Debt Debt Table (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt	$ 8,192	$ 7,326
Holding Company
Debt Instrument [Line Items]
Debt	6,297	5,505
Holding Company | 6.000% senior unsecured notes due 2020
Debt Instrument [Line Items]
Debt	0	1,702
Holding Company | 5.875% senior unsecured notes due 2022
Debt Instrument [Line Items]
Debt	1,345	1,344
Holding Company | 6.250% senior unsecured notes due 2022
Debt Instrument [Line Items]
Debt	1,211	1,213
Holding Company | 6.750% senior unsecured notes due 2024
Debt Instrument [Line Items]
Debt	498	498
Holding Company | 4.750% senior unsecured notes due 2024
Debt Instrument [Line Items]
Debt	498	0
Holding Company | 6.375% senior unsecured notes due 2025
Debt Instrument [Line Items]
Debt	748	748
Holding Company | 6.250% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt	1,250	0
Holding Company | 5.250% senior unsecured notes due 2027
Debt Instrument [Line Items]
Debt	747	0
Energy Segment
Debt Instrument [Line Items]
Debt	1,195	1,170
Automotive Segment
Debt Instrument [Line Items]
Debt	405	372
Food Packaging Segment
Debt Instrument [Line Items]
Debt	268	273
Metals Segment
Debt Instrument [Line Items]
Debt	7	0
Real Estate Segment
Debt Instrument [Line Items]
Debt	2	2
Home Fashion Segment
Debt Instrument [Line Items]
Debt	18	4
Reporting Segments
Debt Instrument [Line Items]
Debt	$ 1,895	$ 1,821