Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 3,146	$ 967
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	660	606
Loss (gain) on early retirement of debt, net	(11)	50
Deferred income tax expense (benefit)	54	(234)
Changes in current assets and current liabilities	(534)	(722)
Changes in deferred charges and credits and other operating activities, net	(145)	(79)
Net cash provided by operating activities	3,170	588
Cash flows from investing activities:
Purchases of available-for-sale (AFS) debt securities	(100)	0
Proceeds from sales and maturities of AFS debt securities	71	0
Other investing activities, net	4	2
Net cash used in investing activities	(549)	(841)
Cash flows from financing activities:
Premiums paid on early retirement of debt	(5)	(48)
Purchases of common stock for treasury	(1,451)	(144)
Common stock dividend payments	(379)	(401)
Contributions from noncontrolling interests	75	165
Other financing activities, net	(1)	(10)
Net cash used in financing activities	(1,998)	(1,228)
Effect of foreign exchange rate changes on cash	36	(3)
Net increase (decrease) in cash and cash equivalents	659	(1,484)
Cash and cash equivalents at beginning of period	4,862	4,122
Cash and cash equivalents at end of period	5,521	2,638
Excluding Variable Interest Entities (VIEs) [Member]
Cash flows from investing activities:
Capital expenditures	(175)	(152)
Deferred turnaround and catalyst cost expenditures	(235)	(453)
Cash flows from financing activities:
Proceeds from debt issuances and borrowings	750	939
Repayments of debt and finance lease obligations	(973)	(1,738)
Diamond Green Diesel Holdings LLC (DGD) [Member]
Cash flows from investing activities:
Capital expenditures	(90)	(219)
Deferred turnaround and catalyst cost expenditures	(24)	(6)
Cash flows from financing activities:
Proceeds from debt issuances and borrowings	150	99
Repayments of debt and finance lease obligations	(156)	(102)
Other VIEs [Member]
Cash flows from investing activities:
Capital expenditures	0	(13)
Cash flows from financing activities:
Proceeds from borrowings of other VIEs	14	28
Repayments of debt and finance lease obligations	$ (22)	$ (16)