Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Leases
Operating lease right-of-use asset	$ 476	$ 527
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Operating lease liabilities	$ 484	$ 530
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued Liabilities	Accrued Liabilities
Finance lease right-of-use assets	$ 79	$ 72
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance lease liabilities	$ 88	$ 83
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Debt and Lease Obligation	Debt and Lease Obligation
Operating lease cost	$ 180	$ 178	$ 177
Amortization of financing lease right-of-use assets	9	8	8
Interest expense on financing lease liabilities	7	6	5
Property, plant and equipment, net	3,670	3,843
Energy
Leases
Operating lease right-of-use asset	69	75
Operating lease liabilities	$ 64	$ 71
Lease term	5 years 1 month 6 days	5 years 4 months 24 days
Operating lease, discount rate percentage	8.10%	7.90%
Property, plant and equipment, net	$ 2,333	$ 2,504
Automotive
Leases
Operating lease right-of-use asset	363	409
Operating lease liabilities	$ 380	$ 421
Lease term	5 years	5 years 4 months 24 days
Operating lease, discount rate percentage	5.90%	5.90%
Operating lease cost	$ 137	$ 141	143
Operating lease expense	78	97	99
Revenues from operating leases	$ 35	$ 60	$ 56
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Revenue	Other Operating Revenue	Other Operating Revenue
2026	$ 16
2027	16
2028	15
2029	14
2030	14
2031	30
Thereafter	30
Property, plant and equipment, net	351	$ 808
Food Packaging
Leases
Operating lease right-of-use asset	20	19
Operating lease liabilities	$ 22	$ 22
Lease term	7 years 7 months 6 days	9 years 1 month 6 days
Operating lease, discount rate percentage	7.50%	7.40%
Property, plant and equipment, net	$ 141	$ 124
Other Segments and Holding Company
Leases
Operating lease right-of-use asset	24	24
Operating lease liabilities	18	16
Real Estate Segment
Leases
Revenues from operating leases	$ 14	$ 10	$ 17
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Revenue	Other Operating Revenue	Other Operating Revenue
2026	$ 15
2027	15
2028	16
2029	16
2030	16
2031	32
Thereafter	32
Property, plant and equipment, net	787	$ 350
Real Estate Segment | Assets leased to others
Leases
Property, plant and equipment, net	$ 484	$ 236