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POST-RETIREMENT BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2020
Employee Benefits [Abstract]  
Post-employment amounts The table below outlines where the Company’s post-employment amounts and activity are included in the financial statements: 
For the years ended December 31 2020 2019
Balance sheet obligations for:
Defined pension benefits $42  $39 
Other post-retirement benefits 1  4 
Liability in the balance sheet $43  $43 
Income statement charge included income statement for:
Defined pension benefits $2  $1 
Other post-retirement benefits (3) — 
($1) $1 
Measurements for:
Defined pension benefits ($4) ($5)
Other post-retirement benefits —  2 
($4) ($3)
The amounts recognized in the balance sheet are determined as follows:
For the years ended December 31 2020 2019
Present value of funded obligations $—  $69 
Fair value of plan assets (5) (76)
(Surplus) deficit of funded plans ($5) ($7)
Present value of unfunded obligations 47  46 
Total deficit of defined benefit pension plans $42  $39 
Impact of minimum funding requirement/asset ceiling —  — 
Liability in the balance sheet $42  $39 
The weighted average duration of the defined benefit obligation is 8 years (2019: 9 years).
 
Less than a year Between 1-2 years Between 2-5 years Over 5 years Total
Pension benefits $27  $7  $20  $95  $149 
Other post-retirement benefits —  —  1  3  4 
At December 31, 2019 $27  $7  $21  $98  $153 
Pension benefits 4  4  12  36  56 
Other post-retirement benefits —  —  —  —  — 
At December 31, 2020 $4  $4  $12  $36  $56 
Significant actuarial assumptions
The significant actuarial assumptions were as follows:
As at December 31 Pension Plans 2020 Other Post-Retirement Benefits 2020 Pension Plans 2019 Other Post-Retirement Benefits 2019
Discount rate 1.95%-2.20% 2.25  % 2.50%-3.30% 3.35  %