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Debt (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | May 31, 2019 | Dec. 31, 2017 | Jan. 31, 2017
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 8,059 |  | $ 8,192 |  |  |  |  |
Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 5,811 |  | 6,297 |  |  |  |  |
Energy Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 1,691 |  | 1,195 |  |  |  |  |
Automotive Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 368 |  | 405 |  |  |  |  |
Food Packaging Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 151 |  | 268 |  |  |  |  |
Metals Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 16 |  | 7 |  |  |  |  |
Real Estate Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 1 |  | 2 |  |  |  |  |
Home Fashion Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | 21 |  | 18 |  |  |  |  |
Reporting Segments |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 2,248 |  | 1,895 |  |  |  |  |
6.000% senior unsecured notes due 2020 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate on debt instrument |  |  |  |  | 6.00% | 6.00% |  |
5.875% senior unsecured notes due 2022 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt |  |  | 1,345 |  |  |  |  |
Interest rate on debt instrument | 5.875% |  |  |  |  |  |  |
6.250% senior unsecured notes due 2022 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 1,209 |  | 1,211 |  |  |  |  |
Interest rate on debt instrument | 6.25% |  |  |  |  |  | 6.25% | 6.25%
6.750% senior unsecured notes due 2024 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 499 |  | 498 |  |  |  |  |
Interest rate on debt instrument | 6.75% |  |  |  |  |  |  | 6.75%
4.750% senior unsecured notes due 2024 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 1,106 |  | 498 |  |  |  |  |
Interest rate on debt instrument | 4.75% | 4.75% |  | 4.75% |  |  |  |
6.375% senior unsecured notes due 2025 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 748 |  | 748 |  |  |  |  |
Interest rate on debt instrument | 6.375% |  |  |  |  |  | 6.375% |
6.250% senior unsecured notes due 2026 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 1,250 |  | 1,250 |  |  |  |  |
Interest rate on debt instrument | 6.25% |  |  |  | 6.25% | 6.25% |  |
5.250% senior unsecured notes due 2027 | Holding Company |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt | $ 999 |  | $ 747 |  |  |  |  |
Interest rate on debt instrument | 5.25% |  | 5.25% |  |  |  |  |
5.25% senior unsecured notes due 2025 | Energy Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate on debt instrument | 5.25% |  |  |  |  |  |  |
5.75% senior unsecured notes due 2028 | Energy Segment |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate on debt instrument | 5.75% |  |  |  |  |  |  |

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