Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net income (loss)		$ 1,322	$ (652)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense		840	691
Asset impairment loss		0	1,131
Deferred income tax benefit		(397)	(324)
Changes in operating assets and liabilities:
Current assets and current liabilities (see Note 11)		(303)	157
Deferred charges and other assets		(41)	(74)
Long-term liabilities		(82)	3
Other operating activities, net		51	20
Net cash provided by operating activities		1,390	952
Cash flows from investing activities:
Investments in nonconsolidated joint ventures		0	(1)
Other investing activities, net		48	25
Net cash used in investing activities		(400)	(635)
Cash flows from financing activities:
Purchases of common stock for treasury		(573)	(274)
Common stock dividend payments		(359)	(356)
Contributions from noncontrolling interests		190	0
Distributions to noncontrolling interests		0	(129)
Other financing activities, net		(9)	(6)
Net cash provided by (used in) financing activities		124	(382)
Effect of foreign exchange rate changes on cash		(67)	43
Net increase (decrease) in cash, cash equivalents, and restricted cash		1,047	(22)
Cash, cash equivalents, and restricted cash at beginning of period	[1]	4,865	4,829
Cash, cash equivalents, and restricted cash at end of period	[1]	5,912	4,807
Excluding Variable Interest Entities (VIEs) [Member]
Cash flows from investing activities:
Capital expenditures		(160)	(189)
Deferred turnaround and catalyst cost expenditures		(254)	(374)
Cash flows from financing activities:
Proceeds from debt issuances and borrowings		2,700	2,449
Repayments of debt and finance lease obligations		(1,904)	(2,047)
Diamond Green Diesel Holdings LLC (DGD) [Member]
Cash flows from investing activities:
Capital expenditures		(4)	(59)
Deferred turnaround and catalyst cost expenditures		(29)	(36)
Cash flows from financing activities:
Proceeds from debt issuances and borrowings		350	50
Repayments of debt and finance lease obligations		(257)	(57)
Other VIEs [Member]
Cash flows from investing activities:
Capital expenditures		(1)	(1)
Cash flows from financing activities:
Repayments of debt and finance lease obligations		$ (14)	$ (12)

[1] Restricted cash is included in prepaid expenses and other in our consolidated balance sheets.