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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Cumulative foreign currency translation | $ (269.8) | $ (190.8) |
Unrecognized pension costs (net of tax benefit of $21.4 in 2021 and $64.6 in 2020) | (69.6) | (114.9) |
Unrealized gain (loss) on cash flow hedges (net of tax expense (benefit) of $3.0 in 2021 and $(3.1) in 2020) | 5.8 | (2.6) |
Total accumulated other comprehensive income (loss) | (333.6) | (308.3) |
Unrecognized pension costs, tax benefit | 21.4 | 64.6 |
Unrealized gain (loss) on cash flow hedges, tax expense (benefit) | 3.0 | (3.1) |
Foreign currency translation adjustment [Abstract] |  |  |
Foreign currency translation adjustment, pre-tax amount | (78.9) | 10.9 | $ (29.9)
Foreign currency translation adjustment, tax (expense) benefit | 0.0 | 0.0 | 0.0
Foreign currency translation adjustments, net-of-tax amount | (78.9) | 10.9 | (29.9)
Pension plans [Abstract] |  |  |
Net actuarial gains (losses) and prior service costs arising during the period, pre-tax amount | 49.3 | (37.9) | (30.6)
Net actuarial gains (losses) and prior service costs arising during the period, tax (expense) benefit | (12.5) | 9.2 | 7.4
Net actuarial gains (losses) and prior service costs arising during the period, net-of-tax amount | 36.8 | (28.7) | (23.2)
Amortization of net actuarial (gains) losses and prior service costs, pre-tax amount | 11.3 | 13.4 | 9.4
Amortization of net actuarial (gains) losses and prior service costs, tax (expense) benefit | (2.9) | (3.4) | (2.3)
Amortization of net actuarial (gains) losses and prior service costs, net-of-tax amount | 8.4 | 10.0 | 7.1
Unrealized gains (losses) on cash flow hedges [Abstract] |  |  |
Unrealized gains (losses) on cash flow hedges, pre-tax amount | 11.4 | (11.6) | 0.3
Unrealized gains (losses) on cash flow hedges, tax (expense) benefit | (3.0) | 3.1 | (0.1)
Unrealized gains (losses) on cash flow hedges, net-of-tax amount | 8.4 | (8.5) | 0.2
Total other comprehensive income (loss), pre-tax amount | (6.9) | (25.2) | (50.8)
Total other comprehensive income (loss), tax | (18.4) | 8.9 | 5.0
Total other comprehensive income (loss), net of tax | $ (25.3) | $ (16.3) | $ (45.8)

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