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

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 310
-Section 50
-Paragraph 1
-Subparagraph (a)
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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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- Definition

Amount of revenue earned from products sold or services provided under the terms of a contract, including, but not limited to, government contracts and construction contracts, classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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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

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
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-Subparagraph (SX 210.5-03.2)
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- Definition

[Line Items] for Billed and Unbilled Contract Claims Subject to Uncertainty [Table]

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No definition available.

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ContractSettlementAmount

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Proceeds from Contract Settlements

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Total Estimated Loss on Contracts

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Percentage of Completion Contracts (Details) - USD ($)		3 Months Ended			6 Months Ended
Percentage of Completion Contracts (Details) - USD ($)	May 26, 2016	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2017
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Billings in excess of cost					$ (46,000,000)
Contract settlement amount	$ 150,000,000
Proceeds from contract settlements		$ 16,000,000	$ 72,000,000	$ 62,000,000
Iraq
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Total estimated loss on contracts				532,000,000	532,000,000
Contract claims revenue					0
Deductions (back charges)				32,000,000	$ 0
Loss on contracts				52,000,000
Accounts receivable, unapproved contract claims				$ 25,000,000