Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 654		$ 654
Operating lease liability	685		685
Financing lease liability	93		93
Operating lease expense	53	$ 41	102	$ 79
Amortization of financing lease right-of-use assets	2	1	6	2
Interest expense on financing lease liabilities	2	1	4	2
Property, plant and equipment, net	4,630		4,630			$ 4,688
Energy Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	47		47		$ 56
Operating lease liability	$ 46		$ 46		56
Operating lease weighted average lease term, lessee	4 years 2 months 12 days		4 years 2 months 12 days
Operating lease weighted average discount rate, lessee (percent)	5.90%		5.90%
Financing lease right-of-use asset					26
Financing lease liability					23
Property, plant and equipment, net	$ 2,950		$ 2,950			3,027
Automotive Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	541		541		589
Operating lease liability	$ 569		$ 569		621
Operating lease weighted average lease term, lessee	5 years 6 months		5 years 6 months
Operating lease weighted average discount rate, lessee (percent)	5.60%		5.60%
Financing lease right-of-use asset					24
Financing lease liability					27
Property, plant and equipment, net	$ 939		$ 939			941
Food Packaging Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	33		33		35
Operating lease liability	$ 37		$ 37		39
Operating lease weighted average lease term, lessee	13 years		13 years
Operating lease weighted average discount rate, lessee (percent)	7.30%		7.30%
Financing lease right-of-use asset					1
Financing lease liability					$ 1
Property, plant and equipment, net	$ 166		$ 166			169
Other Segments and Holding Company
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	33		33
Operating lease liability	33		33
Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	382		382			367
Operating lease rental revenue	8	$ 11	16	$ 21
Operating lease minimum lease payments to be received in remainder of 2019	17		17
Operating lease minimum lease payments to be received in 2020	33		33
Operating lease minimum lease payments to be received after 2020	10		10
Assets leased to others | Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	220		220			217
Other assets
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	654		654			0
Accrued expenses and other liabilities
Lessee, Lease, Description [Line Items]
Operating lease liability	685		685			0
Property, plant and equipment, net
Lessee, Lease, Description [Line Items]
Financing lease right-of-use asset	79		79			51
Debt
Lessee, Lease, Description [Line Items]
Financing lease liability	$ 93		$ 93			$ 51