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Segment and Geographic Reporting Geographic Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales/Other revenue from operations | $ 6,815 | $ 9,722 | $ 10,576
Other revenues from operations | 608 | 666 | 647
Property, plant and equipment, net | 4,228 | 4,454 |
United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales/Other revenue from operations | 6,462 | 9,271 | 10,170
Other revenues from operations | 604 | 652 | 629
Property, plant and equipment, net | 4,082 | 4,299 |
Other geographical locations |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales/Other revenue from operations | 353 | 451 | 406
Other revenues from operations | 4 | 14 | $ 18
Property, plant and equipment, net | $ 146 | $ 155 |

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