Basis of Presentation (Unaudited) (Tables)

3 Months Ended

Mar. 31, 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 March 31
$ in millions, except per share data	2016		2015
Operating Income	$	129	$	187
Net Earnings(1)	84		122
Diluted earnings per share(1)	0.46		0.61

⁽¹⁾  Based on statutory tax rates

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:

$ in millions	March 31, 2016			December 31, 2015
Unamortized benefit plan costs, net of tax benefit of $3,288 as of March 31, 2016 and $3,350 as of December 31, 2015	$	(5,140	)	$	(5,241	)
Cumulative translation adjustment	(86		)	(82		)
Net unrealized gain on marketable securities and cash flow hedges, net of tax	2			3
Total accumulated other comprehensive loss	$	(5,224	)	$	(5,320	)