Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details Textual)

v3.8.0.1
Fair Value of Financial Instruments (Details Textual)
CAD in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2017
CAD
Nov. 30, 2017
USD ($)
Nov. 30, 2017
USD ($)
Nov. 30, 2017
USD ($)
Nov. 30, 2016
USD ($)
Feb. 28, 2017
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term debt, including current portion   $ 8,137.4 $ 8,137.4 $ 8,137.4   $ 8,631.6
Investment in equity securities, Trading CAD 245.0 191.3   191.3 $ 0.0  
Unrealized gain on equity securities, Trading     216.8 216.8 $ 0.0  
Carrying amount [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term debt, including current portion   8,137.4 8,137.4 8,137.4   8,631.6
Fair value [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term debt, including current portion   $ 8,416.3 $ 8,416.3 $ 8,416.3   $ 8,845.5