XML 193 R112.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Post-employee benefit plans - Other comprehensive income (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Employee Benefits [Abstract] |  |
Cumulative losses recognized directly in equity, January 1 | $ (2,646) | $ (2,384)
Actuarial (losses) gains in other comprehensive income | (313) | (264)
(Increase) decrease in the effect of the asset limit | (25) | 2
Cumulative losses recognized directly in equity, December 31 | (2,984) | $ (2,646)
Cumulative actuarial losses | 3,217 |
Cumulative decrease in the effect of the asset limit | $ 233 |

X
- Definition Employee Benefits [Abstract] + References No definition available. + Details
Name: | bce_EmployeeBenefitsAbstract
Namespace Prefix: | bce_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reserve Of Measurements Of Defined Benefit Plans, Actuarial Gains (Loss), Before Tax + References No definition available. + Details
Name: | bce_ReserveOfMeasurementsOfDefinedBenefitPlansActuarialGainsLossBeforeTax
Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reserve Of Measurements Of Defined Benefit Plans, Before Tax + References No definition available. + Details
Name: | bce_ReserveOfMeasurementsOfDefinedBenefitPlansBeforeTax
Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reserve Of Measurements Of Defined Benefit Plans, Effect Of Asset Limit, Before Tax + References No definition available. + Details
Name: | bce_ReserveOfMeasurementsOfDefinedBenefitPlansEffectOfAssetLimitBeforeTax
Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the gain (loss) on changes in the effect of limiting a net defined benefit asset to the asset ceiling, excluding amounts included in interest income or expense. [Refer: Interest income; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration