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INCOME TAXES - Summary of Valuation Allowance For Deferred Tax Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |
Beginning Balance | $ 326.1 | $ 264.1 | $ 203.6
Additions | 16.6 | 67.0 | 69.1
Deductions | 83.0 | 5.3 | 4.3
Currency translation | (6.6) | (0.3) | 4.3
Ending Balance | 266.3 | 326.1 | 264.1
CUSA |  |  |
Income Taxes [Line Items] |  |  |
Beginning Balance | 283.2 | 240.9 | 203.6
Additions | 5.9 | 47.0 | 52.5
Deductions | 77.2 | 4.9 | 10.9
Currency translation | (6.6) | (0.2) | 4.3
Ending Balance | $ 218.5 | $ 283.2 | $ 240.9

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