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Debt and Interest Rate Derivatives (Tables) | 6 Months Ended
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Jun. 30, 2020
Debt and Interest Rate Derivatives |
Components of Debt | The following table summarizes the major components of debt as of each balance sheet date (in millions) and provides the maturities and interest rate ranges of each major category as of June 30, 2020:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2020 |  | 2019
Senior notes, maturing through 2049, interest rates ranging from 2.4% to 7.75% (weighted average interest rate of 3.9% as of June 30, 2020 and December 31, 2019) | ​ | $ | 9,365 | ​ | $ | 9,965
Canadian senior notes, C$500 million maturing September 2026, interest rate of 2.6% | ​ |  | 368 | ​ |  | 385
Tax-exempt bonds, maturing through 2048, fixed and variable interest rates ranging from 0.1% to 4.3% (weighted average interest rate of 2.1% as of June 30, 2020 and 2.3% as of December 31, 2019) | ​ |  | 2,471 | ​ |  | 2,523
Financing leases and other, maturing through 2071, weighted average interest rate of 4.75% | ​ |  | 664 | ​ |  | 710
Debt issuance costs, discounts and other | ​ |  | (80) | ​ |  | (85)
​ | ​ |  | 12,788 | ​ |  | 13,498
Current portion of long-term debt | ​ |  | 3,190 | ​ |  | 218
​ | ​ | $ | 9,598 | ​ | $ | 13,280
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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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