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Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flows from operating activities: |  |
Net income | $ 1,330 | $ 3,146
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 695 | 660
Gain on early retirement of debt, net | 0 | (11)
Deferred income tax expense (benefit) | (69) | 54
Changes in current assets and current liabilities | (160) | (534)
Changes in deferred charges and credits and other operating activities, net | 50 | (145)
Net cash provided by operating activities | 1,846 | 3,170
Cash flows from investing activities: |  |
Purchases of available-for-sale (AFS) debt securities | (11) | (100)
Proceeds from sales and maturities of AFS debt securities | 33 | 71
Other investing activities, net | 2 | 4
Net cash used in investing activities | (637) | (549)
Cash flows from financing activities: |  |
Premiums paid on early retirement of debt | 0 | (5)
Purchases of common stock for treasury | (1,023) | (1,451)
Common stock dividend payments | (356) | (379)
Contributions from noncontrolling interests | 90 | 75
Other financing activities, net | 0 | (1)
Net cash used in financing activities | (1,644) | (1,998)
Effect of foreign exchange rate changes on cash | (72) | 36
Net increase (decrease) in cash and cash equivalents | (507) | 659
Cash and cash equivalents at beginning of period | 5,424 | 4,862
Cash and cash equivalents at end of period | 4,917 | 5,521
Excluding Variable Interest Entities (VIEs) [Member] |  |
Cash flows from investing activities: |  |
Capital expenditures | (128) | (175)
Deferred turnaround and catalyst cost expenditures | (452) | (235)
Cash flows from financing activities: |  |
Proceeds from debt borrowings | 1,250 | 750
Repayments of debt and finance lease obligations | (1,467) | (973)
Diamond Green Diesel Holdings LLC (DGD) [Member] |  |
Cash flows from investing activities: |  |
Capital expenditures | (69) | (90)
Deferred turnaround and catalyst cost expenditures | (9) | (24)
Cash flows from financing activities: |  |
Proceeds from debt borrowings | 100 | 150
Repayments of debt and finance lease obligations | (256) | (156)
Other VIEs [Member] |  |
Cash flows from investing activities: |  |
Capital expenditures | (3) | 0
Cash flows from financing activities: |  |
Proceeds from borrowings of other VIEs | 20 | 14
Repayments of debt and finance lease obligations | $ (2) | $ (22)

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