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Equity, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | $ 5,384.9 |  |
Balance at end of period | 6,302.0 | $ 5,384.9 |
Accumulated Other Comprehensive Loss |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (278.1) | (430.9) | $ (390.2)
Other comprehensive income (loss) before reclassification, net of tax | (28.8) | 132.2 | (56.0)
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 20.4 | 20.6 | 15.3
Balance at end of period | (286.5) | (278.1) | (430.9)
Foreign Currency Translation Adjustment |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (86.6) | (237.9) | (197.5)
Other comprehensive income (loss) before reclassification, net of tax | (66.2) | 151.3 | (40.4)
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 0.0 | 0.0 | 0.0
Balance at end of period | (152.8) | (86.6) | (237.9)
Foreign currency translation adjustments, tax | 0.0 | 0.0 | 0.0
Unrealized Gain (Loss) on Hedging Activities |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | 0.1 | 0.3 | 0.2
Other comprehensive income (loss) before reclassification, net of tax | 0.0 | (0.2) | 0.1
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 0.0 | 0.0 | 0.0
Balance at end of period | 0.1 | 0.1 | 0.3
Unrealized (gain) loss on hedging activities, tax | 0.0 | 0.0 | 0.0
Defined Benefit Plan Liability Adjustment |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (191.6) | (193.3) | (192.9)
Other comprehensive income (loss) before reclassification, net of tax | 37.4 | (18.9) | (15.7)
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 20.4 | 20.6 | 15.3
Balance at end of period | (133.8) | (191.6) | (193.3)
Pension and postretirement benefit plan adjustment, tax | (12.3) | 7.1 | 5.3
Amounts reclassified from Accumulated Other Comprehensive Income (Loss), tax | (6.6) | (6.7) | (4.9)
Net Investment Hedges [Member] |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | $ 0.0 | $ 0.0 | $ 0.0

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