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BUSINESS OVERVIEW (Tables)
3 Months Ended
Mar. 29, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Reclassification of Accumulated Other Comprehensive Income
The changes in AOCI by component are summarized below ($ in millions):

Foreign
currency
translation
adjustments
Pension & post-retirement plan benefit adjustments (a)
Total
For the Three Months Ended March 29, 2024:
Balance, December 31,2023$(291.7)$(34.4)$(326.1)
Other comprehensive income (loss) before reclassifications, net of income taxes(76.5)— (76.5)
Amounts reclassified from AOCI into income:
Increase (decrease)— 0.1 
(b)
0.1 
Income tax impact— — 
(c)
— 
Amounts reclassified from AOCI into income, net of income taxes
— 0.1 0.1 
Net current period other comprehensive income (loss), net of income taxes(76.5)0.1 (76.4)
Balance, March 29, 2024$(368.2)$(34.3)$(402.5)
For the Three Months Ended March 31, 2023:
Balance, December 31, 2022$(301.4)$(24.3)$(325.7)
Other comprehensive income (loss) before reclassifications, net of income taxes13.4 — 13.4 
Amounts reclassified from AOCI into income:
Increase (decrease)— 0.1 
(b)
0.1 
Income tax impact— (0.1)(0.1)
Amounts reclassified from AOCI into income, net of income taxes
— — — 
Net current period other comprehensive income (loss), net of income taxes13.4 — 13.4 
Balance, March 31, 2023$(288.0)$(24.3)$(312.3)
(a) Includes balances relating to defined benefit plans, supplemental executive retirement plans, and other postretirement employee benefit plans.
(b) This component of AOCI is included in the computation of net periodic pension cost (refer to Note 11 in our most recently filed Form 10-K for additional details).
(c) The income tax impact amount was rounded to zero.