v3.26.1
INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2025
INCOME TAXES  
Schedule of reconciliation of income taxes at Corporation's domestic statutory tax rate

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Income taxes at domestic statutory tax rate

$

337.7

$

287.2

$

274.3

(Reduction) increase resulting from:

 

 

 

Non-deductible charges and non-taxable income

 

(8.8)

 

(3.1)

 

0.1

Tax consolidation transactions (note 25)

(29.1)

(26.9)

(33.8)

Other

 

2.2

 

(1.8)

 

(2.9)

Income taxes

$

302.0

$

255.4

$

237.7

Schedule of net deferred income tax liability and their impact on deferred income tax expense

Consolidated

Consolidated

balance sheets

income statements

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Loss carryforwards

$

3.7

$

47.7

$

44.0

$

51.1

$

0.9

Decommissioning obligation

39.6

39.3

(0.3)

(1.7)

(0.3)

Defined benefit plans

4.0

4.6

(5.7)

(5.8)

(3.1)

Property, plant and equipment

(391.2)

(387.9)

3.3

(26.4)

8.3

Goodwill, intangible assets and other assets

 

(493.2)

 

(452.1)

 

41.1

 

3.0

 

19.2

Long-term debt and derivative financial instruments

 

(6.0)

 

(0.3)

 

(0.5)

 

(0.3)

 

0.7

Other

 

20.7

 

(15.9)

 

(36.7)

 

(3.7)

 

(1.1)

$

(822.4)

$

(764.6)

$

45.2

$

16.2

$

24.6

Schedule of changes in net deferred income tax liability

  ​ ​ ​

2025

  ​ ​ ​

2024

Balance at beginning of year

$

(764.6)

$

(759.2)

Recognized in income

 

(45.2)

 

(16.2)

Recognized in other comprehensive income

(12.5)

(1.6)

Other

(0.1)

12.4

Balance at end of year

$

(822.4)

$

(764.6)