Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data [Abstract]

Summarized Financial Data

	First     Quarter			Second     Quarter			Third     Quarter			Fourth     Quarter
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	)
2010
Operating revenues	$	5,068		$	5,674		$	5,842		$	5,586
Operating income (loss)		(298	)		196			342			68
Net earnings (loss)		(505	)		(11	)		143			(97	)
Earnings (loss) per share:
Basic		(1.52	)		(0.03	)		0.43			(0.29	)
Diluted		(1.52	)		(0.03	)		0.39			(0.29	)