Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Fair Value of Financial Instruments - Debt and Investments (Details)
$ in Millions, $ in Millions
6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
CAD ($)
Aug. 31, 2020
USD ($)
Aug. 31, 2019
USD ($)
Feb. 29, 2020
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments     $ 217.4 $ 33.0  
Long-term debt, including current portion     11,600.6   $ 11,945.7
Carrying amount          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     11,600.6   11,945.7
Fair value          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion     $ 12,975.1   $ 12,935.9
Convertible Debt Securities          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Payments to acquire investments $ 150.5 $ 200.0