Percentage of Completion Contracts (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Unapproved Change Orders, Amount	$ 53us-gaap_UnapprovedChangeOrdersAmount
ChangeOrdersApprovedbyCustomer	6wft_ChangeOrdersApprovedbyCustomer
Costs in Excess of Billings, Current	207
Iraq [Member]
Billed and Unbilled Contract Claims Subject to Uncertainty [Line Items]
Estimated loss on long term construction contract	337	333
Accounts Receivable, Unapproved Contract Claims	137	64
Deductions (Back Charges)	26
Loss on Contracts		26
Gain on Project	42
Accrued Fees and Other Revenue Receivable		$ 28

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.

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For an unclassified balance sheet, the amount of fees and other revenue, excluding investment income receivable, earned but not yet received, which were recognized in conformity with revenue recognition criteria based on estimates or specific contractual terms.

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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

+ References

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

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Total deductions and charges.

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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.

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

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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.

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-Publisher SEC

-Name Regulation S-X (SX)

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Gain on Project

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