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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of breakdown of revenues by channel (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | $ 6,566.2 | $ 5,183.3 | $ 4,400.4
Wholesale |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,357.5 | 2,916.3 | 2,811.3
Wholesale | Technical Apparel |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 761.1 | 643.1 | 528.0
Wholesale | Outdoor Performance |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 1,551.1 | 1,309.8 | 1,329.6
Wholesale | Ball & Racquet Sports |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 1,045.3 | 963.4 | 952.7
DTC |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,208.7 | 2,267.0 | 1,589.1
DTC | Technical Apparel |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,094.7 | 1,551.2 | 1,086.1
DTC | Outdoor Performance |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 852.6 | 525.7 | 344.6
DTC | Ball & Racquet Sports |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | $ 261.4 | $ 190.1 | $ 159.4

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