Percentage-Of-Completion Contracts (Schedule Of Unapproved Claims And Change Orders) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Unapproved Change Orders And Claims Recorded In Revenues	$ 24	$ 32
Unapproved change orders	26	33	$ 46	$ 31
Changes in estimates at completion	12	48
Change Orders Approved by Customer	(32)	(40)
Adjustment due to disposition of business	0	(6)
Parent Share of Probable Unapproved Claims of Unconsolidated Subsidiary [Member]
Unapproved change orders	$ 65	$ 59

The amount of costs incurred on unapproved change orders when it is probable that the cost will be recovered through a change in the contract price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(c)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 910
-SubTopic 310
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68065756&loc=d3e49324-109356

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 910
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68053980&loc=d3e50000-109363

Name:	us-gaap_UnapprovedChangeOrdersAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant