Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2010

Significant Accounting Policies (Table) [Abstract]

Property, Plant and Equipment, Estimated Useful Lives

	Years
Land improvements		2-45
Buildings and improvements		2-45
Machinery and other equipment		2-20
Capitalized software costs		3-5
Leasehold improvements		Length of lease

Accumulated Other Comprehensive Loss

	December 31
$ in millions	2010			2009
Cumulative translation adjustment				$	41
Net unrealized gain on marketable securities and cash flow hedges, net of tax expense of $3 as of December 31, 2010, and 2009	$	5			4
Unamortized benefit plan costs, net of tax benefit of $1,801 as of December 31, 2010, and $1,984 as of December 31, 2009		(2,762	)		(3,059	)
Total accumulated other comprehensive loss	$	(2,757	)	$	(3,014	)