CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Income Statement [Abstract]
Net Sales	$ 4,158.9	$ 4,393.0	$ 8,090.7	$ 8,841.0
Costs and Expenses
Cost of sales	3,226.8	3,185.9	6,323.1	6,328.5
Selling, general and administrative	834.4	849.4	1,657.4	1,798.6
Provision for credit losses	2.9	3.3	5.0	14.4
Other, net	66.6	79.1	130.3	141.1
(Gain) loss on sales of businesses	0.0	(0.2)	7.6	(0.2)
Asset impairment charge	0.0	168.4	0.0	168.4
Restructuring charges	4.6	19.5	16.7	72.2
Interest income	(45.2)	(6.5)	(85.0)	(9.3)
Interest expense	144.6	78.2	275.5	132.9
Costs and Expenses	4,234.7	4,377.1	8,330.6	8,646.6
(Loss) earnings from continuing operations before income taxes	(75.8)	15.9	(239.9)	194.4
Income taxes on continuing operations	(253.3)	(62.8)	(229.6)	(39.9)
Net earnings (loss) from continuing operations	177.5	78.7	(10.3)	234.3
Less: Net earnings attributable to non-controlling interests	0.0	0.1	0.0	0.2
Net Earnings (Loss) from Continuing Operations Attributable to Common Shareowners	177.5	78.6	(10.3)	234.1
Add: Contract adjustment payments accretion	0.0	0.4	0.0	0.7
Net Earnings (Loss) from Continuing Operations Attributable to Common Shareowners - Diluted	177.5	79.0	(10.3)	234.8
(Loss) earnings from discontinued operations before income taxes (including 2023 pre-tax loss on Security sale of $0.8 million)	(0.8)	6.4	(0.8)	28.6
Income taxes on discontinued operations	(0.3)	(2.6)	(0.3)	(0.2)
Net (loss) earnings from discontinued operations	(0.5)	9.0	(0.5)	28.8
Net Earnings (Loss) Attributable to Common Shareowners - Diluted	177.0	88.0	(10.8)	263.6
Net Earnings (Loss) Attributable to Stanley Black & Decker, Inc.	177.0	87.6	(10.8)	262.9
Total Comprehensive Income (Loss) Attributable to Common Shareowners	$ 147.9	$ (190.1)	$ 12.9	$ (42.5)
Basic earnings (loss) per share of common stock:
Continuing operations (in dollars per share)	$ 1.19	$ 0.54	$ (0.07)	$ 1.56
Discontinued operations (in dollars per share)	0	0.06	0	0.19
Total basic earnings (loss) per share of common share (in dollars per share)	1.18	0.60	(0.07)	1.75
Diluted earnings (loss) per share of common stock:
Continuing operations (in dollars per share)	1.18	0.51	(0.07)	1.47
Discontinued operations (in dollars per share)	0	0.06	0	0.18
Total diluted earnings (loss) per share of common stock (in dollars per share)	$ 1.18	$ 0.57	$ (0.07)	$ 1.65
Loss on sale of discontinued operations	$ 0.8	$ 0.0	$ 0.8	$ 0.0