Pension Plans Year ended December 31 | Other Benefit Plans Year ended December 31 | ||||||||||||||
2016 | 2017 | 2016 | 2017 | ||||||||||||
Plan assets, beginning of year | $ | 365.3 | $ | 377.2 | $ | — | $ | — | |||||||
Interest income | 12.7 | 10.0 | — | — | |||||||||||
Actuarial gains (losses) in other comprehensive income (i) | 74.0 | (6.1 | ) | — | — | ||||||||||
Administrative expenses paid from plan assets | (1.2 | ) | (1.4 | ) | — | — | |||||||||
Employer contributions | 7.4 | 2.4 | — | — | |||||||||||
Employer direct benefit payments | 2.0 | 0.1 | 2.2 | 2.5 | |||||||||||
Employer direct settlement payments | — | — | — | 2.0 | |||||||||||
Settlement payments from employer | — | — | — | (2.0 | ) | ||||||||||
Settlement payments from plan (see note 19(a)) | — | (11.7 | ) | — | — | ||||||||||
Benefit payments from plan | (14.8 | ) | (10.5 | ) | — | — | |||||||||
Benefit payments from employer | (2.0 | ) | (0.1 | ) | (2.2 | ) | (2.5 | ) | |||||||
Foreign currency exchange rate changes and other | (66.2 | ) | 35.6 | — | — | ||||||||||
Plan assets, end of year | $ | 377.2 | $ | 395.5 | $ | — | $ | — |
(i) | Actuarial gains or losses are determined based on actual return on plan assets less interest income above. For 2017, includes $17.0 loss resulting from the purchase of annuities in March 2017 (see note 19(a) above). |
Pension Plans Year ended December 31 | Other Benefit Plans Year ended December 31 | ||||||||||||||
2016 | 2017 | 2016 | 2017 | ||||||||||||
Accrued benefit obligations, beginning of year | $ | 326.9 | $ | 325.6 | $ | 62.7 | $ | 65.8 | |||||||
Current service cost | 1.7 | 2.1 | 1.9 | 2.0 | |||||||||||
Past service cost and settlement/curtailment losses | — | 1.9 | — | 0.6 | |||||||||||
Interest cost | 11.1 | 8.7 | 2.6 | 2.6 | |||||||||||
Actuarial losses (gains) in other comprehensive income from: | |||||||||||||||
— Changes in demographic assumptions | (13.9 | ) | 5.4 | (6.3 | ) | 0.2 | |||||||||
— Changes in financial assumptions | 82.9 | 2.9 | 5.8 | 2.9 | |||||||||||
— Experience adjustments | (12.9 | ) | 0.1 | (0.1 | ) | 0.6 | |||||||||
Settlement payments from employer | — | — | — | (2.0 | ) | ||||||||||
Settlement payments from plan | — | (11.7 | ) | — | — | ||||||||||
Benefit payments from plan | (14.8 | ) | (10.5 | ) | — | — | |||||||||
Benefit payments from employer | (2.0 | ) | (0.1 | ) | (2.2 | ) | (2.5 | ) | |||||||
Foreign currency exchange rate changes and other | (53.4 | ) | 31.4 | 1.4 | 5.3 | ||||||||||
Accrued benefit obligations, end of year | $ | 325.6 | $ | 355.8 | $ | 65.8 | $ | 75.5 | |||||||
Weighted average duration of benefit obligations (in years) | 19 | 19 | 14 | 14 |
Pension Plans December 31 | Other Benefit Plans December 31 | ||||||||||||||
2016 | 2017 | 2016 | 2017 | ||||||||||||
Accrued benefit obligations, end of year | $ | (325.6 | ) | $ | (355.8 | ) | $ | (65.8 | ) | $ | (75.5 | ) | |||
Plan assets, end of year | 377.2 | 395.5 | — | — | |||||||||||
Excess (deficiency) of plan assets over accrued benefit obligations | $ | 51.6 | $ | 39.7 | $ | (65.8 | ) | $ | (75.5 | ) |