Annual report pursuant to Section 13 and 15(d)

Business and Organization (Details)

v2.4.0.6
Business and Organization (Details)
12 Months Ended
Dec. 31, 2011
Entity
Dec. 31, 2010
Dec. 31, 2009
Entity
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 5    
Number of other businesses acquired     3
Business and Organization (Textual) [Abstract]      
Fiber Optic Licensing Terms, Minimum in years 5 years 5 years  
Fiber Optic Licensing Terms, Maximum in years 25 years 25 years  
Electric Power Division [Member] | CANADA
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 3    
Electric Power Division [Member] | UNITED STATES
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 1    
Natural Gas and Pipeline Division [Member] | AUSTRALIA
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 1