Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details Textual)

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Fair Value of Financial Instruments (Details Textual)
$ in Millions, $ in Millions
9 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CAD ($)
Nov. 30, 2019
USD ($)
Nov. 30, 2018
USD ($)
Feb. 28, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments     $ 33.7 $ 4,077.3  
Long-term debt, including current portion     12,074.5   $ 12,825.0
Carrying amount [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     12,074.5   12,825.0
Fair value [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     $ 12,800.6   $ 12,768.5
Convertible debt securities [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments $ 150.5 $ 200.0