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Debt (Tables) | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Schedule of Total Debt | Our total debt, including short-term and long-term debt, consisted of the following (in millions):
| As of December 31,
| 2019 |  | 2018
Debt: |  |  |
Short-term debt: |  |  |
Commercial Paper | $ | 1,311 |  |  | $ | 951 |
2020 Senior Notes (2.75% senior unsecured notes due December 1, 2020) | 1,248 |  |  | — |
Other short-term debt | 10 |  |  | — |
Total short-term debt | 2,569 |  |  | 951 |
Long-term debt: |  |  |
2020 Senior Notes (2.75% senior unsecured notes due December 1, 2020) | — |  |  | 1,246 |
2022 Senior Notes (2.35% senior unsecured notes due September 15, 2022) | 497 |  |  | 496 |
2023 Senior Notes (3.45% senior unsecured notes due September 21, 2023) | 398 |  |  | 397 |
2023 Senior Notes (4.00% senior unsecured notes due October 15, 2023) | 794 |  |  | 793 |
2025 Senior Notes (3.75% senior unsecured notes due December 1, 2025) | 1,244 |  |  | 1,243 |
2027 Senior Notes (3.10% senior unsecured notes due September 15, 2027) | 496 |  |  | 496 |
2028 Senior Notes (3.75% senior unsecured notes due September 21, 2028) | 592 |  |  | 591 |
2048 Senior Notes (4.25% senior unsecured notes due September 21, 2048) | 1,229 |  |  | 1,228 |
Total long-term debt | 5,250 |  |  | 6,490 |
Total debt | $ | 7,819 |  |  | $ | 7,441 |
Debt Repayment Schedule | As of December 31, 2019, the outstanding debt repayment schedule is as follows (in millions):
2020 | $ | 2,574 |
2021 | — |
2022 | 500 |
2023 | 1,200 |
2024 | — |
Thereafter | 3,600 |
Principal amounts repayable | 7,874 |
Debt issuance costs | (35 | )
Unamortized balance discounts on bonds, net | (20 | )
Total debt outstanding | $ | 7,819 |

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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 the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + 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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