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v3.20.1

Debt and Credit Facilities (Tables) | 3 Months Ended
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Mar. 31, 2020
Long-term Debt, Unclassified [Abstract] |
Schedule of Long-term Debt Instruments |
Summary of Total Debt | March 2020 |  | December 2019
Senior unsecured notes: |  |  |
| Rate |  | Due |  |  |
| 4.375% |  | January 15, 2020 | $ | — |  |  | $ | 500 |
| Variable |  | November 30, 2020 | 328 |  |  | 333 |
| 2.625% |  | March 15, 2021 | 749 |  |  | 749 |
| 1.125% |  | November 30, 2023 | 599 |  |  | 609 |
| 3.375% |  | May 15, 2024 | 588 |  |  | 587 |
| 0.250% |  | December 3, 2024 | 923 |  |  | 938 |
| 3.375% |  | November 1, 2025 | 746 |  |  | 746 |
| 3.500% |  | March 15, 2026 | 991 |  |  | 991 |
| 2.125% |  | November 30, 2027 | 815 |  |  | 829 |
| 3.650% |  | March 7, 2028 | 596 |  |  | 596 |
| 0.750% |  | March 1, 2029 | 869 |  |  | 884 |
| 2.625% |  | November 30, 2030 | 700 |  |  | 712 |
| 1.000% |  | December 3, 2031 | 809 |  |  | 823 |
| 4.100% |  | April 1, 2043 | 392 |  |  | 391 |
| 4.375% |  | May 15, 2044 | 395 |  |  | 395 |
| 4.625% |  | March 15, 2046 | 981 |  |  | 981 |
Other | 26 |  |  | 26 |
Total debt | $ | 10,507 |  |  | $ | 11,090 |
Less current maturities of debt | 1,103 |  |  | 859 |
Total long-term debt | $ | 9,404 |  |  | $ | 10,231 |
| March 2020 |  | December 2019
Unamortized debt issuance costs | $ | 56 |  |  | $ | 58 |
Available secured borrowing capacity | $ | 1,403 |  |  | $ | 1,403 |
Fair value of senior unsecured notes | $ | 10,904 |  |  | $ | 11,910 |

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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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