Prior service cost

  
  
The assumptions used in determining the net periodic cost (benefit) were as follows:  


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|   | U.S. Plans |  | Non-U.S. Plans |
|   | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019 |
| Discount rate | 2.14  | % |  | Various\* |  | 4.11%/2.99%\*\* |  | 0.95  | % |  | 1.33  | % |  | 2.07  | % |
| Expected return on plan assets | 2.40  | % |  | 4.00  | % |  | 4.00  | % |  | 2.41  | % |  | 3.00  | % |  | 3.12  | % |
| Rate of compensation increase | —  | % |  | —  | % |  | 4.00  | % |  | 2.32  | % |  | 2.29  | % |  | 2.13  | % |

  
\*For the IDEX Corporation Retirement Plan, a discount rate of 3.07% was used to determine the net periodic (benefit) cost for the period January 1, 2020 through March 31, 2020, a discount rate of 2.97% was used to determine the net periodic (benefit) cost for the period April 1, 2020 through June 30, 2020, a discount rate of 2.41% was used to determine the net periodic (benefit) cost for the period July 1, 2020 through September 30, 2020 and a discount rate of 2.36% was used to determine the net periodic (benefit) cost for the period October 1, 2020 through December 31, 2020 as a result of the quarterly remeasurements that occurred in conjunction with the termination of the Plan.  
For the Pulsafeeder, Inc. Pension Plan for Hourly Employees at Rochester, New York, a discount rate of 3.21% was used to determine the net periodic (benefit) cost for the period January 1, 2020 through June 30, 2020 and a discount rate of 2.62% was used to determine the net periodic (benefit) cost for the period July 1, 2020 through December 31, 2020 as a result of the remeasurement that occurred in conjunction with the ratification of the collective bargaining agreement.  
\*\*A discount rate of 4.11% was used to determine the net periodic benefit cost for the period January 1, 2019 through August 31, 2019 and a discount rate of 2.99% was used to determine the net periodic benefit cost for the period September 1, 2019 through December 31, 2019 as a result of the remeasurement that occurred in conjunction with the decision to freeze the Plan. 

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|   | Other Benefits |
|   | 2021 |  | 2020 |  | 2019 |
| Discount rate | 2.20  | % |  | 3.09  | % |  | 4.11  | % |
| Expected return on plan assets | —  | % |  | —  | % |  | —  | % |
| Rate of compensation increase | —  | % |  | 4.00  | % |  | 4.00  | % |

  
The pretax change recognized in Accumulated other comprehensive loss on the Consolidated Balance Sheet in 2021 is as follows:

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
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|   | Pension Benefits |  | OtherBenefits |
|   | U.S. |  | Non-U.S. |  |  |
|   | (In millions) |
| Net gain (loss) in current year | $ | 0.5  |  |  | $ | 8.5  |  |  | $ | 1.0  |  |
| Prior service cost | —  |  |  | 0.5  |  |  | —  |  |
| Amortization of prior service cost (credit) | 0.1  |  |  | —  |  |  | (2.4) |  |
| Amortization of net loss (gain)  | 10.8  |  |  | 2.1  |  |  | (0.3) |  |
| Exchange rate effect on amounts in other comprehensive income | —  |  |  | 1.5  |  |  | —  |  |
| Total | $ | 11.4  |  |  | $ | 12.6  |  |  | $ | (1.7) |  |

  
The discount rates for the Company’s plans are derived by matching the plan’s cash flows to a yield curve that provides the equivalent yields on zero-coupon bonds for each maturity. The discount rate selected is the rate that produces the same present value of cash flows.  
In selecting the expected rate of return on plan assets, the Company considers the historical returns and expected returns on plan assets. The expected returns are evaluated using asset return class, variance and correlation assumptions based on the plan’s target asset allocation and current market conditions.  
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