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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities: |  |
Net earnings | $ 255 | $ 185
Provision for credit losses | 4 | 6
Deferred income taxes and tax uncertainties | (11) | (7)
Depreciation and amortization | 43 | 45
Impairment of goodwill, intangible and long-lived assets | 0 | 177
Net (gains) losses from sale or redemption of assets | (5) | 3
Stock-based compensation | 8 | 9
Subtotal | 39 | 233
Change in operating assets and liabilities: |  |
Accounts receivable | (121) | (217)
Inventories | 52 | 19
Prepaid expenses and other assets | (5) | (26)
Trade accounts payable | 85 | 155
Accrued liabilities | (61) | (36)
Income taxes, net | 55 | (62)
Other non-current liabilities | (5) | (7)
Subtotal | 0 | (174)
Net cash provided by operating activities | 294 | 244
Cash flows from investing activities: |  |
Additions to property, buildings, equipment and intangibles | (73) | (50)
Proceeds from sale or redemption of assets | 15 | 0
Other - net | 0 | (2)
Net cash used in investing activities | (58) | (52)
Cash flows from financing activities: |  |
Borrowings under lines of credit | 0 | 9
Payments against lines of credit | 0 | (45)
Proceeds from long-term debt | 0 | 1,500
Payments of long-term debt | 0 | (345)
Proceeds from stock options exercised | 8 | 19
Payments for employee taxes withheld from stock awards | (2) | (5)
Purchases of treasury stock | (175) | (100)
Cash dividends paid | (81) | (78)
Net cash (used in) provided by financing activities | (250) | 955
Exchange rate effect on cash and cash equivalents | (9) | (15)
Net change in cash and cash equivalents | (23) | 1,132
Cash and cash equivalents at beginning of year | 585 | 360
Cash and cash equivalents at end of period | $ 562 | $ 1,492

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