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v3.7.0.1

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Cash flows from operating activities: |  |
Net income | $ 321 | $ 513
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 500 | 485
Lower of cost or market inventory valuation adjustment | 0 | (293)
Deferred income tax expense (benefit) | (4) | 121
Changes in current assets and current liabilities | 151 | (177)
Changes in deferred charges and credits and other operating activities, net | 20 | (9)
Net cash provided by operating activities | 988 | 640
Cash flows from investing activities: |  |
Capital expenditures | (279) | (316)
Deferred turnaround and catalyst costs | (245) | (161)
Investments in joint ventures | (117) | (2)
Acquisition of undivided interest in crude system assets | (72) | 0
Other investing activities, net | (1) | (2)
Net cash used in investing activities | (714) | (481)
Cash flows from financing activities: |  |
Repayments of debt and capital lease obligations | (5) | (3)
Purchase of common stock for treasury | (314) | (265)
Common stock dividends | (315) | (282)
Proceeds from issuance of Valero Energy Partners LP common units | 35 | 0
Distributions to noncontrolling interests (public unitholders) of Valero Energy Partners LP | (9) | (7)
Distributions to other noncontrolling interests | (25) | 0
Other financing activities, net | (19) | 13
Net cash used in financing activities | (652) | (544)
Effect of foreign exchange rate changes on cash | 25 | 49
Net decrease in cash and temporary cash investments | (353) | (336)
Cash and temporary cash investments at beginning of period | 4,816 | 4,114
Cash and temporary cash investments at end of period | $ 4,463 | $ 3,778

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