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Basis of Presentation (Unaudited) (Tables)
9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Change in Accounting Estimate [Table Text Block] The following table presents the effect of aggregate net EAC adjustments:
 Three Months Ended September 30Nine Months Ended September 30
$ in millions, except per share data2023202220232022
Revenue$95 $59 $252 $363 
Operating income58 45 180 310 
Net earnings(1)
46 36 142 245 
Diluted earnings per share(1)
0.30 0.23 0.93 1.57 
(1)Based on a 21 percent statutory tax rate
Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss, net of tax, are as follows:
$ in millionsSeptember 30, 2023December 31, 2022
Cumulative translation adjustment$(150)$(161)
Other, net3 
Total accumulated other comprehensive loss$(147)$(153)