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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities: |  |  |
Net income | $ 2,080 | $ 2,089 | $ 324
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization expense | 1,574 | 1,534 | 1,473
Asset impairment losses | 1,014 | 0 | 2
Loss on shutdown and sales of refinery assets, net | 0 | 12 | 888
Gain on sale of investment in Cameron Highway Oil Pipeline Company | 0 | 0 | (55)
Stock-based compensation expense | 58 | 58 | 54
Deferred income tax expense | 963 | 461 | 347
Changes in current assets and current liabilities | (302) | 81 | 68
Changes in deferred charges and credits and other operating activities, net | (117) | (197) | (56)
Net cash provided by operating activities | 5,270 | 4,038 | 3,045
Cash flows from investing activities: |  |  |
Capital expenditures | (2,931) | (2,355) | (1,730)
Deferred turnaround and catalyst costs | (479) | (629) | (535)
Acquisition of Pembroke Refinery, net of cash acquired | 0 | (1,691) | 0
Acquisition of Meraux Refinery | 0 | (547) | 0
Acquisitions of ethanol plants | 0 | 0 | (260)
Minor acquisitions | (80) | (37) | 0
Proceeds from the sale of investment in Cameron Highway Oil Pipeline Company | 0 | 0 | 330
Other investing activities, net | (21) | (39) | 23
Net cash used in investing activities | (3,351) | (5,298) | (1,405)
Non-bank debt: |  |  |
Borrowings | 300 | 0 | 1,544
Repayments | (862) | (774) | (517)
Bank credit agreements: |  |  |
Borrowings | 1,100 | 0 | 0
Repayments | (1,100) | (4) | 0
Accounts receivable sales program: |  |  |
Proceeds from the sale of receivables | 1,500 | 150 | 1,225
Repayments | (1,650) | 0 | (1,325)
Proceeds from the exercise of stock options | 59 | 49 | 20
Purchase of common stock for treasury | (281) | (349) | (13)
Common stock dividends | (360) | (169) | (114)
Contributions from noncontrolling interest | 44 | 22 | 0
Other financing activities, net | 17 | 9 | (4)
Net cash provided by (used in) financing activities | (1,233) | (1,066) | 816
Effect of foreign exchange rate changes on cash | 13 | 16 | 53
Net increase (decrease) in cash and temporary cash investments | 699 | (2,310) | 2,509
Cash and temporary cash investments at beginning of year | 1,024 | 3,334 | 825
Cash and temporary cash investments at end of year | $ 1,723 | $ 1,024 | $ 3,334

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- Definition Cash outflow in the form of ordinary dividends to common shareholders, generally out of earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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- Definition The cash inflow from the sale of investment projects held by an entity in hopes of getting a future return or interest from it. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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