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Committments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Loss Contingencies by Contingency [Table Text Block] | maintain reserves for various contingent liabilities as follows:
| December 31,
| 2020 |  | 2019
Environmental reserves | $ | 14 |  |  | $ | 10 |
Other reserves | — |  |  | — |
Total contingencies | 14 |  |  | 10 |
Current portion | (1) |  |  | (2) |
Long-term portion | $ | 13 |  |  | $ | 8 |
Schedule of Environmental Loss Contingencies by Site [Table Text Block] | The activity in our reserve for estimated environmental loss contingency reserves is summarized in the following table.
| Year ended December 31,
| 2020 |  | 2019 |  |
Beginning balance | $ | 10 |  |  | $ | 11 |  |  |
Adjustments to expense during the year | 2 |  |  | 1 |  |  |
Adjustments to amounts to be paid be paid by a third party | 2 |  |  | — |  |  |
Payments made | (1) |  |  | (1) |  |  |
Ending balance | $ | 13 |  |  | $ | 10 |  |  |

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