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SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 01, 2025 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Significant Accounting Policies [Line Items] |  |  |  |
Amounts outstanding under standby letter of credit agreements |  | $ 129.8 | $ 125.5 | $ 146.2
Supplier finance program, obligation, statement of financial position [Extensible Enumeration] |  | Accounts Payable, Current | Accounts Payable, Current | Accounts Payable, Current
Supply chain finance liability |  | $ 206.1 | $ 215.7 | $ 213.1
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Cost of goods sold, Other Operating Income (Expense), Net, Selling, general and administrative expenses |  |
Trademarks |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Impairment of asset |  | $ 181.6 | 163.8 | 163.8
Trademarks | Performance Coatings Group |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Impairment of asset | $ 17.8 |  |  |
Cost of Goods Sold |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Research and development costs |  | 224.8 | 217.3 | 196.6
SG&A |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Advertising costs |  | 393.2 | 386.9 | 394.0
Not Primary Beneficiary |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Accrued taxes |  | $ 128.3 | $ 104.9 | $ 94.8
Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Useful life of intangible assets |  | 3 years |  |
Minimum | Buildings |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life |  | 5 years |  |
Minimum | Machinery and equipment |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life |  | 3 years |  |
Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Useful life of intangible assets |  | 29 years |  |
Maximum | Buildings |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life |  | 60 years |  |
Maximum | Machinery and equipment |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life |  | 15 years |  |

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