Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments (Details Textual)

v3.8.0.1
Fair Value of Financial Instruments (Details Textual)
$ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2017
USD ($)
Nov. 30, 2017
CAD ($)
Feb. 28, 2018
USD ($)
Feb. 28, 2017
USD ($)
Feb. 29, 2016
USD ($)
Fair Value Disclosures [Abstract]          
Investment in equity securities, Trading $ 191.3 $ 245.0 $ 191.3 $ 0.0 $ 0.0
Unrealized gain on equity securities, Trading     464.3 0.0 $ 0.0
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     9,439.9 8,631.6  
Carrying amount [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     9,439.9 8,631.6  
Fair value [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     $ 9,398.4 $ 8,845.5