v3.3.1.900
Segment and geographic information (Detail)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
item
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Segment and geographic information                      
Number of Reportable Segments | item                 4    
Project revenues $ 98.4 $ 107.4 $ 103.1 $ 111.3 $ 119.9 $ 121.6 $ 123.1 $ 125.3 $ 420.2 $ 489.9 $ 473.4
Segment assets 1,717.1       2,916.0       1,717.1 2,916.0 2,541.1
Goodwill 134.5       197.2       134.5 197.2 296.3
Capital expenditures                 11.3 12.4 7.6
Project Adjusted EBITDA                 208.9 229.4 209.3
Change in fair value of derivative instruments                 (15.4) (6.2) (24.4)
Depreciation and amortization                 130.1 155.9 161.5
Interest, net                 9.8 20.5 19.0
Other project expense (income)                 125.8 98.1 8.2
Project (loss) income (104.3) $ 24.2 $ 17.2 $ 21.5 2.1 $ (64.7) $ (2.0) $ 25.7 (41.4) (38.9) 45.0
Administration                 29.4 37.9 35.2
Interest, net                 107.1 146.7 104.1
Foreign exchange gain                 60.3 38.3 27.4
Other income, net (Note 12)                 (3.1) (0.6) (10.5)
Loss from continuing operations before income taxes                 (114.5) (184.6) (56.4)
Income tax benefit                 (30.4) (31.4) (32.8)
Loss from continuing operations                 (84.1) (153.2) (23.6)
East U.S.                      
Segment and geographic information                      
Project revenues                 150.0 167.1 146.1
Segment assets 819.9       1,103.2       819.9 1,103.2 935.4
Goodwill 47.8       61.5       47.8 61.5 79.4
Capital expenditures                 7.0 3.1 1.5
Project Adjusted EBITDA                 104.8 106.4 105.2
Change in fair value of derivative instruments                   4.3 (5.2)
Depreciation and amortization                 42.5 55.0 54.9
Interest, net                 9.8 20.6 20.7
Other project expense (income)                 13.8 17.8 33.2
Project (loss) income                 38.7 8.7 1.6
Loss from continuing operations before income taxes                 38.7 8.7 1.6
Loss from continuing operations                 38.7 8.7 1.6
West U.S.                      
Segment and geographic information                      
Project revenues                 104.6 123.6 119.1
Segment assets 228.6       396.7       228.6 396.7 493.4
Goodwill                     50.3
Capital expenditures                 0.5 0.4 0.1
Project Adjusted EBITDA                 46.9 54.2 57.1
Depreciation and amortization                 39.3 40.3 41.4
Interest, net                   (0.1) 0.3
Other project expense (income)                   41.6 (26.3)
Project (loss) income                 7.6 (27.6) 41.7
Loss from continuing operations before income taxes                 7.6 (27.6) 41.7
Loss from continuing operations                 7.6 (27.6) 41.7
Canada Segment [Member]                      
Segment and geographic information                      
Project revenues                 164.7 198.3 208.6
Segment assets 423.8       676.8       423.8 676.8 967.9
Goodwill 86.7       135.7       86.7 135.7 166.6
Capital expenditures                 3.4 7.8 2.4
Project Adjusted EBITDA                 59.7 76.3 65.6
Change in fair value of derivative instruments                 (16.0) (11.7) (19.2)
Depreciation and amortization                 47.2 59.9 64.7
Interest, net                     0.1
Other project expense (income)                 114.2 38.6 1.9
Project (loss) income                 (85.7) (10.5) 18.1
Loss from continuing operations before income taxes                 (85.7) (10.5) 18.1
Loss from continuing operations                 (85.7) (10.5) 18.1
Un-Allocated Corporate                      
Segment and geographic information                      
Project revenues                 0.9 0.9 (0.4)
Segment assets $ 244.8       $ 739.3       244.8 739.3 144.4
Capital expenditures                 0.4 1.1 3.6
Project Adjusted EBITDA                 (2.5) (7.5) (18.6)
Change in fair value of derivative instruments                 0.6 1.2  
Depreciation and amortization                 1.1 0.7 0.5
Interest, net                     (2.1)
Other project expense (income)                 (2.2) 0.1 (0.6)
Project (loss) income                 (2.0) (9.5) (16.4)
Administration                 29.4 37.9 35.2
Interest, net                 107.1 146.7 104.1
Foreign exchange gain                 60.3 38.3 27.4
Other income, net (Note 12)                 (3.1) (0.6) (10.5)
Loss from continuing operations before income taxes                 (75.1) (155.2) (117.8)
Income tax benefit                 (30.4) (31.4) (32.8)
Loss from continuing operations                 $ (44.7) $ (123.8) $ (85.0)