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Debt (Tables) | 12 Months Ended
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Dec. 31, 2016
Debt Disclosure [Abstract] |
Debt | Debt consists of (in millions):
|  | December 31, |
|  | 2016 |  |  | 2015 |
$500 million in Senior Notes, interest at 1.35% payable semiannually, principal due on December 1, 2017 |  |  | 499 |  |  |  | 498 |
$1.4 billion in Senior Notes, interest at 2.60% payable semiannually, principal due on December 1, 2022 |  |  | 1,391 |  |  |  | 1,389 |
$1.1 billion in Senior Notes, interest at 3.95% payable semiannually, principal due on December 1, 2042 |  |  | 1,087 |  |  |  | 1,087 |
Commercial paper |  |  | — |  |  |  | 890 |
Capital Leases and other debt |  |  | 237 |  |  |  | 45 |
Total debt |  |  | 3,214 |  |  |  | 3,909 |
Less current portion |  |  | 506 |  |  |  | 2 |
Long-term debt |  | $ | 2,708 |  |  | $ | 3,907 |
Principal Payments of Debt and Capital Leases | Principal payments of debt and capital leases for years subsequent to 2016 are as follows (in millions):
2017 |  | $ | 506 |
2018 |  |  | 3 |
2019 |  |  | 4 |
2020 |  |  | 5 |
2021 |  |  | 5 |
Thereafter |  |  | 2,691 |
|  | $ | 3,214 |

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