The total amount of accounts receivable from customers under long-term contracts or programs associated with unapproved change orders or other similar items subject to uncertainty concerning their determination or ultimate realization.

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)(4))
-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
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-SubTopic 310
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68065756&loc=d3e49324-109356

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- Definition

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68068069&loc=d3e57807-111642

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-Topic 605
-SubTopic 35
-Section 45
-Paragraph 4
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- Definition

Total deductions and charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

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- Definition

Losses recognized in the current period on contracts which are expected to generate losses, which are probable and can be reasonably estimated, in a future period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Cash received for the settlement of litigation during the current period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
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[Line Items] for Billed and Unbilled Contract Claims Subject to Uncertainty [Table]

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Total Estimated Loss on Contracts

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Percentage of Completion Contracts (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	May 26, 2016	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2016	Jun. 30, 2015
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Litigation Settlement, Amount	$ 150			$ (112)		$ (112)
Proceeds from Legal Settlements			$ 62
Billings in Excess of Cost			(39)
Scenario, Forecast
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Proceeds from Legal Settlements		$ 16			$ 72
IRAQ
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Loss on Contracts			(52)	69		27
Total Estimated Loss on Contracts			532	406		406
Accounts Receivable, Unapproved Contract Claims			25	137		137
Deductions (Back Charges)			$ 32	$ 21		$ 21