Fair Value of Financial Instruments - Debt and Investments (Details) $ in Millions, $ in Millions |
6 Months Ended | ||||
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Jun. 30, 2019
USD ($)
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Jun. 30, 2019
CAD ($)
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Aug. 31, 2020
USD ($)
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Aug. 31, 2019
USD ($)
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Feb. 29, 2020
USD ($)
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| 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 | |||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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