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Sale Of Cedar Point (Tables) | 12 Months Ended
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Dec. 31, 2017
Cedar Point Wind Facility |
Non Current Assets Or Disposal Groups Classified As Held For Sale [Line Items] |
Schedule of assets and liabilities of the business held for sale | The table below details the assets and liabilities of the renewable energy business that were held for sale as at December 31, 2016:
($ millions) |  |  |
Assets |  |  |
| Accounts receivable |  | 23 |
| Property, plant and equipment, net |  | 284 |
Total assets |  | 307 |
Liabilities |  |  |
| Accounts payable and accrued liabilities |  | 12 |
| Other long-term liabilities |  | 10 |
| Provisions |  | 9 |
Total liabilities |  | 31 |

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