XML 17 R39.htm IDEA: XBRL DOCUMENT v2.4.0.8
Organization and Basis of Presentation Revenue Recognition (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended 24 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
2009 GM Agreement [Member]
Dec. 31, 2012
2009 GM Agreement [Member]
Dec. 31, 2011
2009 GM Agreement [Member]
Sep. 30, 2009
2009 GM Agreement [Member]
Dec. 31, 2012
2008 GM Agreement [Member]
Dec. 31, 2011
2008 GM Agreement [Member]
Dec. 31, 2009
2008 GM Agreement [Member]
Dec. 31, 2008
2008 GM Agreement [Member]
Dec. 31, 2009
2008 GM Agreement [Member]
Dec. 31, 2013
Miscellaneous Deferred Revenue [Member]
Dec. 31, 2012
Miscellaneous Deferred Revenue [Member]
Dec. 31, 2011
Miscellaneous Deferred Revenue [Member]
Deferred Revenue Arrangement [Line Items]                            
2009 GM agreement, cash received           $ 110.0                
2009 GM agreement, deferred revenue recognized           79.7                
Deferred revenue     45.5                      
Deferred revenue, current 17.0 17.2 8.0                      
Deferred revenue, noncurrent 76.4 82.2 37.5                      
Deferred revenue, revenue recognized     8.0 8.0 8.0   9.5 57.0       10.5 13.1 15.6
2008 GM agreement, cash received in 2008                   115.0        
2008 GM agreement, cash received in 2009                 60.0          
2008 GM agreement, total deferred revenue recognized                     213.7      
2008 GM agreement, fair value of liability assumed by GM for postretirement cost sharing                     $ 38.7