Basis of Presentation (Unaudited) (Tables)

3 Months Ended

Mar. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:

$ in millions	March 31, 2014			December 31, 2013
Unamortized benefit plan costs, net of tax benefit of $1,933 as of March 31, 2014 and $1,972 as of December 31, 2013	$	(2,939	)	$	(3,000	)
Cumulative translation adjustment	20			18
Net unrealized loss on marketable securities and cash flow hedges, net of tax benefit	(2		)	(2		)
Total accumulated other comprehensive loss	$	(2,921	)	$	(2,984	)