Organization and Basis of Presentation Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2009	Sep. 30, 2009
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 22.9	$ 22.1
Deferred revenue, noncurrent	65.7	94.2
Increase installed capacity and adjust product mix [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Additions		32.8
Deferred revenue, current	6.9
Deferred revenue, noncurrent	13.6
Deferred revenue, revenue recognized	6.9	5.4
Delay of a major program
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Additions		9.3
Deferred revenue	7.7
Deferred revenue, current	1.1
Deferred revenue, noncurrent	6.6
Deferred revenue, revenue recognized	1.1	0.5
2009 GM Agreement [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Additions				$ 79.7
2009 GM agreement, cash received					$ 110.0
Deferred revenue	29.5
Deferred revenue, current	8.0
Deferred revenue, noncurrent	21.5
Deferred revenue, revenue recognized	8.0	8.0	$ 8.0
Miscellaneous Deferred Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue, revenue recognized	$ 7.4	$ 7.5	$ 10.5