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
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%