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RETIREMENT PLANS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Other (income) expense |  |  |
Other Pension Plan Information |  |  |
Settlement expense before tax | $ 51.6 | $ 35.3 |
Settlement expense after tax | 38.9 | 26.8 |
U.S. Pension. | Pension |  |  |
Net periodic benefit costs |  |  |
Service cost | 40.8 | 43.9 | $ 68.4
Interest cost on benefit obligation | 65.3 | 51.4 | 70.3
Expected return on plan assets | (144.4) | (152.3) | (152.9)
Recognition of net actuarial loss (gain) | 30.2 | 56.7 | 51.9
Amortization of prior service benefit | (4.5) | (6.9) | (7.4)
Curtailments and settlements (a) | 51.6 | 35.3 | 2.5
Total expense | 39.0 | 28.1 | 32.8
U.S. Pension. | U.S. Postretirement Benefits |  |  |
Net periodic benefit costs |  |  |
Service cost | 0.8 | 1.0 | 1.2
Interest cost on benefit obligation | 3.3 | 2.9 | 4.4
Expected return on plan assets | (0.3) | (0.4) | (0.4)
Recognition of net actuarial loss (gain) | (0.6) | 0.7 | 0.1
Amortization of prior service benefit |  |  | (11.0)
Total expense | 3.2 | 4.2 | (5.7)
International Pension | Pension |  |  |
Net periodic benefit costs |  |  |
Service cost | 28.4 | 31.4 | 30.8
Interest cost on benefit obligation | 22.0 | 17.3 | 22.3
Expected return on plan assets | (69.8) | (70.7) | (63.9)
Recognition of net actuarial loss (gain) | 22.8 | 28.7 | 26.1
Amortization of prior service benefit | (0.1) | (0.1) | (0.1)
Curtailments and settlements (a) |  | 3.5 | 2.2
Total expense | $ 3.3 | $ 10.1 | 17.4
Discontinued Operations |  |  |
Net periodic benefit costs |  |  |
Service cost |  |  | $ 2.5

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