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Business Segment Information Schedule of Changes in Estimates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Change in Accounting Estimate [Line Items]
Reserve for estimated losses on uncompleted contracts	$ 73	$ 127	$ 73	$ 127	$ 159	$ 109
Changes in Estimates at Completion			42	3
Initial Changes [Member]
Change in Accounting Estimate [Line Items]
Reserve for estimated losses on uncompleted contracts	(6)	50	(6)	50
Amortization of Loss Provision [Member]
Change in Accounting Estimate [Line Items]
Reserve for estimated losses on uncompleted contracts	(80)	(32)	(80)	(32)
Canadian Pipe Fabrication And Module Assembly Projects [Member]
Change in Accounting Estimate [Line Items]
Reserve for estimated losses on uncompleted contracts	11		11		53
Changes in Estimates at Completion	18	$ 41	16	$ 82
Power Projects [Member]
Change in Accounting Estimate [Line Items]
Reserve for estimated losses on uncompleted contracts	$ 52		$ 52		$ 80

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Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 605



-SubTopic 35



-Section 45



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57777-111642

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