Unaudited Selected Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2011

UNAUDITED SELECTED QUARTERLY DATA [Abstract]

Schedule of Unaudited Selected Quarterly Data

2011
$ in millions, except per share amounts	1st Qtr			2nd Qtr			3rd Qtr			4th Qtr
Sales and service revenues		$	6,734		$	6,560		$	6,612		$	6,506
Operating income			811			841			825			799
Earnings from continuing operations			496			520			520			550
Net earnings			530			520			520			548
Basic earnings per share from continuing operations			1.70			1.84			1.89			2.13
Basic earnings per share			1.82			1.84			1.89			2.12
Diluted earnings per share from continuing operations			1.67			1.81			1.86			2.09
Diluted earnings per share			1.79			1.81			1.86			2.09
Weighted-average common shares outstanding, in millions			291.8			282.6			274.9			258.2
Weighted-average diluted shares outstanding, in millions			296.9			287.2			279.3			262.7

2010
$ in millions, except per share amounts	1st Qtr			2nd Qtr			3rd Qtr			4th Qtr
Sales and service revenues		$	6,914		$	7,255		$	7,071		$	6,903
Operating income			680			749			723			675
Earnings from continuing operations			410			740			448			306
Net earnings			469			711			497			376
Basic earnings per share from continuing operations			1.36			2.47			1.53			1.05
Basic earnings per share			1.55			2.37			1.69			1.29
Diluted earnings per share from continuing operations			1.34			2.44			1.51			1.03
Diluted earnings per share			1.53			2.34			1.67			1.27
Weighted-average common shares outstanding, in millions			302.5			299.6			293.5			291.8
Weighted-average diluted shares outstanding, in millions			306.1			303.8			297.6			296.9