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Debt (Tables) | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Summary of Debt | Debt is comprised of the following at the dates indicated (in millions):
| March 31, 2021 |  | December 31, 2020
3.15% senior notes due 2021 | $ | — |  |  | $ | 94 |
3.75% senior notes due 2021 | 354 |  |  | 369 |
4.00% senior notes due 2022 | 250 |  |  | 250 |
3.85% senior notes due 2023 | 1,085 |  |  | 1,090 |
4.00% senior notes due 2024 | 200 |  |  | 200 |
4.875% senior notes due 2025 | 493 |  |  | 492 |
3.90% senior notes due 2025 | 47 |  |  | 47 |
4.20% senior notes due 2026 | 1,974 |  |  | 1,973 |
5.375% senior notes due 2036 | 416 |  |  | 416 |
5.50% senior notes due 2046 | 657 |  |  | 657 |
Other debt | 16 |  |  | 19 |
Total debt | 5,492 |  |  | 5,607 |
Short-term debt and current portion of long-term debt | (357) |  |  | (466) |
Long-term debt | $ | 5,135 |  |  | $ | 5,141 |
Schedule of Fair Value of Senior Notes | The fair value of the Company’s senior notes are based upon prices of similar instruments in the marketplace and are as follows (in millions):
| March 31, 2021 |  | December 31, 2020
| Fair Value |  | Book Value |  | Fair Value |  | Book Value
Senior notes | $ | 6,123 |  |  | $ | 5,476 |  |  | $ | 6,277 |  |  | $ | 5,588 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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