Investments in Affiliates Investments in Affiliates (Policies)	3 Months Ended
	Mar. 31, 2015
Investments in Affiliates [Abstract]
Consolidation, Variable Interest Entity, Policy [Policy Text Block]	Generally, each construction joint venture is formed to complete a specific contract and is jointly controlled by the venture members. The associated agreements typically provide that our interests in any profits and assets, and our respective share in any losses and liabilities resulting from the performance of the contracts, are limited to our stated percentage interest in the venture. Under our contractual arrangements, we provide capital to these joint ventures in return for an ownership interest. In addition, members dedicate resources to the ventures necessary to complete the contracts and are reimbursed for their cost. The operational risks of each construction joint venture are passed along to the joint venture members. As we absorb our share of these risks, our investment in each venture is exposed to potential gains and losses. We have determined that certain of these joint ventures are consolidated because they are variable interest entities (“VIEs”), and we are the primary beneficiary, or because they are not VIEs, and we hold the majority voting interest. We continually evaluate whether there are changes in the status of the VIEs or changes to the primary beneficiary designation of the VIE.

Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).

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