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Consolidated Statements of Cash Flows - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net income | $ 9,149 | $ 11,879 | $ 1,288
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization expense | 2,701 | 2,473 | 2,405
Loss (gain) on early redemption and retirement of debt, net | (11) | (14) | 193
Asset impairment loss | 0 | 61 | 0
Gain on sale of assets | 0 | 0 | (62)
Deferred income tax expense (benefit) | 103 | 50 | (126)
Changes in current assets and current liabilities | (2,326) | (1,626) | 2,225
Changes in deferred charges and credits and other operating activities, net | (387) | (249) | (64)
Net cash provided by operating activities | 9,229 | 12,574 | 5,859
Cash flows from investing activities: |  |  |
Purchases of available-for-sale (AFS) debt securities | (276) | (100) | 0
Proceeds from sales and maturities of AFS debt securities | 314 | 5 | 0
Proceeds from sale of assets | 0 | 32 | 270
Investments in nonconsolidated joint ventures | 0 | (1) | (9)
Other investing activities, net | 13 | (4) | 38
Net cash used in investing activities | (1,865) | (2,805) | (2,159)
Cash flows from financing activities: |  |  |
Premiums paid on early redemption and retirement of debt | (5) | (56) | (179)
Purchases of common stock for treasury | (5,136) | (4,577) | (27)
Common stock dividend payments | (1,452) | (1,562) | (1,602)
Contributions from noncontrolling interests | 75 | 265 | 189
Distributions to noncontrolling interests | (164) | (93) | (2)
Other financing activities, net | 3 | (16) | (18)
Net cash used in financing activities | (6,941) | (8,849) | (2,846)
Effect of foreign exchange rate changes on cash | 139 | (180) | (45)
Net increase in cash and cash equivalents | 562 | 740 | 809
Cash and cash equivalents at beginning of year | 4,862 | 4,122 | 3,313
Cash and cash equivalents at end of year | 5,424 | 4,862 | 4,122
Excluding Variable Interest Entities (VIEs) [Member] |  |  |
Cash flows from investing activities: |  |  |
Capital expenditures | (665) | (788) | (513)
Deferred turnaround and catalyst cost expenditures | (946) | (1,030) | (787)
Cash flows from financing activities: |  |  |
Proceeds from debt issuances and borrowings | 1,750 | 2,239 | 1,446
Repayments of debt and finance lease obligations | (2,125) | (5,067) | (2,849)
Diamond Green Diesel Holdings LLC (DGD) [Member] |  |  |
Cash flows from investing activities: |  |  |
Capital expenditures | (235) | (853) | (1,042)
Deferred turnaround and catalyst cost expenditures | (59) | (26) | (6)
Cash flows from financing activities: |  |  |
Proceeds from debt issuances and borrowings | 550 | 809 | 301
Repayments of debt and finance lease obligations | (480) | (823) | (180)
Other VIEs [Member] |  |  |
Cash flows from investing activities: |  |  |
Capital expenditures | (11) | (40) | (110)
Cash flows from financing activities: |  |  |
Proceeds from borrowings of other VIEs | 120 | 105 | 81
Repayments of debt and finance lease obligations | $ (77) | $ (73) | $ (6)

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