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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement of Comprehensive Income [Abstract] |  |  |
NET INCOME | $ 354.2 | $ 673.9 | $ 637.7
Foreign Currency Translation: |  |  |
Foreign currency translation adjustments | 39.4 | 11.3 | (149.6)
Reclassification adjustments recognized in net income | 20.0 | 6.7 | 15.7
Foreign currency translation, net of tax | 59.4 | 18.0 | (133.9)
Derivatives instruments: |  |  |
Changes in fair value of derivative instruments | 11.3 | 0.0 | 0.0
Recognition of previously unrealized losses included in net income | 2.4 | 2.3 | 2.2
Income tax effect | (3.4) | (0.5) | (0.7)
Derivative instruments, net of tax | 10.3 | 1.8 | 1.5
Defined benefit pension and other postretirement plans: |  |  |
Net actuarial (losses) gains for the period | (29.2) | (14.8) | 12.6
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 7.4 | 6.7 | 7.5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | (0.1) | 0.0 | (1.0)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Other, before Tax | (3.3) | (2.5) | (1.0)
Income tax effect | 4.6 | 1.2 | (1.8)
Defined benefit pension and other postretirement plans, net of tax | (20.6) | (9.4) | 16.3
Other comprehensive income (loss), net of tax | 49.1 | 10.4 | (116.1)
Total comprehensive income | 403.3 | 684.3 | 521.6
Less: comprehensive income attributable to noncontrolling interests | 2.4 | 17.2 | 16.0
Comprehensive Income Attributable to IPG | $ 400.9 | $ 667.1 | $ 505.6

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