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Goodwill - Narrative (Details) | 12 Months Ended
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Dec. 31, 2017
Disclosure of information for cash-generating units [line items] |
Explanation of period over which management has projected cash flows, period | 5 years
BELL MEDIA |
Disclosure of information for cash-generating units [line items] |
Decrease in perpetuity growth rate resulting in recoverable amount being equal to carrying value (as a percent) | 30.00%
Increase in discount rate resulting in recoverable amount being equal to carrying amount (as a percent) | 20.00%

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- Definition Amount By Which Value Assigned To Discount Rate Applied To Cash Flow Projections Must Change In Order For Units Recoverable Amount To Be Equal To Carrying Amount + References No definition available. + Details
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- Definition Amount By Which Value Assigned To Growth Rate Used To Extrapolate Cash Flow Projections Must Change In Order For Unit's Recoverable Amount To Be Equal To Carrying amount + References No definition available. + Details
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- Details
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