Supplementary Quarterly Financial Information (Unaudited) (Notes)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

SUPPLEMENTARY QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year to Date
	(In millions)
2013
Operating Revenues	$	1,219	$	1,265	$	1,457	$	1,256	$	5,197
Operating Income	$	235	$	202	$	338	$	225	$	1,000
Net Income	$	116	$	90	$	180	$	101	$	487
2012
Operating Revenues	$	1,198	$	1,289	$	1,542	$	1,262	$	5,291
Operating Income (a)	$	213	$	265	$	378	$	172	$	1,028
Net Income	$	97	$	127	$	195	$	67	$	486

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(a) In the fourth quarter of 2012, the Company recorded an adjustment that decreased operating income by $9 million ($5 million after tax) to correct other postretirement benefit expenses reported in prior periods. This adjustment is not considered material to the operating results of any of the relevant periods.