Basis Of Presentation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Basis Of Presentation [Abstract]
Date of emergence from bankruptcy proceedings	Nov. 21, 2005
Fresh-start accounting adoption, date	Oct. 01, 2005
Cumulative effect of changes in estimates of long term construction contract on operating income	$ 17	$ 4
Cumulative effect of changes in estimates of long term construction contract on diluted Earnings Per Share	$ 0.34	$ 0.07

The date of the fresh-start balance sheet when it is as of the fresh-start date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 45

-Paragraph 21

-URI http://asc.fasb.org/extlink&oid=6916575&loc=d3e55811-112764

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 55

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6585303&loc=d3e56228-112766

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6918054&loc=SL2890621-112765

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration