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Consolidated Statement of Cash Flows (U.S. GAAP) (CAD) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Operating activities |  |  |  |  |  |
Net income | 2,828 |  | 3,766 |  | 3,371 |
Adjustments for non-cash items: |  |  |  |  |  |
Depreciation and depletion | 1,110 | [1] | 761 | [1] | 764 | [1]
(Gain)/loss on asset sales | (150) | [2] | (94) | [2] | (197) | [2]
Deferred income taxes and other | 482 |  | 619 |  | 71 |
Changes in operating assets and liabilities: |  |  |  |  |  |
Accounts receivable | (74) |  | 300 |  | (302) |
Inventories, materials, supplies and prepaid expenses | (260) |  | (106) |  | (228) |
Income taxes payable | (457) |  | (84) |  | 390 |
Accounts payable and accrued liabilities | 191 |  | (67) |  | 846 |
All other items - net | (378) | [3] | (415) | [3] | (226) | [3]
Cash flows from (used in) operating activities | 3,292 |  | 4,680 |  | 4,489 |
Investing activities |  |  |  |  |  |
Additions to property, plant and equipment | (6,297) |  | (5,478) |  | (3,919) |
Acquisition (note 18) | (1,602) |  |  |  |  |
Proceeds from asset sales | 160 |  | 226 |  | 314 |
Repayment of loan from equity company | 4 |  | 14 |  | 12 |
Cash flows from (used in) investing activities | (7,735) |  | (5,238) |  | (3,593) |
Financing activities |  |  |  |  |  |
Short-term debt - net | 1,371 |  | 105 |  | 135 |
Long-term debt issued | 3,276 |  | 220 |  | 320 |
Reduction in capitalized lease obligations | (7) |  | (4) |  | (3) |
Issuance of common shares under stock option plan |  |  | 43 |  | 19 |
Common shares purchased (note 10) |  |  | (128) |  | (59) |
Dividends paid | (407) |  | (398) |  | (373) |
Cash flows from (used in) financing activities | 4,233 |  | (162) |  | 39 |
Increase (decrease) in cash | (210) |  | (720) |  | 935 |
Cash at beginning of year | 482 | [4] | 1,202 | [4] | 267 |
Cash at end of year | 272 | [4] | 482 | [4] | 1,202 | [4]
[1] | A 2013 charge in the Downstream segment of $377 million ($280 million, after-tax) associated with the company's decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $132 million, reported as part of production and manufacturing expenses. By the end of 2013, amounts incurred associated with decommissioning, environmental and employee-related costs totalled $40 million.
[2] | 2013 included a gain of $85 million ($73 million after tax) for the sale of non-operating assets.
[3] | Includes contribution to registered pension plans of $600 million (2012 - $594 million, 2011 - $361 million).
[4] | Cash is composed of cash in bank and cash equivalents at cost. Cash equivalents are all highly liquid securities with maturity of three months or less when purchased.

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