Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments - Debt and Investments (Details)

v3.21.1
Fair Value of Financial Instruments - Debt and Investments (Details)
$ in Millions, $ in Millions
12 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CAD ($)
Feb. 28, 2021
USD ($)
Feb. 29, 2020
USD ($)
Feb. 28, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments     $ 222.4 $ 48.2 $ 4,081.5
Long-term debt, including current portion     10,442.3 11,945.7  
Carrying amount          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     10,442.3 11,945.7  
Fair value          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     $ 11,580.9 $ 12,935.9  
Convertible debt securities          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments $ 150.5 $ 200.0