Commitments And Contingencies (Tax Legislation, Guarantees, And Dividends) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	12 Months Ended
Jan. 26, 2012	Dec. 31, 2011
Commitments And Contingencies [Abstract]
New accounting standards effect on pre-tax earnings		$ 7
New accounting standards effect on after-tax earnings		5
Value of guarantees on both completed projects and projects under construction		435
Performance contract life, maximum remaining life (years)		15
Dividend declared on common stock, per share	$ 0.27
Contractual obligations due in, 2012		553
Contractual obligations due in, 2013 to 2014		716
Contractual obligations due in, 2015 to 2016		708
Contractual obligations due in, 2017 and thereafter		$ 2,125

New accounting standards effect on after-tax earnings.

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New accounting standards effect on pre-tax earnings.

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Performance Contract Life Maximum Remaining Term

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Value of guarantees on both completed projects and projects under construction.

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Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

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Amounts due that have been withheld by the contracting party against the reporting company's performance under the contract. These amounts will be collected upon complying with certain contractual terms or satisfaction and release by the contracting party. It is expected that such amounts will be collected after five years from the balance sheet date.

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

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph c

-Article 5

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-Subparagraph (SX 210.5-02.3(c)(4))

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Schedule amount of the billed retainage expected to be collected within one year from the balance sheet date.

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Topic 210

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-Subparagraph (SX 210.5-02.3(c)(4))

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