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Debt (Tables) | 9 Months Ended
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Sep. 30, 2019
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt |
| September 30, 2019 |  | December 31, 2018
1.63% Convertible Notes, due 2019 | 403 |  |  | 403 |
6.150% Notes, due 2020 | 1,000 |  |  | 1,000 |
5.40% Notes due 2021 | 1,250 |  |  | 1,250 |
5.87% Notes, due 2022 | 627 |  |  | 627 |
5.125% Notes, due 2024 | 1,250 |  |  | 1,250 |
5.90% Notes, due 2027 | 625 |  |  | 625 |
6.75% Bonds, due 2028 | 300 |  |  | 300 |
5.95% Notes, due 2037 | 625 |  |  | 625 |
Iowa Finance Authority Loan, due 2042 | 250 |  |  | 250 |
Other(1) | (21 | ) |  | (29 | )
| 6,309 |  |  | 6,301 |
Less: amount due within one year | 1,404 |  |  | 405 |
Total long-term debt | $ | 4,905 |  |  | $ | 5,896 |
(1) | Includes various financing arrangements related to subsidiaries, unamortized debt discounts related to outstanding notes and bonds listed in the table above, an equity option related to the convertible notes due in 2019, and unamortized debt issuance costs.

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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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