Unaudited Selected Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2010

Unaudited Selected Quarterly Data (Table) [Abstract]

Schedule of Unaudited Selected Quarterly Data

2010
$ in millions, except per share	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

2009
$ in millions, except per share	1st Qtr		2nd Qtr		3rd Qtr		4th Qtr
Sales and service revenues	$	6,586	$	7,049	$	6,732	$	7,283
Operating income		556		627		528		563
Earnings from continuing operations		325		381		401		327
Net earnings		364		370		461		491
Basic earnings per share from continuing operations		.99		1.18		1.26		1.05
Basic earnings per share		1.11		1.15		1.45		1.57
Diluted earnings per share from continuing operations		.98		1.17		1.25		1.04
Diluted earnings per share		1.10		1.14		1.44		1.56