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Consolidated Statements Of Cash Flows - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Activities |  |  |
Net income | $ 6,523 | $ 5,349 | $ 5,919
Adjustments to reconcile net income to cash provided by operating activities: |  |  |
Depreciation | 2,208 | 2,210 | 2,216
Deferred and other income taxes | 154 | 340 | 566
Gain on non-operating asset dispositions | (98) | (115) | (20)
Other operating activities, net | 42 | 490 | 98
Changes in current assets and liabilities: |  |  |
Accounts receivable, net | (217) | 90 | 160
Materials and supplies | 17 | 113 | (9)
Other current assets | 31 | (34) | 87
Accounts payable and other current liabilities | 184 | (73) | (179)
Income and other taxes | 188 | 170 | (229)
Cash provided by operating activities | 9,032 | 8,540 | 8,609
Investing Activities |  |  |
Capital investments | (2,936) | (2,927) | (3,453)
Proceeds from asset sales | 178 | 149 | 74
Maturities of short-term investments (Note 13) | 94 | 141 | 130
Purchases of short-term investments (Note 13) | (70) | (136) | (115)
Other investing activities, net | 25 | 97 | (71)
Cash used in investing activities | (2,709) | (2,676) | (3,435)
Financing Activities |  |  |
Share repurchase programs (Note 18) | (7,291) | (3,705) | (5,804)
Debt issued (Note 14) | 4,201 | 4,004 | 3,986
Dividends paid | (2,800) | (2,626) | (2,598)
Debt repaid | (1,299) | (2,053) | (817)
Net issued/(paid) commercial paper (Note 14) | 325 | (127) | (6)
Debt exchange (Note 14) | (270) | (328) | (387)
Other financing activities, net | (24) | (67) | (20)
Cash used in financing activities | (7,158) | (4,902) | (5,646)
Net change in cash, cash equivalents, and restricted cash | (835) | 962 | (472)
Cash, cash equivalents, and restricted cash at beginning of year | 1,818 | 856 | 1,328
Cash, cash equivalents, and restricted cash at end of year | 983 | 1,818 | 856
Non-cash investing and financing activities: |  |  |
Term loan renewals (Note 14) | 100 | 250 | 250
Capital investments accrued but not yet paid | 263 | 166 | 224
Locomotives sold for material credits | 0 | 0 | 18
Cash paid during the year for: |  |  |
Income taxes, net of refunds | (1,658) | (1,214) | (1,382)
Interest, net of amounts capitalized | $ (1,087) | $ (1,050) | $ (1,033)

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