Basis of Presentation (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2019

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	2019		2018		2019		2018
Operating income	$	158	$	143	$	296	$	259
Net earnings(1)	125		113		234		205
Diluted earnings per share(1)	0.73		0.64		1.37		1.17

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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, 2019			December 31, 2018
Unamortized prior service credit, net of tax expense of $24 for 2019 and $32 for 2018	$	75		$	98
Cumulative translation adjustment	(145		)	(144		)
Other, net	(5		)	(6		)
Total accumulated other comprehensive loss	$	(75	)	$	(52	)