Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Leases [Line Items]
Operating lease liability	$ 647
Finance Lease, Liability	93
Operating Lease, Expense	202
Finance Lease, Right-of-Use Asset, Amortization	13
Finance Lease, Interest Expense	7
Operating Leases, Rent Expense		$ 168	$ 155
Property, plant and equipment, net	4,541	4,688
Other assets
Leases [Line Items]
Operating lease right-of-use asset	622	0
Accrued expenses and other liabilities
Leases [Line Items]
Operating lease liability	647	0
Property, plant and equipment
Leases [Line Items]
Finance lease right-of-use asset	77	41
Debt
Leases [Line Items]
Finance Lease, Liability	93	52
Real Estate Segment
Leases [Line Items]
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	33
Lessor, Operating Lease, Payments to be Received, Two Years	6
Lessor, operating leases, payments to be received, after year two	3
Operating Leases, Income Statement, Lease Revenue	33	39	$ 44
Property, plant and equipment, net	386	367
Real Estate Segment | Assets leased to others
Leases [Line Items]
Property, plant and equipment, net	$ 220	217
Energy Segment
Leases [Line Items]
Operating lease right-of-use asset				$ 56
Operating lease liability				56
Finance Lease, Liability				23
Finance lease right-of-use asset				26
Lessee, Operating Lease, Term of Contract	3 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	5.60%
Property, plant and equipment, net	$ 2,888	3,027
Energy Segment | Other assets
Leases [Line Items]
Operating lease right-of-use asset	48
Energy Segment | Accrued expenses and other liabilities
Leases [Line Items]
Operating lease liability	$ 48
Automotive Segment
Leases [Line Items]
Operating lease right-of-use asset				589
Operating lease liability				621
Finance Lease, Liability				22
Finance lease right-of-use asset				20
Lessee, Operating Lease, Term of Contract	5 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	5.70%
Property, plant and equipment, net	$ 916	941
Automotive Segment | Other assets
Leases [Line Items]
Operating lease right-of-use asset	501
Automotive Segment | Accrued expenses and other liabilities
Leases [Line Items]
Operating lease liability	$ 527
Food Packaging Segment
Leases [Line Items]
Operating lease right-of-use asset				35
Operating lease liability				39
Lessee, Operating Lease, Term of Contract	11 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	7.40%
Property, plant and equipment, net	$ 161	$ 169
Food Packaging Segment | Other assets
Leases [Line Items]
Operating lease right-of-use asset	34
Food Packaging Segment | Accrued expenses and other liabilities
Leases [Line Items]
Operating lease liability	38
Other Segments and Holding Company
Leases [Line Items]
Operating lease right-of-use asset				34
Operating lease liability				$ 28
Other Segments and Holding Company | Other assets
Leases [Line Items]
Operating lease right-of-use asset	39
Other Segments and Holding Company | Accrued expenses and other liabilities
Leases [Line Items]
Operating lease liability	$ 34