Commitments and Contingent Liabilities- Schedule of Operating Leases (Details) $ in Millions	Sep. 30, 2025 USD ($)
Operating leases
ROU asset carrying value	$ 375
Lease liability carrying value	409
Finance leases
ROU asset carrying value	17
Lease liability carrying value	17
Total lease right of use asset	392
Total lease liability carrying value	$ 426
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Operating lease liability, current	$ 94
Operating lease, liability, noncurrent	$ 315
Lease liability, current, Consolidated Balance Sheet [Extensible Enumeration]	Other Liabilities, Current
Lease liability, noncurrent, Consolidated Balance Sheet [Extensible Enumeration]	Other Liabilities, Noncurrent
Finance lease, liability, current	$ 3
Finance lease, liability, noncurrent	$ 14
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent
Storage and pipeline facilities
Operating leases
ROU asset carrying value	$ 180
Lease liability carrying value	$ 178
Weighted-average remaining term	8 years
Weighted-average discount rate	4.50%
Transportation equipment
Operating leases
ROU asset carrying value	$ 34
Lease liability carrying value	$ 36
Weighted-average remaining term	3 years
Weighted-average discount rate	4.80%
Finance leases
ROU asset carrying value	$ 17
Lease liability carrying value	$ 17
Weighted- Average Remaining Term	4 years
Weighted average discount rate	4.80%
Office and warehouse space
Operating leases
ROU asset carrying value	$ 161
Lease liability carrying value	$ 195
Weighted-average remaining term	11 years
Weighted-average discount rate	3.30%