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Basis of Presentation (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
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Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Reclassification out of inventory | $ (252) |  | $ (373)
Reclassification to other long-term assets | $ 375 |  | $ 295
Reclassification Adjustment | Catalyst Inventory |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Reclassification out of inventory |  | $ 17 |
Reclassification to other long-term assets |  | $ 17 |

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