Business, Basis of Presentation and Significant Accounting Policies (Goodwill and Indefinite-Lived Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit		0	0
Goodwill impairment testing, discounted cash flow methodology, number of reporting units	2	3
Goodwill [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, fair value measurements, significant assumptions	a discounted cash flow methodology incorporating Level 3 fair value assumptions, including: (i) management estimates, such as projections of revenue, operating costs and cash flows, taking into consideration historical and anticipated financial results; (ii) general economic and market conditions; and (iii) the impact of planned business and operational strategies. Management applied a discounted cash flow technique with an average terminal value in both years equal to 5.5 times normalized year five EBITDA, which is defined as earnings from continuing operations before interest, taxes, depreciation and amortization. The estimated discount rate is the Company’s average cost of capital at the time of the analysis, taking into consideration risks inherent within each reporting unit individually, which is greater than the risk inherent in the Company as a whole. The discount rate was estimated to range from 9.25% to 10.5% per annum for the year ended December 31, 2014 and was estimated to be 7.2% for the year ended December 31, 2013. Management believes the assumptions used in its quantitative goodwill impairment tests are reflective of the risks inherent in the business models of its reporting units and within its industry.
Impairment testing, fair value inputs, EBITDA multiple	5.5	5.5
Impairment testing, number of years of cash flows before terminal value	5 years	5 years
Impairment testing, discount rate (percentage)		7.20%
Impairment testing, fair value measurements, sensitivity analysis, description	A 100 basis point change in the discount rate would not have had a material impact on the results of these impairment tests as of the date the testing was performed.
Goodwill impairment testing, discount rate sensitivity analysis, percentage for which evaluation was completed	1.00%	1.00%
Goodwill [Member] | Minimum [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, discount rate (percentage)	9.25%
Goodwill [Member] | Maximum [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, discount rate (percentage)	10.50%
Communications [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit	0
Goodwill impairment testing, discounted cash flow methodology, number of reporting units	1
Power Generation and Industrial [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit	0
Goodwill impairment testing, discounted cash flow methodology, number of reporting units	1	1
Indefinite-lived intangible asset impairment testing, discounted cash flow methodology, number of indefinite-lived intangible assets	1	1
Indefinite-lived intangible asset impairment testing, percentage of fair value in excess of carrying amount	10.00%
Power Generation and Industrial [Member] | Indefinite-Lived Intangible Assets [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, fair value measurements, significant assumptions	using the relief-from-royalty method, which incorporated royalty savings over the estimated lives of the respective intangible asset and a terminal value capitalization rate based on the discount rate and estimated long-term growth rate.
Impairment testing, discount rate (percentage)	10.50%	7.20%
Oil and Gas [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit	0
Goodwill impairment testing, discounted cash flow methodology, number of reporting units		1
Oil and Gas [Member] | Impairment Test, Subsequent to Annual Review Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, discounted cash flow methodology, number of reporting units	2
Goodwill impairment testing, reporting unit, percentage of fair value in excess of carrying amount	15.00%
Indefinite-lived intangible asset impairment testing, discounted cash flow methodology, subsequent testing, number of years of cash flows	3 years
Oil and Gas [Member] | Goodwill [Member] | Impairment Test, Subsequent to Annual Review Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, fair value inputs, EBITDA multiple	5.5
Impairment testing, number of years of cash flows before terminal value	5 years
Oil and Gas [Member] | Goodwill [Member] | Impairment Test, Subsequent to Annual Review Member] | Minimum [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, discount rate (percentage)	12.00%
Oil and Gas [Member] | Goodwill [Member] | Impairment Test, Subsequent to Annual Review Member] | Maximum [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, discount rate (percentage)	13.50%
Oil and Gas [Member] | Indefinite-Lived Intangible Assets [Member] | Impairment Test, Subsequent to Annual Review Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Impairment testing, fair value measurements, significant assumptions	a cost methodology, incorporating an estimate of the opportunity cost associated with its loss based on a three-year discounted cash flow methodology. This impairment test incorporated Level 3 fair value assumptions consistent with those discussed above, no terminal value and an estimated discount rate of 13.5%.
Impairment testing, discount rate (percentage)	13.50%
Indefinite-lived intangible asset impairment testing, discounted cash flow methodology, subsequent testing, terminal value (in dollars)	$ 0
Other [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit	0
Electrical Transmission [Member]
Goodwill and Indefinite-Lived Intangible Assets [Line Items]
Goodwill impairment testing, number of aggregated components in reporting unit	4
Goodwill impairment testing, discounted cash flow methodology, number of reporting units		1