XML 183 R153.htm IDEA: XBRL DOCUMENT v3.10.0.1
Pension Plans and Other Post-Retirement Benefits - Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance $ 628  
Change in defined benefit obligations:    
Current service cost 59 $ 50
Interest income (cost) (22) (22)
Settlement losses (gains) 0 (6)
Plan amendments (1) (2)
Foreign exchange rate movement (4) 7
Change in plan assets:    
Administrative expense (1) 0
Return on plan assets (excluding amounts included in net interest expense) (156) 116
Fair value of plan assets 3,253 3,301
Defined benefit (obligation) (3,720) (3,929)
Net defined benefit liability (asset) - ending balance 467 628
Pension    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 360  
Change in defined benefit obligations:    
Current service cost 54 47
Interest income (cost) (13) (12)
Settlement losses (gains) 0 (6)
Plan amendments (1) (2)
Foreign exchange rate movement (2) 6
Change in plan assets:    
Administrative expense (1) 0
Return on plan assets (excluding amounts included in net interest expense) (156) 116
Fair value of plan assets 3,253 3,301
Defined benefit (obligation) (3,458) (3,661)
Net defined benefit liability (asset) - ending balance 205 360
Other post-retirement    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 268  
Change in defined benefit obligations:    
Current service cost 5 3
Interest income (cost) (9) (10)
Settlement losses (gains) 0 0
Plan amendments 0 0
Foreign exchange rate movement (2) 1
Change in plan assets:    
Administrative expense 0 0
Return on plan assets (excluding amounts included in net interest expense) 0 0
Fair value of plan assets 0 0
Defined benefit (obligation) (262) (268)
Net defined benefit liability (asset) - ending balance 262 268
Present value of defined benefit obligation    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 3,929 3,807
Change in defined benefit obligations:    
Current service cost 59 50
Interest income (cost) (127) (132)
Actuarial losses (gains) (264) 218
Benefits paid (195) (170)
Settlement losses (gains) 0 (86)
Plan amendments (1) (2)
Foreign exchange rate movement 65 (20)
Change in plan assets:    
Net defined benefit liability (asset) - ending balance 3,720 3,929
Present value of defined benefit obligation | Pension    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 3,661 3,545
Change in defined benefit obligations:    
Current service cost 54 47
Interest income (cost) (118) (122)
Actuarial losses (gains) (253) 209
Benefits paid (180) (159)
Settlement losses (gains) 0 (86)
Plan amendments (1) (2)
Foreign exchange rate movement 59 (15)
Change in plan assets:    
Net defined benefit liability (asset) - ending balance 3,458 3,661
Present value of defined benefit obligation | Other post-retirement    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 268 262
Change in defined benefit obligations:    
Current service cost 5 3
Interest income (cost) (9) (10)
Actuarial losses (gains) (11) 9
Benefits paid (15) (11)
Settlement losses (gains) 0 0
Plan amendments 0 0
Foreign exchange rate movement 6 (5)
Change in plan assets:    
Net defined benefit liability (asset) - ending balance 262 268
Plan assets    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance (3,301) (3,243)
Change in defined benefit obligations:    
Interest income (cost) 105 110
Benefits paid (195) (170)
Settlement losses (gains) 0 (80)
Foreign exchange rate movement 57 (9)
Change in plan assets:    
Administrative expense (1) 0
Return on plan assets (excluding amounts included in net interest expense) (156) 116
Employer contributions 142 91
Net defined benefit liability (asset) - ending balance (3,253) (3,301)
Plan assets | Pension    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance (3,301) (3,243)
Change in defined benefit obligations:    
Interest income (cost) 105 110
Benefits paid (180) (159)
Settlement losses (gains) 0 (80)
Foreign exchange rate movement 57 (9)
Change in plan assets:    
Administrative expense (1) 0
Return on plan assets (excluding amounts included in net interest expense) (156) 116
Employer contributions 127 80
Net defined benefit liability (asset) - ending balance (3,253) (3,301)
Plan assets | Other post-retirement    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability (asset) - beginning balance 0 0
Change in defined benefit obligations:    
Interest income (cost) 0 0
Benefits paid (15) (11)
Settlement losses (gains) 0 0
Foreign exchange rate movement 0 0
Change in plan assets:    
Administrative expense 0 0
Return on plan assets (excluding amounts included in net interest expense) 0 0
Employer contributions 15 11
Net defined benefit liability (asset) - ending balance $ 0 $ 0