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Accumulated Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of changes in the components of accumulated other comprehensive income
The changes in the components of AOCI, net of tax, are as follows (in millions):
Unrealized
Translation
Cash Flow
Hedges
Defined Benefit
Pension Plans
Accumulated
Other
Comprehensive Loss
Balance, December 31, 2020$(27.7)$— $(0.4)$(28.1)
Other comprehensive loss(4.2)— — (4.2)
Balance, March 31, 2021$(31.9)$— $(0.4)$(32.3)
The changes in the components of AOCI, including the tax effect, are as follows (in millions):
Three Months Ended March 31,
20212020
Unrealized translation$(4.2)$(15.0)
Defined benefit pension plans
 0.3 
Tax effect
 (0.1)
Defined benefit pension plans, net of tax
 0.2 
Cash flow hedges (0.1)
Tax effect — 
Cash flow hedges, net of tax (0.1)
Change in AOCI
$(4.2)$(14.9)