Leases, Total Lease Cost by Class of Underlying Asset (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Finance lease cost:
Amortization of ROU assets	$ 337	$ 283	$ 246
Interest on lease liabilities	112	116	107
Lease cost:
Operating lease cost	517	508	418
Variable lease cost	141	160	183
Short-term lease cost	431	360	257
Sublease income	(25)	(35)	(31)
Total lease cost	1,513	1,392	1,180
Pipelines, Terminals, and Tanks [Member]
Finance lease cost:
Amortization of ROU assets	303	247	213
Interest on lease liabilities	103	107	101
Lease cost:
Operating lease cost	186	167	166
Variable lease cost	102	114	114
Short-term lease cost	16	27	18
Sublease income	0	0	0
Total lease cost	710	662	612
Maritime Equipment [Member]
Finance lease cost:
Amortization of ROU assets	0	0	0
Interest on lease liabilities	0	0	0
Lease cost:
Operating lease cost	200	210	127
Variable lease cost	29	36	61
Short-term lease cost	291	196	125
Sublease income	(23)	(33)	(29)
Total lease cost	497	409	284
Railroad Transportation Equipment [Member]
Finance lease cost:
Amortization of ROU assets	3	3	3
Interest on lease liabilities	1	0	1
Lease cost:
Operating lease cost	89	89	80
Variable lease cost	1	0	0
Short-term lease cost	3	3	2
Sublease income	0	0	0
Total lease cost	97	95	86
Other Assets [Member]
Finance lease cost:
Amortization of ROU assets	31	33	30
Interest on lease liabilities	8	9	5
Lease cost:
Operating lease cost	42	42	45
Variable lease cost	9	10	8
Short-term lease cost	121	134	112
Sublease income	(2)	(2)	(2)
Total lease cost	$ 209	$ 226	$ 198