XML 62 R51.htm IDEA: XBRL DOCUMENT v3.7.0.1
Variable Interest Entities - Summary of Silverton Loan Notes (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Movement in Silverton Loan Notes [Roll Forward]          
Total change in fair value for the period $ (2.9) $ (4.4)      
Third party          
Movement in Silverton Loan Notes [Roll Forward]          
Total liability balance of Loan Notes, Beginning Balance 223.4 190.6 $ 190.6    
Total change in fair value for the period 2.9 4.4      
Total distributed in the period (111.2) (87.4)      
Total liability balance of Loan Notes, Ending Balance 115.1 107.6 223.4    
Loan notes (long-term liabilities)       $ 110.2 $ 104.5
Accrued expenses (current liabilities)       4.9 3.1
Total aggregate unpaid balance 223.4 190.6 190.6 115.1 107.6
Aspen Holdings          
Movement in Silverton Loan Notes [Roll Forward]          
Total liability balance of Loan Notes, Beginning Balance 54.5 44.4 44.4    
Total change in fair value for the period 0.7 1.1      
Total distributed in the period (28.3) (19.0)      
Total liability balance of Loan Notes, Ending Balance 26.9 26.5 54.5    
Loan notes (long-term liabilities)       26.9 25.9
Accrued expenses (current liabilities)       0.0 0.6
Total aggregate unpaid balance 54.5 44.4 44.4 26.9 26.5
Aspen Holdings and Third Parties          
Movement in Silverton Loan Notes [Roll Forward]          
Total liability balance of Loan Notes, Beginning Balance 277.9 235.0 235.0    
Total change in fair value for the period 3.6 5.5      
Total distributed in the period (139.5) (106.4)      
Total liability balance of Loan Notes, Ending Balance 142.0 134.1 277.9    
Loan notes (long-term liabilities)       137.1 130.4
Accrued expenses (current liabilities)       4.9 3.7
Total aggregate unpaid balance $ 277.9 $ 235.0 $ 235.0 $ 142.0 $ 134.1