ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of sales	$ 2,893.3	$ 3,101.5	$ 9,216.4	$ 9,430.0
Interest expense	(144.6)	(91.7)	(420.1)	(224.6)
Other, net	94.0	69.1	224.3	210.2
Income taxes	61.7	40.9	291.3	80.8
Net Earnings (Loss) Attributable to Stanley Black & Decker, Inc.	$ 4.7	$ 844.6	(6.1)	1,107.5
Reclassification of Accumulated Other Comprehensive Income | (Losses) gains on cash flow hedges, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of sales			(1.1)	28.1
Interest expense			(4.6)	(4.2)
Total before taxes			(5.7)	23.9
Income taxes			2.8	(13.5)
Net Earnings (Loss) Attributable to Stanley Black & Decker, Inc.			(2.9)	10.4
Reclassification of Accumulated Other Comprehensive Income | Gains on net investment hedges, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other, net			0.0	2.2
Income taxes			0.0	(0.5)
Net Earnings (Loss) Attributable to Stanley Black & Decker, Inc.			0.0	1.7
Reclassification of Accumulated Other Comprehensive Income | Pension (losses) gains, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before taxes			(8.9)	(10.4)
Income taxes			1.9	2.6
Net Earnings (Loss) Attributable to Stanley Black & Decker, Inc.			(7.0)	(7.8)
Reclassification of Accumulated Other Comprehensive Income | Actuarial losses and prior service costs / credits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other, net			(8.3)	(10.2)
Reclassification of Accumulated Other Comprehensive Income | Settlement loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other, net			$ (0.6)	$ (0.2)