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Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt [Abstract] |
Schedule Of Debt | Total debt as of December 31, 2020 and 2019, is summarized below:
Millions | 2020 | 2019
Notes and debentures, 2.2% to 7.1% due through February 5, 2070 | $ | 26,608 | $ | 24,008
Equipment obligations, 2.6% to 6.2% due through January 2, 2031 |  | 885 |  | 923
Finance leases, 3.1% to 8.0% due through December 10, 2028 |  | 449 |  | 605
Term loans - floating rate, due October 28, 2021 |  | 250 |  | 250
Commercial paper, 0.2% to 0.3% due through January 21, 2021 |  | 75 |  | 200
Receivables securitization (Note 10) |  | - |  | 400
Medium-term notes |  | - |  | 8
Unamortized discount and deferred issuance costs |  | (1,538) |  | (1,194)
Total debt |  | 26,729 |  | 25,200
Less: current portion |  | (1,069) |  | (1,257)
Total long-term debt | $ | 25,660 | $ | 23,943
Aggregate Debt Maturities | The following table presents aggregate debt maturities as of December 31, 2020, excluding market value adjustments:
Millions |  |
2021 | $ | 1,072
2022 |  | 1,384
2023 |  | 1,384
2024 |  | 1,439
2025 |  | 1,429
Thereafter |  | 21,559
Total principal |  | 28,267
Unamortized discount and deferred issuance costs |  | (1,538)
Total debt | $ | 26,729
Unsecured Fixed Rate Debt Securities Issued Under Current Shelf Registration | During 2020, we issued the following unsecured, fixed-rate debt securities under our shelf registration:
Date | Description of Securities
January 31, 2020 | $500 million of 2.150% Notes due February 5, 2027
| $750 million of 2.400% Notes due February 5, 2030
| $1.0 billion of 3.250% Notes due February 5, 2050
| $750 million of 3.750% Notes due February 5, 2070
April 7, 2020 | $750 million of 3.250% Notes due February 5, 2050

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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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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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