v3.3.1.900
Equity method investments in unconsolidated affiliates - B/S and I/S (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Assets      
Total assets $ 382.4 $ 401.3 $ 451.4
Liabilities      
Total liabilities 96.2 94.4 99.3
Operating results      
Revenue 136.8 171.2 191.5
Project expenses 98.5 141.9 161.0
Project other expense (1.6) (3.8) (4.7)
Project income 36.7 25.5 25.8
Chambers      
Assets      
Current assets 15.0 14.4 11.8
Non-Current assets 201.7 213.4 224.0
Liabilities      
Current liabilities 3.7 3.5 4.4
Non-Current liabilities 77.3 81.0 77.7
Operating results      
Revenue 48.0 54.8 52.7
Project expenses 39.7 44.8 40.6
Project other expense (1.8) (3.0) (2.5)
Project income 6.5 7.0 9.6
Frederickson      
Assets      
Current assets 1.8 1.8 11.0
Non-Current assets 124.0 134.0 143.9
Liabilities      
Current liabilities 0.7 0.3 0.6
Non-Current liabilities 0.4 0.4 0.4
Operating results      
Revenue 21.6 20.6 20.7
Project expenses 19.0 18.4 18.5
Project other expense     (0.1)
Project income 2.6 2.2 2.1
Orlando      
Assets      
Current assets 10.0 6.3 7.4
Non-Current assets 10.2 11.3 12.5
Liabilities      
Current liabilities 11.7 6.5 5.6
Non-Current liabilities   0.1  
Operating results      
Revenue 54.1 50.5 45.6
Project expenses 27.1 31.9 42.3
Project income 27.0 18.6 3.3
Other      
Assets      
Current assets 12.2 12.9 14.6
Non-Current assets 7.5 7.2 26.2
Liabilities      
Current liabilities 0.6 1.4 4.0
Non-Current liabilities 1.8 1.2 6.6
Operating results      
Revenue 13.1 45.3 72.5
Project expenses 12.7 46.8 59.6
Project other expense 0.2 (0.8) (2.1)
Project income $ 0.6 $ (2.3) $ 10.8