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Other Income and Expense (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Income and Expenses [Abstract] |
Components of Other Income | The components are summarized as follows (in millions):
Year Ended December 31, | 2017 |  | 2016 |  | 2015
Legal settlements (1) | $ | 60 |  |  | $ | — |  |  | $ | — |
Allowance for funds used during construction (US Utilities) | 26 |  |  | 29 |  |  | 17 |
Gain on sale of assets | 1 |  |  | 4 |  |  | 17 |
Contract termination | — |  |  | — |  |  | 20 |
Other | 33 |  |  | 31 |  |  | 30 |
Total other income | $ | 120 |  |  | $ | 64 |  |  | $ | 84 |
Components of Other Expense | The components are summarized as follows (in millions):
Year Ended December 31, | 2017 |  | 2016 |  | 2015
Allowance for other receivables (1) | $ | — |  |  | $ | 52 |  |  | $ | — |
Loss on sale and disposal of assets | 28 |  |  | 12 |  |  | — |
Water rights write-off | 19 |  |  | 6 |  |  | 10 |
Other | 10 |  |  | 9 |  |  | 14 |
Total other expense | $ | 57 |  |  | $ | 79 |  |  | $ | 24 |
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(1) | During the fourth quarter of 2016, we recognized a full allowance on a non-trade receivable in the MCAC SBU as a result of payment delays and discussions with the counterparty. The allowance relates to certain reimbursements the Company was expecting in connection with a legal matter. Management believes the counterparty is obligated to pay and plans to continue to attempt to fully collect the non-trade receivable.

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- Definition Tabular disclosure of the detailed components of other nonoperating income. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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