Basis of Presentation (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2020

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 30				Six Months Ended June 30
$ in millions, except per share data	2020		2019		2020		2019
Revenue	$	125	$	154	$	261	$	320
Operating income	112		158		236		296
Net earnings(1)	88		125		186		234
Diluted earnings per share(1)	0.53		0.73		1.11		1.37

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Based on a 21 percent statutory tax rate

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:

$ in millions	June 30, 2020			December 31, 2019
Unamortized prior service credit, net of tax expense of $10 for 2020 and $17 for 2019	$	30		$	51
Cumulative translation adjustment and other, net	(147		)	(148		)
Total accumulated other comprehensive loss	$	(117	)	$	(97	)