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Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Debt Disclosure [Abstract] |
Debt | Debt consists of (in millions):
|  | December 31, |
|  | 2021 |  |  | 2020 |
$1.1 billion in Senior Notes, interest at 3.95% payable semiannually, principal due on December 1, 2042 |  |  | 1,090 |  |  |  | 1,089 |
$0.5 billion in Senior Notes, interest at 3.60% payable semiannually, principal due on December 1, 2029 |  |  | 494 |  |  |  | 493 |
$0.2 billion in Senior Notes, interest at 2.60% payable semiannually, principal due on December 1, 2022 |  |  | — |  |  |  | 182 |
Other debt |  |  | 129 |  |  |  | 70 |
Total Debt |  |  | 1,713 |  |  |  | 1,834 |
Less current portion |  |  | 5 |  |  |  | — |
Long-term debt |  | $ | 1,708 |  |  | $ | 1,834 |
Principal Payments of Debt | Principal payments of debt for years subsequent to 2021 are as follows (in millions):
2022 |  |  | 5 |
2023 |  |  | 26 |
2024 |  |  | 10 |
2025 |  |  | 21 |
2026 |  |  | 11 |
Thereafter |  |  | 1,640 |
|  | $ | 1,713 |

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