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Accumulated Other Comprehensive Loss
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Accumulated Other Comprehensive Loss ACCUMULATED OTHER COMPREHENSIVE LOSS
The changes in accumulated other comprehensive loss by component are summarized below ($ in millions):
Foreign Currency Translation AdjustmentsUnrealized Gain (Loss) on Cash Flow HedgesUnrealized Pension CostsTotal Accumulated Other Comprehensive Loss
Balance, December 31, 2020$(62.5)$(6.3)$(23.0)$(91.8)
Other comprehensive loss before reclassifications:
(Decrease) increase(72.7)6.1 21.9 (44.7)
Income tax impact(17.0)(1.5)(4.7)(23.2)
Other comprehensive (loss) income before reclassifications, net of income taxes(89.7)4.6 17.2 (67.9)
Amounts reclassified from accumulated other comprehensive loss income:
Increase15.9 — 5.0 20.9 
Income tax impact(3.3)— (1.4)(4.7)
Amounts reclassified from accumulated other comprehensive loss, net of income taxes12.6 — 3.6 16.2 
Net current period other comprehensive (loss) income, net of income taxes(77.1)4.6 20.8 (51.7)
Balance, December 31, 2021$(139.6)$(1.7)$(2.2)$(143.5)
Other comprehensive loss before reclassifications:
(Decrease) increase(80.5)2.2 24.6 (53.7)
Income tax impact(20.4)(0.5)(5.2)(26.1)
Other comprehensive (loss) income before reclassifications, net of income taxes(100.9)1.7 19.4 (79.8)
Amounts reclassified from accumulated other comprehensive loss income:
Decrease— — (2.3)(2.3)
Income tax impact— — 0.5 0.5 
Amounts reclassified from accumulated other comprehensive loss, net of income taxes— — (1.8)(1.8)
Net current period other comprehensive (loss) income, net of income taxes(100.9)1.7 17.6 (81.6)
Balance, December 31, 2022$(240.5)$— $15.4 $(225.1)
Other comprehensive loss before reclassifications:
Increase (decrease)13.8 — (7.7)6.1 
Income tax impact3.0 — 1.5 4.5 
Other comprehensive income (loss) before reclassifications, net of income taxes16.8 — (6.2)10.6 
Amounts reclassified from accumulated other comprehensive loss income:
Decrease— — (3.3)(3.3)
Income tax impact— — 0.6 0.6 
Amounts reclassified from accumulated other comprehensive loss, net of income taxes— — (2.7)(2.7)
Net current period other comprehensive income (loss), net of income taxes16.8 — (8.9)7.9 
Balance, December 31, 2023$(223.7)$— $6.5 $(217.2)