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Employee retirement benefits (Tables) | 12 Months Ended
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Dec. 31, 2014
Assumptions Used to Determine Benefit Obligations | The benefit obligations and plan assets associated with the company’s defined benefit plans are measured on December 31.
|  | Pension benefits |  |  | Other post-retirement benefits |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Assumptions used to determine benefit obligations at December 31 (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.75 |  |  |  | 4.75 |  |  |  | 3.75 |  |  |  | 4.75 |
Long-term rate of compensation increase |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |
millions of dollars |  |  |  |  |  |  |  |  |  |  |  |
Change in projected benefit obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation at January 1 |  |  | 6,870 |  |  |  | 7,336 |  |  |  | 503 |  |  |  | 547 |
Current service cost |  |  | 152 |  |  |  | 181 |  |  |  | 9 |  |  |  | 11 |
Interest cost |  |  | 322 |  |  |  | 281 |  |  |  | 26 |  |  |  | 21 |
Actuarial loss/(gain) |  |  | 1,083 |  |  |  | (504 | ) |  |  | 123 |  |  |  | (50 | )
Amendments |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Benefits paid (a) |  |  | (457 | ) |  |  | (424 | ) |  |  | (27 | ) |  |  | (26 | )
Projected benefit obligation at December 31 |  |  | 7,970 |  |  |  | 6,870 |  |  |  | 634 |  |  |  | 503 |
Accumulated benefit obligation at December 31 |  |  | 7,292 |  |  |  | 6,263 |  |  |  |  |  |  |  |  |
Change in Plan Assets of Pension and Other Postretirement Benefits |
|  | Pension benefits |  |  | Other post-retirement benefits |
millions of dollars |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Change in plan assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value at January 1 |  |  | 5,872 |  |  |  | 5,114 |  |  |  |  |  |  |  |  |
Actual return/(loss) on plan assets |  |  | 923 |  |  |  | 491 |  |  |  |  |  |  |  |  |
Company contributions |  |  | 362 |  |  |  | 600 |  |  |  |  |  |  |  |  |
Benefits paid (b) |  |  | (350 | ) |  |  | (333 | ) |  |  |  |  |  |  |  |
Fair value at December 31 |  |  | 6,807 |  |  |  | 5,872 |  |  |  |  |  |  |  |  |
Plan assets in excess of/(less than) projected benefit obligation at December 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Funded plans |  |  | (589 | ) |  |  | (424 | ) |  |  |  |  |  |  |  |
Unfunded plans |  |  | (574 | ) |  |  | (574 | ) |  |  | (634 | ) |  |  | (503 | )
Total (c) |  |  | (1,163 | ) |  |  | (998 | ) |  |  | (634 | ) |  |  | (503 | )
| (a) | Benefit payments for funded and unfunded plans.
| (b) | Benefit payments for funded plans only.
| (c) | Fair value of assets less projected benefit obligation shown above.
Amounts Recorded in Consolidated Balance Sheet and Accumulated Other Comprehensive Income |
|  | Pension benefits |  |  | Other post-retirement benefits |
millions of dollars |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Amounts recorded in the consolidated balance sheet consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  |  | (29 | ) |  |  | (25 | ) |  |  | (29 | ) |  |  | (28 | )
Other long-term obligations |  |  | (1,134 | ) |  |  | (973 | ) |  |  | (605 | ) |  |  | (475 | )
Total recorded |  |  | (1,163 | ) |  |  | (998 | ) |  |  | (634 | ) |  |  | (503 | )
Amounts recorded in accumulated other comprehensive income consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss/(gain) |  |  | 2,666 |  |  |  | 2,303 |  |  |  | 180 |  |  |  | 64 |
Prior service cost |  |  | 39 |  |  |  | 62 |  |  |  | - |  |  |  | - |
Total recorded in accumulated other comprehensive income, before tax |  |  | 2,705 |  |  |  | 2,365 |  |  |  | 180 |  |  |  | 64 |
Assumptions Used to Determine Periodic Benefit Cost |
|  | Pension benefits |  |  | Other post-retirement benefits |
|  | 2014 |  |  | 2013 |  |  | 2012 |  |  | 2014 |  |  | 2013 |  |  | 2012 |
Assumptions used to determine net periodic benefit cost for years ended December 31 (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 4.75 |  |  |  | 3.75 |  |  |  | 4.25 |  |  |  | 4.75 |  |  |  | 3.75 |  |  |  | 4.25 |
Long-term rate of return on funded assets |  |  | 6.25 |  |  |  | 6.25 |  |  |  | 6.25 |  |  |  | - |  |  |  | - |  |  |  | - |
Long-term rate of compensation increase |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |  |  |  | 4.50 |
millions of dollars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current service cost |  |  | 152 |  |  |  | 181 |  |  |  | 160 |  |  |  | 9 |  |  |  | 11 |  |  |  | 8 |
Interest cost |  |  | 322 |  |  |  | 281 |  |  |  | 288 |  |  |  | 26 |  |  |  | 21 |  |  |  | 21 |
Expected return on plan assets |  |  | (369 | ) |  |  | (331 | ) |  |  | (288 | ) |  |  | - |  |  |  | - |  |  |  | - |
Amortization of prior service cost |  |  | 23 |  |  |  | 23 |  |  |  | 23 |  |  |  | - |  |  |  | - |  |  |  | - |
Amortization of actuarial loss/(gain) |  |  | 166 |  |  |  | 243 |  |  |  | 235 |  |  |  | 7 |  |  |  | 10 |  |  |  | 8 |
Net periodic benefit cost |  |  | 294 |  |  |  | 397 |  |  |  | 418 |  |  |  | 42 |  |  |  | 42 |  |  |  | 37 |
Changes in amounts recorded in accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss/(gain) |  |  | 529 |  |  |  | (664 | ) |  |  | 530 |  |  |  | 123 |  |  |  | (50 | ) |  |  | 40 |
Amortization of net actuarial (loss)/gain included in net periodic benefit cost |  |  | (166 | ) |  |  | (243 | ) |  |  | (235 | ) |  |  | (7 | ) |  |  | (10 | ) |  |  | (8 | )
Amortization of prior service cost included in net periodic benefit cost |  |  | (23 | ) |  |  | (23 | ) |  |  | (23 | ) |  |  | - |  |  |  | - |  |  |  | - |
Total recorded in other comprehensive income |  |  | 340 |  |  |  | (930 | ) |  |  | 272 |  |  |  | 116 |  |  |  | (60 | ) |  |  | 32 |
Total recorded in net periodic benefit cost and other comprehensive income, before tax |  |  | 634 |  |  |  | (533 | ) |  |  | 690 |  |  |  | 158 |  |  |  | (18 | ) |  |  | 69 |
Summary of Change in Accumulated Other Comprehensive Income | A summary of the change in accumulated other comprehensive income is shown in the table below:
|  | Total pension and other post-retirement benefits |
millions of dollars |  | 2014 |  |  | 2013 |  |  | 2012 |
(Charge)/credit to other comprehensive income, before tax |  |  | (456 | ) |  |  | 990 |  |  |  | (304 | )
Deferred income tax (charge)/credit (note 17) |  |  | 118 |  |  |  | (256 | ) |  |  | 87 |
(Charge)/credit to other comprehensive income, after tax |  |  | (338 | ) |  |  | 734 |  |  |  | (217 | )
Fair Value of Pension Plan Assets Including Level within Fair Value Hierarchy | The 2014 fair value of the pension plan assets, including the level within the fair value hierarchy, is shown in the table below:
|  |  |  |  | Fair value measurements at December 31, 2014, using: |
millions of dollars |  | Total |  |  | Quoted prices in active markets for identical assets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
Asset class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canadian |  |  | 460 |  |  |  |  |  |  |  | 460 | (a) |  |  |  |
Non-Canadian |  |  | 2,153 |  |  |  |  |  |  |  | 2,153 | (a) |  |  |  |
Debt securities - Canadian |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  |  | 922 |  |  |  |  |  |  |  | 922 | (b) |  |  |  |
Government |  |  | 3,033 |  |  |  |  |  |  |  | 3,033 | (b) |  |  |  |
Asset backed |  |  | 5 |  |  |  |  |  |  |  | 5 | (b) |  |  |  |
Equities – Venture capital |  |  | 211 |  |  |  |  |  |  |  |  |  |  |  | 211 | (c)
Cash |  |  | 23 |  |  |  | 8 |  |  |  | 15 | (d) |  |  |  |
Total plan assets at fair value |  |  | 6,807 |  |  |  | 8 |  |  |  | 6,588 |  |  |  | 211 |
| (a) | For company equity securities held in the form of fund units that are redeemable at the measurement date, the unit value is treated as a Level 2 input. The fair value of the securities owned by the funds is based on observable quoted prices on active exchanges, which are Level 1 inputs.
| (b) | For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
| (c) | For venture capital partnership investments, fair value is generally established by using revenue or earnings multiples or other relevant market data including Initial Public Offerings.
| (d) | For cash balances that are held in Level 2 funds prior to investment in those fund units, the cash value is treated as a Level 2 input.
The 2013 fair value of the pension plan assets, including the level within the fair value hierarchy, is shown in the table below:
|  |  |  |  | Fair value measurements at December 31, 2013, using: |
millions of dollars |  | Total |  |  | Quoted prices in active markets for identical assets (Level 1) |  |  |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
Asset class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canadian |  |  | 932 |  |  |  |  |  |  |  |  |  | 932 | (a) |  |  |  |
Non-Canadian |  |  | 1,911 |  |  |  |  |  |  |  |  |  | 1,911 | (a) |  |  |  |
Debt securities - Canadian |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  |  | 654 |  |  |  |  |  |  |  |  |  | 654 | (b) |  |  |  |
Government |  |  | 2,161 |  |  |  |  |  |  |  |  |  | 2,161 | (b) |  |  |  |
Asset backed |  |  | - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage funds |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | (c)
Equities – Venture capital |  |  | 188 |  |  |  |  |  |  |  |  |  |  |  |  |  | 188 | (d)
Cash |  |  | 25 |  |  |  | 12 |  |  |  |  |  | 13 | (e) |  |  |  |
Total plan assets at fair value |  |  | 5,872 |  |  |  | 12 |  |  |  |  |  | 5,671 |  |  |  | 189 |
| (a) | For company equity securities held in the form of fund units that are redeemable at the measurement date, the unit value is treated as a Level 2 input. The fair value of the securities owned by the funds is based on observable quoted prices on active exchanges, which are Level 1 inputs.
| (b) | For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
| (c) | For mortgage funds, fair value represents the principal outstanding which is guaranteed by Canada Mortgage and Housing Corporation.
| (d) | For venture capital partnership investments, fair value is generally established by using revenue or earnings multiples or other relevant market data including Initial Public Offerings.
| (e) | For cash balances that are held in Level 2 funds prior to investment in those fund units, the cash value is treated as a Level 2 input.
Change in Fair Value of Level 3 Assets | The change in the fair value of Level 3 assets, which use significant unobservable inputs to measure fair value, is shown in the table below:
millions of dollars |  | Mortgage funds |  |  |  |  | Venture capital |
Fair value at January 1, 2014 |  |  | 1 |  |  |  |  |  | 188 |
Net realized gains/(losses) |  |  | - |  |  |  |  |  | (16 | )
Net unrealized gains/(losses) |  |  | - |  |  |  |  |  | 40 |
Net purchases/(sales) |  |  | (1 | ) |  |  |  |  | (1 | )
Fair value at December 31, 2014 |  |  | - |  |  |  |  |  | 211 |
The change in the fair value of Level 3 assets, which use significant unobservable inputs to measure fair value, is shown in the table below:
millions of dollars |  | Mortgage funds |  |  |  |  | Venture capital |
Fair value at January 1, 2013 |  |  | 1 |  |  |  |  |  | 158 |
Net realized gains/(losses) |  |  | - |  |  |  |  |  | (17) |
Net unrealized gains/(losses) |  |  | - |  |  |  |  |  | 44 |
Net purchases/(sales) |  |  | - |  |  |  |  |  | 3 |
Fair value at December 31, 2013 |  |  | 1 |  |  |  |  |  | 188 |
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets | A summary of pension plans with accumulated benefit obligations in excess of plan assets is shown in the table below:
|  | Pension benefits |
millions of dollars |  | 2014 |  |  | 2013 |
For funded pension plans with accumulated benefit obligations in excess of plan assets: |  |  |  |  |  |  |  |
Projected benefit obligation |  |  | - |  |  |  | - |
Accumulated benefit obligation |  |  | - |  |  |  | - |
Fair value of plan assets |  |  | - |  |  |  | - |
Accumulated benefit obligation less fair value of plan assets |  |  | - |  |  |  | - |
For unfunded plans covered by book reserves: |  |  |  |  |  |  |  |
Projected benefit obligation |  |  | 574 |  |  |  | 574 |
Accumulated benefit obligation |  |  | 542 |  |  |  | 496 |
Estimated 2015 Amortization from Accumulated Other Comprehensive Income | Estimated 2015 amortization from accumulated other comprehensive income
millions of dollars |  | Pension benefits |  |  | Other post-retirement benefits |
Net actuarial loss/(gain) (a) |  |  | 191 |  |  |  | 12 |
Prior service cost (b) |  |  | 18 |  |  |  | - |
| (a) | The company amortizes the net balance of actuarial loss/(gain) as a component of net periodic benefit cost over the average remaining service period of active plan participants.
| (b) | The company amortizes prior service cost on a straight-line basis.
Benefit Payments Expected | Cash flows Benefit payments expected in:
millions of dollars |  | Pension benefits |  |  | Other post-retirement benefits |
2015 |  |  | 385 |  |  |  | 29 |
2016 |  |  | 395 |  |  |  | 29 |
2017 |  |  | 405 |  |  |  | 30 |
2018 |  |  | 410 |  |  |  | 30 |
2019 |  |  | 420 |  |  |  | 30 |
2020 - 2024 |  |  | 2,140 |  |  |  | 155 |
Effect of One Percent Change in Assumptions at Which Retirement Liabilities Could be Effectively Settled | A one percent change in the assumptions at which retirement liabilities could be effectively settled is as follows:
Increase/(decrease) millions of dollars |  | One percent increase |  |  | One percent decrease |
Rate of return on plan assets: |  |  |  |  |  |  |  |
Effect on net benefit cost, before tax |  |  | (60 | ) |  |  | 60 |
Discount rate: |  |  |  |  |  |  |  |
Effect on net benefit cost, before tax |  |  | (70 | ) |  |  | 90 |
Effect on benefit obligation |  |  | (1,100 | ) |  |  | 1,400 |
Rate of pay increases: |  |  |  |  |  |  |  |
Effect on net benefit cost, before tax |  |  | 35 |  |  |  | (30 | )
Effect on benefit obligation |  |  | 190 |  |  |  | (170 | )
Effect of One Percent Change in Assumed Health-Care Cost Trend Rate | A one percent change in the assumed health-care cost trend rate would have the following effects:
Increase/(decrease) millions of dollars |  | One percent increase |  |  | One percent decrease |
Effect on service and interest cost components |  |  | 4 |  |  |  | (3 | )
Effect on benefit obligation |  |  | 70 |  |  |  | (55 | )

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