EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Narrative (Details) - Stock Options - $ / shares shares in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Antidilutive securities
Anti-dilutive stock options excluded from diluted earnings per common share calculation (in shares)	1.6	18.0	2.4	20.5
Weighted average exercise price of antidilutive securities (in Canadian dollars per share)	$ 60.21	$ 54.55	$ 60.37	$ 53.66

Represents the weighted average exercise price at which grantees can acquire the shares reserved for issuance under the stock option plan.

No definition available.

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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