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Basis of Presentation (Unaudited) (Tables)
 6 Months Ended
Jun. 30, 2024
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 June 30Six Months Ended June 30
$ in millions, except per share data2024202320242023
Revenue$37 $95 $111 $157 
Operating income38 76 132 122 
Net earnings(1)
30 60 104 96 
Diluted earnings per share(1)
0.20 0.39 0.70 0.63 
(1)Based on a 21 percent federal statutory tax rate
Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss, net of tax, are as follows:
$ in millionsJune 30, 2024December 31, 2023
Cumulative translation adjustment$(138)$(138)
Other, net(8)10 
Total accumulated other comprehensive loss$(146)$(128)