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ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Cost of sales | $ 11,848.5 | $ 12,663.3 | $ 10,189.1
Other, net | 320.1 | 274.8 | 189.5
Interest expense | 559.4 | 338.5 | 185.4
Total before taxes | (375.7) | 37.9 | 1,586.9
Tax effect | 94.0 | 132.4 | (55.1)
Net (Loss) Earnings Attributable to Stanley Black & Decker, Inc. | (310.5) | 1,062.5 | $ 1,689.2
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Cost of sales | (0.6) | 53.3 |
Interest expense | (6.1) | (5.8) |
Total before taxes | (6.7) | 47.5 |
Tax effect | 3.1 | (21.1) |
Net (Loss) Earnings Attributable to Stanley Black & Decker, Inc. | (3.6) | 26.4 |
Accumulated Net Investment Hedge Gain (Loss) Including Portion Attributable To Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other, net | 0.0 | 2.2 |
Tax effect | 0.0 | (0.5) |
Net (Loss) Earnings Attributable to Stanley Black & Decker, Inc. | 0.0 | 1.7 |
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total before taxes | (12.1) | (13.3) |
Tax effect | 3.0 | 3.5 |
Net (Loss) Earnings Attributable to Stanley Black & Decker, Inc. | (9.1) | (9.8) |
Actuarial losses and prior service costs / credits | Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other, net | (11.1) | (13.3) |
Settlement losses | Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other, net | $ (1.0) | $ 0.0 |

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