Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (1,754)	$ 167
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense	582	551
LCM inventory valuation adjustment	2,542	0
Deferred income tax benefit	(162)	(22)
Changes in current assets and current liabilities	(1,107)	130
Changes in deferred charges and credits and other operating activities, net	(150)	51
Net cash provided by (used in) operating activities	(49)	877
Cash flows from investing activities:
Investments in unconsolidated joint ventures	(19)	(63)
Other investing activities, net	10	(2)
Net cash used in investing activities	(757)	(747)
Cash flows from financing activities:
Purchases of common stock for treasury	(147)	(36)
Common stock dividends	(401)	(375)
Acquisition of VLP publicly held common units	0	(950)
Other financing activities, net	(1)	(25)
Net cash used in financing activities	(195)	(378)
Effect of foreign exchange rate changes on cash	(67)	43
Net decrease in cash and cash equivalents	(1,068)	(205)
Cash and cash equivalents at beginning of period	2,583	2,982
Cash and cash equivalents at end of period	1,515	2,777
Excluding Variable Interest Entities (VIEs) [Member]
Cash flows from investing activities:
Capital expenditures	(299)	(431)
Deferred turnaround and catalyst cost expenditures	(309)	(219)
Cash flows from financing activities:
Proceeds from debt issuances and borrowings	300	1,892
Repayments of debt and finance lease obligations	(15)	(906)
Variable Interest Entities (VIEs) [Member]
Cash flows from financing activities:
Proceeds from debt issuances and borrowings	70	23
Repayments of debt and finance lease obligations	(1)	(1)
Diamond Green Diesel Holdings LLC (DGD) [Member]
Cash flows from investing activities:
Capital expenditures	(74)	(13)
Deferred turnaround and catalyst cost expenditures	(4)	0
Other VIEs [Member]
Cash flows from investing activities:
Capital expenditures	$ (62)	$ (19)