)	0.0
Net loss attributable to GlassBridge Enterprises, Inc.	$ (7.8)	$ (91.1)
Loss per common share attributable to GlassBridge common shareholders — basic and diluted:
Continuing operations (in dollars per share)	$ (1.41)	$ (3.97)
Discontinued operations (in dollars per share)	(0.49)	(20.65)
Net loss (in dollars per share)	$ (1.90)	$ (24.62)
Weighted average common shares outstanding, Basic and diluted (in shares)	4.1	3.7