Leases, Total Lease Cost by Class of Underlying Asset (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance lease cost:
Amortization of ROU assets	$ 167	$ 128	$ 54
Interest on lease liabilities	72	98	50
Lease cost:
Operating lease cost	381	434	439
Variable lease cost	79	99	103
Short-term lease cost	96	91	91
Sublease income	(7)	(12)	(30)
Total lease cost	788	838	707
Pipelines, Terminals, and Tanks [Member]
Finance lease cost:
Amortization of ROU assets	137	109	44
Interest on lease liabilities	66	92	47
Lease cost:
Operating lease cost	163	165	182
Variable lease cost	51	53	66
Short-term lease cost	5	9	9
Sublease income	0	0	0
Total lease cost	422	428	348
Transportation, Marine [Member]
Finance lease cost:
Amortization of ROU assets	0	0	0
Interest on lease liabilities	0	0	0
Lease cost:
Operating lease cost	105	156	145
Variable lease cost	21	40	35
Short-term lease cost	44	45	53
Sublease income	(4)	(10)	(27)
Total lease cost	166	231	206
Transportation, Rail [Member]
Finance lease cost:
Amortization of ROU assets	2	2	0
Interest on lease liabilities	1	0	0
Lease cost:
Operating lease cost	64	61	52
Variable lease cost	0	1	0
Short-term lease cost	1	0	0
Sublease income	0	0	0
Total lease cost	68	64	52
Feedstock Processing Equipment [Member]
Finance lease cost:
Amortization of ROU assets	19	13	7
Interest on lease liabilities	3	3	1
Lease cost:
Operating lease cost	12	15	20
Variable lease cost	2	3	1
Short-term lease cost	46	37	29
Sublease income	0	0	0
Total lease cost	82	71	58
Energy and Gases [Member]
Finance lease cost:
Amortization of ROU assets	4	4	3
Interest on lease liabilities	2	3	2
Lease cost:
Operating lease cost	8	7	9
Variable lease cost	0	0	0
Short-term lease cost	0	0	0
Sublease income	0	0	0
Total lease cost	14	14	14
Real Estate [Member]
Finance lease cost:
Amortization of ROU assets	0	0	0
Interest on lease liabilities	0	0	0
Lease cost:
Operating lease cost	26	26	27
Variable lease cost	2	2	1
Short-term lease cost	0	0	0
Sublease income	(3)	(2)	(3)
Total lease cost	25	26	25
Other [Member]
Finance lease cost:
Amortization of ROU assets	5	0	0
Interest on lease liabilities	0	0	0
Lease cost:
Operating lease cost	3	4	4
Variable lease cost	3	0	0
Short-term lease cost	0	0	0
Sublease income	0	0	0
Total lease cost	$ 11	$ 4	$ 4