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SUPPLEMENTAL CASH FLOW INFORMATION | 12 Months Ended
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Dec. 31, 2018
Cash Flow Statement [Abstract] |
SUPPLEMENTAL CASH FLOW INFORMATION | SUPPLEMENTAL CASH FLOW INFORMATION
|  | For the year ended December 31,
US$ MILLIONS |  | 2018 |  | 2017 |  | 2016
Interest paid |  | $ | 507 |  |  | $ | 451 |  |  | $ | 366 |
Income taxes paid |  | $ | 427 |  |  | $ | 132 |  |  | $ | 33 |
Amounts paid and received for interest were reflected as operating cash flows in the Consolidated Statements of Cash Flows. Interest paid is net of debt related hedges. Amounts paid for income taxes were reflected as either operating cash flows or investing cash flows in the Consolidated Statements of Cash Flows depending upon the nature of the underlying transaction. Details of “Changes in non-cash working capital, net” on the Consolidated Statements of Cash Flows are as follows:
|  | For the year ended December 31,
US$ MILLIONS |  | 2018 |  | 2017 |  | 2016
Accounts receivable |  | $ | 176 |  |  | $ | (31 | ) |  | $ | 31 |
Prepayments and other |  | 5 |  |  | 4 |  |  | 3 |
Accounts payable and other |  | (305 | ) |  | 158 |  |  | 11 |
Changes in non-cash working capital, net |  | $ | (124 | ) |  | $ | 131 |  |  | $ | 45 |

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- Definition The entire disclosure for a statement of cash flows. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Section Presentation of a statement of cash flows -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=sect_Presentationofastatementofcashflows&doctype=Standard -URIDate 2017-03-09 + Details
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