Quarterly Financial Data (Unaudited) Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Selected quarterly financial information for all quarters of 2011 and 2010 is as follows:

	For the Quarter Ended
(in millions, except per share data)	March 31		June 30		September 30		December 31
2011
Revenues	$	25,432	$	25,234	$	25,280	$	25,916
Operating costs	23,211		23,135		23,210		23,842
Earnings from operations	2,221		2,099		2,070		2,074
Net earnings	1,346		1,267		1,271		1,258
Basic net earnings per common share	1.24		1.18		1.19		1.19
Diluted net earnings per common share	1.22		1.16		1.17		1.17
2010
Revenues	$	23,193	$	23,264	$	23,668	$	24,030
Operating costs	21,177		21,363		21,523		22,228
Earnings from operations	2,016		1,901		2,145		1,802
Net earnings	1,191		1,123		1,277		1,043
Basic net earnings per common share	1.04		1.00		1.15		0.95
Diluted net earnings per common share	1.03		0.99		1.14		0.94