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v3.5.0.2

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Cash flows from operating activities: |  |
Net income | $ 2,001 | $ 3,706
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 1,426 | 1,348
Lower of cost or market inventory valuation adjustment | (747) | 0
Asset impairment loss | 56 | 0
Deferred income tax expense | 193 | 77
Changes in current assets and current liabilities | 953 | 46
Changes in deferred charges and credits and other operating activities, net | (60) | (53)
Net cash provided by operating activities | 3,822 | 5,124
Cash flows from investing activities: |  |
Capital expenditures | (912) | (1,186)
Deferred turnaround and catalyst costs | (474) | (509)
Other investing activities, net | 2 | 16
Net cash used in investing activities | (1,384) | (1,679)
Cash flows from financing activities: |  |
Proceeds from debt issuances or borrowings | 1,653 | 1,446
Repayments of debt and capital lease obligations | (28) | (509)
Purchase of common stock for treasury | (1,167) | (2,071)
Common stock dividends | (840) | (608)
Contributions from noncontrolling interests | 0 | 4
Distributions to noncontrolling interests (public unitholders) of Valero Energy Partners LP | (22) | (14)
Distributions to other noncontrolling interest | (32) | (25)
Other financing activities, net | (143) | 50
Net cash used in financing activities | (579) | (1,727)
Effect of foreign exchange rate changes on cash | (24) | (106)
Net increase in cash and temporary cash investments | 1,835 | 1,612
Cash and temporary cash investments at beginning of period | 4,114 | 3,689
Cash and temporary cash investments at end of period | $ 5,949 | $ 5,301

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