Leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 502		$ 502		$ 556
Operating lease liability	$ 515		$ 515		573
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued Liabilities	Accrued Liabilities	Accrued Liabilities	Accrued Liabilities
Operating lease expense	$ 49	$ 52	$ 150	$ 155
Amortization of financing lease right-of-use assets	3	3	8	9
Interest expense on financing lease liabilities	2	1	5	5
Property, plant and equipment, net	4,194		4,194		4,228
Energy Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	38		38		37
Operating lease liability	$ 38		$ 38		$ 38
Operating lease weighted average lease term, lessee	4 years 3 months 18 days		4 years 3 months 18 days		3 years 1 month 6 days
Operating lease weighted average discount rate, lessee (percent)	5.50%		5.50%		5.50%
Property, plant and equipment, net	$ 2,765		$ 2,765		$ 2,747
Automotive Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	387		387		436
Operating lease liability	$ 403		$ 403		$ 456
Operating lease weighted average lease term, lessee	4 years 4 months 24 days		4 years 4 months 24 days		4 years 7 months 6 days
Operating lease weighted average discount rate, lessee (percent)	5.80%		5.80%		5.70%
Operating lease expense			$ 127	129
Property, plant and equipment, net	$ 830		830		$ 857
Food Packaging Segment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	29		29		32
Operating lease liability	$ 32		$ 32		$ 35
Operating lease weighted average lease term, lessee	10 years 8 months 12 days		10 years 8 months 12 days		11 years 1 month 6 days
Operating lease weighted average discount rate, lessee (percent)	7.40%		7.40%		7.40%
Property, plant and equipment, net	$ 145		$ 145		$ 160
Other Segments and Holding Company
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	48		48		51
Operating lease liability	42		42		44
Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	309		309		310
Operating lease rental revenue	1	$ 8	7	$ 24
Assets leased to others | Real Estate Segment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	221		221		222
Other assets [Member]
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	502		502		556
Accrued expenses and other liabilities
Lessee, Lease, Description [Line Items]
Operating lease liability	$ 515		$ 515		$ 573
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued Liabilities		Accrued Liabilities		Accrued Liabilities
Property, plant and equipment, net [Member]
Lessee, Lease, Description [Line Items]
Financing lease right-of-use asset	$ 62		$ 62		$ 65
Debt
Lessee, Lease, Description [Line Items]
Financing lease liability	$ 79		$ 79		$ 81