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Basis Of Presentation Basis of Presentation (Tables)
 9 Months Ended
Sep. 30, 2017
Net cumulative catch-up adjustments [Abstract]  
Schedule of Change in Accounting Estimate [Table Text Block]
Net cumulative catch-up adjustments to prior years' earnings, including reach-forward losses, across all contracts were as follows:
 
Nine months ended September 30
 
Three months ended September 30
 
2017

 
2016

 
2017

 
2016

Decrease to Earnings from Operations

($39
)
 

($656
)
 

($302
)
 

($69
)
Decrease to Diluted EPS

($0.05
)
 

($0.95
)
 

($0.35
)
 

($0.11
)