Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Summarized Financial Data

Unaudited summarized financial data by quarter for 2012 and 2011 (in millions, except per share amounts):

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
2012
Operating revenues	$	6,037		$	6,452		$	6,429		$	5,937
Operating income (loss)		(89	)		142			51			3
Net earnings (loss)		(1,660	)		(241	)		(238	)		263
Earnings (loss) per share:
Basic		(4.95	)		(0.72	)		(0.71	)		0.78
Diluted		(4.95	)		(0.72	)		(0.71	)		0.69
2011
Operating revenues	$	5,533		$	6,114		$	6,376		$	5,956
Operating income (loss)		(232	)		(78	)		39			(783	)
Net earnings (loss)		(436	)		(286	)		(162	)		(1,095	)
Earnings (loss) per share:
Basic		(1.31	)		(0.85	)		(0.48	)		(3.27	)
Diluted		(1.31	)		(0.85	)		(0.48	)		(3.27	)