Leases, Total Lease Cost by Class of Underlying Asset (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finance lease cost:
Amortization of ROU assets	$ 246	$ 218	$ 167
Interest on lease liabilities	107	84	72
Lease cost:
Operating lease cost	418	379	381
Variable lease cost	183	138	79
Short-term lease cost	257	157	96
Sublease income	(31)	(29)	(7)
Total lease cost	1,180	947	788
Pipelines, Terminals, and Tanks [Member]
Finance lease cost:
Amortization of ROU assets	213	183	137
Interest on lease liabilities	101	78	66
Lease cost:
Operating lease cost	166	171	163
Variable lease cost	114	79	51
Short-term lease cost	18	15	5
Sublease income	0	0	0
Total lease cost	612	526	422
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	127	102	105
Variable lease cost	61	50	21
Short-term lease cost	125	82	44
Sublease income	(29)	(27)	(4)
Total lease cost	284	207	166
Railroad Transportation Equipment [Member]
Finance lease cost:
Amortization of ROU assets	3	3	2
Interest on lease liabilities	1	1	1
Lease cost:
Operating lease cost	80	68	64
Variable lease cost	0	0	0
Short-term lease cost	2	3	1
Sublease income	0	0	0
Total lease cost	86	75	68
Other Assets [Member]
Finance lease cost:
Amortization of ROU assets	30	32	28
Interest on lease liabilities	5	5	5
Lease cost:
Operating lease cost	45	38	49
Variable lease cost	8	9	7
Short-term lease cost	112	57	46
Sublease income	(2)	(2)	(3)
Total lease cost	$ 198	$ 139	$ 132