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SUPPLEMENTAL CASH FLOW INFORMATION | 12 Months Ended
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Dec. 31, 2021
Cash Flow Statement [Abstract] |
SUPPLEMENTAL CASH FLOW INFORMATION | SUPPLEMENTAL CASH FLOW INFORMATION
|  | For the year ended December 31,
US$ MILLIONS |  | 2021 |  | 2020 |  | 2019
Interest paid |  | $ | 1,074 |  |  | $ | 985 |  |  | $ | 829 |
Income taxes paid |  | $ | 262 |  |  | $ | 172 |  |  | $ | 179 |
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 |  | 2021 |  | 2020 |  | 2019
Accounts receivable |  | $ | (190) |  |  | $ | 284 |  |  | $ | 42 |
Prepayments |  | (11) |  |  | (415) |  |  | (120) |
Accounts payable and other |  | (323) |  |  | (89) |  |  | 146 |
Changes in non-cash working capital, net(1) |  | $ | (524) |  |  | $ | (220) |  |  | $ | 68 |
(1)During the year ended December 31, 2021, changes in non-cash working capital include a $0.3 billion, (2020: $0.3 billion, 2019: $nil) reduction to cash related to the impact of finance lease receivables signed at our North American residential energy infrastructure operation. The operation presents an outflow for the cost of inventory within the operating cash flows, and given the business has been securitized since 2019, the corresponding cash outflows are more than offset by increases in non-recourse borrowings under financing activities on the Consolidated Statements of Cash Flows.

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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 2021-01-01 -Section Presentation of a statement of cash flows -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&doctype=Standard&dita_xref=IAS07_g10-17_TI -URIDate 2021-03-24 + Details
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