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Revenue (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 CAD ($) unit	Dec. 31, 2019 CAD ($)
Revenue from contracts with customers [Abstract]
Number of specialized business operating units | unit	5
Increase through business combinations, contract assets		$ 1.1
Increase through business combinations, deferred revenue		4.6
Deferred revenue	$ 199.2	$ 174.4
Percentage of gross revenue	5.00%	5.00%
Revenue from performance obligations unsatisfied (or partially unsatisfied)	$ 4,377.0	$ 4,257.0
Expected revenue recognition as contracts are completed	78.00%	77.00%
Timing expected to recognize revenue as contracts are completed	18 months

X

- Definition

The increase in contract assets resulting from business combinations. [Refer: Business combinations [member]; Contract assets]

+ References

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-Name IFRS
-Number 15
-IssueDate 2020-01-01
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- Definition

The increase in contract liabilities resulting from business combinations. [Refer: Business combinations [member]; Contract liabilities]

+ References

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X

- Definition

The percentage of the entity's revenue. [Refer: Revenue]

+ References

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-Name IFRS
-Number 8
-IssueDate 2020-01-01
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X

- Definition

The amount of revenue that was included in the contract liability balance at the beginning of the period. [Refer: Contract liabilities; Revenue from contracts with customers]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 116
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X

- Definition

The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [member]]

+ References

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- Definition

Number of specialized business operating units

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- Definition

Percentage that entity expects to recognise transaction price allocated to remaining performance obligations as revenue

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- Definition

Revenue from contracts with customers

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No definition available.

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- Definition

Timing of satisfaction of performance obligations relates to typical timing of payment

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No definition available.

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