Discontinued Operations (Major Components of Assets and Liabilities of Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Current:
Cash and cash equivalents	$ 0	$ 1,300		$ 1,075
Other current assets		641
Total current assets	0	1,941
Long-term:
Property, plant and equipment, net		4,472
Other long-term assets		1,609
Total long-term assets	0	6,081
Total assets of discontinued operations		8,022
Liabilities:
Total current liabilities	0	359
Long-term:
Long-term debt		4,855
Deferred income taxes		331	[1]
Other long-term liabilities		1,008
Total long-term liabilities	0	6,194
Total liabilities of discontinued operations		$ 6,553

[1] Deferred income taxes is primarily comprised of deferred tax liabilities related to basis differences in property.