Basis of Presentation (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2016

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	2016		2015		2016		2015
Operating Income	$	137	$	162	$	266	$	349
Net Earnings(1)	89		105		173		227
Diluted earnings per share(1)	0.49		0.54		0.95		1.15

⁽¹⁾  Based on statutory tax rates

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:

$ in millions	June 30, 2016			December 31, 2015
Unamortized benefit plan costs, net of tax benefit of $3,227 as of June 30, 2016 and $3,350 as of December 31, 2015	$	(5,040	)	$	(5,241	)
Cumulative translation adjustment	(95		)	(82		)
Net unrealized gain on marketable securities and cash flow hedges, net of tax	3			3
Total accumulated other comprehensive loss	$	(5,132	)	$	(5,320	)