Commitments and Contingencies (Unaudited) Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2016

Environmental Remediation Range of Future Costs [Line Items]

Environmental Remediation [Table Text Block]

$ in millions	Range of Reasonably Possible Future Costs(1)	Accrued Costs(2)		Deferred Costs(3)
March 31, 2016	$364 - $808	$	377	$	192
December 31, 2015	353 - 812	370		186

⁽¹⁾  The range of reasonably possible future costs does not take into consideration amounts expected to be recoverable through overhead charges on U.S. Government contracts.

⁽²⁾ As of March 31, 2016, $110 million is recorded in other current liabilities and $267 million is recorded in other non-current liabilities.

⁽³⁾ As of March 31, 2016, $62 million is deferred in inventoried costs and $130 million is deferred in other non-current assets. These amounts are evaluated for recoverability on a routine basis.