Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 678
Operating lease liability	708
Financing lease liability	95
Operating lease expense	49	$ 38
Amortization of financing lease right-of-use assets	4	1
Interest expense on financing lease liabilities	2	0
Property, plant and equipment, net	4,682			$ 4,688
Energy Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	51		$ 56
Operating lease liability	$ 50		56
Lessee, Operating Lease, Term of Contract	4 years
Operating lease weighted average discount rate (percent)	5.80%
Financing lease right-of-use asset			26
Financing lease liability			23
Property, plant and equipment, net	$ 3,004			3,027
Automotive Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	560		589
Operating lease liability	$ 591		621
Lessee, Operating Lease, Term of Contract	5 years 7 months 6 days
Operating lease weighted average discount rate (percent)	5.60%
Financing lease right-of-use asset			24
Financing lease liability			27
Property, plant and equipment, net	$ 951			941
Food Packaging Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	41		42
Operating lease liability	$ 41		42
Lessee, Operating Lease, Term of Contract	10 years 6 months
Operating lease weighted average discount rate (percent)	6.10%
Financing lease right-of-use asset			1
Financing lease liability			$ 1
Property, plant and equipment, net	$ 168			169
Other Segments and Holding Company
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	26
Operating lease liability	26
Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	376			367
Operating lease rental revenue	8	$ 10
Operating lease minimum lease payments to be received in remainder of 2019	25
Operating lease minimum lease payments to be received in 2020	33
Operating lease minimum lease payments to be received after 2020	10
Assets leased to others | Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	219			217
Other assets
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	678			0
Accrued expenses and other liabilities
Lessee, Lease, Description [Line Items]
Operating lease liability	708			0
Property, plant and equipment, net
Lessee, Lease, Description [Line Items]
Financing lease right-of-use asset	81			51
Debt
Lessee, Lease, Description [Line Items]
Financing lease liability	$ 95			$ 54