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Equity, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | $ 4,017.0 |  |
Reclassification of the stranded tax effects of the Tax Act |  | $ 0.0 |
Balance at end of period | 4,530.3 | 4,017.0 |
Accumulated Other Comprehensive Loss |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (390.2) | (201.0) | $ (469.0)
Other comprehensive income (loss) before reclassification, net of tax | (56.0) | (185.9) | 250.9
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 15.3 | 20.2 | 17.1
Reclassification of the stranded tax effects of the Tax Act |  | (23.5) |
Balance at end of period | (430.9) | (390.2) | (201.0)
Foreign Currency Translation Adjustments |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (197.5) | (33.2) | (273.5)
Other comprehensive income (loss) before reclassification, net of tax | (40.4) | (164.3) | 240.3
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 0.0 | 0.0 | 0.0
Reclassification of the stranded tax effects of the Tax Act |  | 0.0 |
Balance at end of period | (237.9) | (197.5) | (33.2)
Foreign currency translation adjustments, tax | 0.0 | 0.0 | 0.0
Unrealized Gain (Loss) on Cash Flow Hedges |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | 0.2 | (0.2) | (0.1)
Other comprehensive income (loss) before reclassification, net of tax | 0.1 | 0.4 | (0.1)
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 0.0 | 0.0 | 0.0
Reclassification of the stranded tax effects of the Tax Act |  | 0.0 |
Balance at end of period | 0.3 | 0.2 | (0.2)
Unrealized (gain) loss on cash flow hedges, tax | 0.0 | (0.1) | 0.1
Pension and postretirement benefit plan adjustment |  |  |
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) |  |  |
Balance at beginning of period | (192.9) | (167.6) | (195.4)
Other comprehensive income (loss) before reclassification, net of tax | (15.7) | (22.0) | 10.7
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax | 15.3 | 20.2 | 17.1
Reclassification of the stranded tax effects of the Tax Act |  | (23.5) |
Balance at end of period | (193.3) | (192.9) | (167.6)
Pension and postretirement benefit plan adjustment, tax | 5.3 | 6.6 | (3.4)
Amounts reclassified from Accumulated Other Comprehensive Income (Loss), tax | $ (4.9) | $ (6.4) | $ (9.1)

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