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Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Debt With Interest Rates and Maturities | Debt maturities are presented below:
| December 31,
| 2020 |  | 2019
| ($ in millions)
Notes and debentures, with weighted-average interest rates as of December 31, 2020: |  |  |
3.65% maturing to 2025 | $ | 2,673 |  |  | $ | 3,048 |
4.32% maturing 2026 to 2031 | 2,714 |  |  | 2,714 |
4.11% maturing 2037 to 2055 | 7,497 |  |  | 5,904 |
6.07% maturing 2097 to 2118 | 784 |  |  | 1,331 |
Finance leases | 25 |  |  | 8 |
Discounts, premiums, and debt issuance costs | (1,012) |  |  | (809) |
Total debt | 12,681 |  |  | 12,196 |
Less current maturities | (579) |  |  | (316) |
Long-term debt excluding current maturities | $ | 12,102 |  |  | $ | 11,880 |
Long-term debt maturities subsequent to 2021 are as follows: |  |  |
2022 |  |  | $ | 553 |
2023 |  |  | 603 |
2024 |  |  | 403 |
2025 |  |  | 555 |
2026 and subsequent years |  |  | 9,988 |
Total |  |  | $ | 12,102 |

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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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