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v3.22.1

Retirement Benefits | 3 Months Ended
--- | ---
Mar. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Retirement Benefits | Retirement Benefits Net pension and retiree health benefit (income) cost included the following components:
| Defined Benefit Pension Plans
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Components of net periodic benefit cost: |  |  |  |  |  |  |
Service cost | $ | 89.1 |  |  | $ | 92.0 |  |  |  |  |
Interest cost | 100.5 |  |  | 84.3 |  |  |  |  |
Expected return on plan assets | (239.5) |  |  | (238.0) |  |  |  |  |
Amortization of prior service cost | 0.7 |  |  | 1.1 |  |  |  |  |
Recognized actuarial loss | 87.0 |  |  | 121.8 |  |  |  |  |
Net periodic benefit cost | $ | 37.8 |  |  | $ | 61.2 |  |  |  |  |
| Retiree Health Benefit Plans
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Components of net periodic benefit income: |  |  |  |  |  |  |
Service cost | $ | 11.2 |  |  | $ | 11.7 |  |  |  |  |
Interest cost | 9.4 |  |  | 8.1 |  |  |  |  |
Expected return on plan assets | (37.9) |  |  | (36.6) |  |  |  |  |
Amortization of prior service benefit | (13.7) |  |  | (14.9) |  |  |  |  |
Recognized actuarial loss | 0.2 |  |  | 0.8 |  |  |  |  |
Net periodic benefit income | $ | (30.8) |  |  | $ | (30.9) |  |  |  |  |

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