v2.4.0.6
Guarantees and condensed consolidating financial information (Details 2) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Current assets:        
Cash and cash equivalents $ 85.7 $ 60.2 $ 106.6 $ 60.6
Restricted cash 43.5 28.6    
Accounts receivable 78.4 58.5    
Prepayments, supplies, and other 50.3      
Assets held for sale 346.8 351.4    
Total current assets 604.7 561.7    
Property, plant, and equipment, net 2,020.0 2,055.5    
Equity investments in unconsolidated affiliates 411.1 428.7    
Other intangible assets, net 505.7 524.9    
Goodwill 334.7 334.7    
Other assets 63.2      
Total assets 3,939.4 4,002.7 3,475.7  
Current liabilities:        
Accounts payable and accrued liabilities 87.4      
Revolving credit facility 64.1 67.0    
Current portion of long-term debt 121.7 121.2    
Liabilities held for sale 205.3 189.0    
Other current liabilities 31.6      
Total current liabilities 510.1 535.5    
Total long-term debt 1,474.1 1,459.1    
Convertible debentures 418.2 424.2    
Other non-current, liabilities 381.8      
Equity        
Common shares 1,285.3 1,285.5    
Preferred shares issued by a subsidiary company 221.3 221.3    
Accumulated other comprehensive loss (2.4) 9.4    
Retained deficit (583.5) (565.2)    
Total Atlantic Power Corporation shareholders' equity 920.7 951.0    
Noncontrolling interests 234.5 235.4    
Total equity 1,155.2 1,186.4 1,058.5 1,115.8
Total liabilities and equity 3,939.4 4,002.7    
Guarantor Subsidiaries
        
Current assets:        
Cash and cash equivalents 79.4 43.3    
Restricted cash 43.5      
Accounts receivable 142.5      
Prepayments, supplies, and other 43.9      
Assets held for sale 346.8      
Total current assets 656.1      
Property, plant, and equipment, net 1,849.0      
Equity investments in unconsolidated affiliates 4,692.1      
Other intangible assets, net 350.6      
Goodwill 276.5      
Other assets 523.6      
Total assets 8,347.9      
Current liabilities:        
Accounts payable and accrued liabilities 87.9      
Revolving credit facility 44.1      
Current portion of long-term debt 121.7      
Liabilities held for sale 205.3      
Other current liabilities 28.7      
Total current liabilities 487.7      
Total long-term debt 824.1      
Other non-current, liabilities 1,217.0      
Equity        
Common shares 5,082.0      
Preferred shares issued by a subsidiary company 256.7      
Accumulated other comprehensive loss (2.4)      
Retained deficit 248.3      
Total Atlantic Power Corporation shareholders' equity 5,584.6      
Noncontrolling interests 234.5      
Total equity 5,819.1      
Total liabilities and equity 8,347.9      
Curtis Palmer
        
Current assets:        
Accounts receivable 14.5      
Prepayments, supplies, and other 1.1      
Total current assets 15.6      
Property, plant, and equipment, net 172.3      
Other intangible assets, net 155.1      
Goodwill 58.2      
Total assets 401.2      
Current liabilities:        
Accounts payable and accrued liabilities 16.5      
Total current liabilities 16.5      
Other non-current, liabilities 8.4      
Equity        
Common shares 186.3      
Total Atlantic Power Corporation shareholders' equity 186.3      
Total equity 186.3      
Total liabilities and equity 401.2      
Atlantic Power
        
Current assets:        
Cash and cash equivalents 6.3 16.9    
Accounts receivable 2.1      
Prepayments, supplies, and other 6.3      
Total current assets 14.7      
Equity investments in unconsolidated affiliates 1,001.3      
Other assets 438.6      
Total assets 1,454.6      
Current liabilities:        
Accounts payable and accrued liabilities 63.7      
Revolving credit facility 20.0      
Other current liabilities 3.9      
Total current liabilities 87.6      
Total long-term debt 460.0      
Convertible debentures 418.2      
Other non-current, liabilities 0.5      
Equity        
Common shares 1,285.3      
Retained deficit (797.0)      
Total Atlantic Power Corporation shareholders' equity 488.3      
Total equity 488.3      
Total liabilities and equity 1,454.6      
Eliminations
        
Current assets:        
Accounts receivable (80.7)      
Prepayments, supplies, and other (1.0)      
Total current assets (81.7)      
Property, plant, and equipment, net (1.3)      
Equity investments in unconsolidated affiliates (5,282.3)      
Other assets (899.0)      
Total assets (6,264.3)      
Current liabilities:        
Accounts payable and accrued liabilities (80.7)      
Other current liabilities (1.0)      
Total current liabilities (81.7)      
Other non-current, liabilities (844.1)      
Equity        
Common shares (5,268.3)      
Preferred shares issued by a subsidiary company (35.4)      
Retained deficit (34.8)      
Total Atlantic Power Corporation shareholders' equity (5,338.5)      
Total equity (5,338.5)      
Total liabilities and equity $ (6,264.3)