Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Income Statement [Abstract]
Net Sales	$ 15,617.2	$ 13,057.7	$ 12,912.9
Costs and Expenses
Cost of sales	10,423.0	8,652.3	8,679.5
Selling, general and administrative	3,236.5	2,599.5	2,542.0
Provision for credit losses	3.9	29.0	26.3
Other, net	190.1	217.8	201.1
Loss (gain) on sales of businesses	0.6	13.5	(17.0)
Restructuring charges	14.5	73.8	138.4
Gain on equity method investment	(68.0)	0.0	0.0
Loss on debt extinguishments	0.0	46.9	17.9
Interest income	(9.8)	(17.5)	(51.9)
Interest expense	185.4	222.6	282.2
Costs and Expenses, Total	13,976.2	11,837.9	11,818.5
Earnings from continuing operations before income taxes and equity interest	1,641.0	1,219.8	1,094.4
Income taxes on continuing operations	61.4	43.0	126.8
Net earnings from continuing operations before equity interest	1,579.6	1,176.8	967.6
Share of net earnings (losses) of equity method investment	19.0	9.1	(11.2)
Net earnings from continuing operations	1,598.6	1,185.9	956.4
Less: Net (losses) earnings attributable to non-controlling interests	(1.7)	0.9	2.2
Net earnings from continuing operations attributable to Stanley Black & Decker, Inc.	1,600.3	1,185.0	954.2
Less: Preferred stock dividends and beneficial conversion feature	14.2	24.1	1.8
Net Earnings from Continuing Operations Attributable to Common Shareowners	1,586.1	1,160.9	952.4
Add: Contract adjustment payments accretion	1.3	1.7	1.7
Net Earnings from Continuing Operations Attributable to Common Shareowners - Diluted	1,587.4	1,162.6	954.1
Earnings from discontinued operations before income taxes	70.2	47.2	35.6
Income taxes on discontinued operations	(18.7)	(1.6)	34.0
Net earnings from discontinued operations	88.9	48.8	1.6
Net Earnings Attributable to Common Shareowners - Diluted	1,676.3	1,211.4	955.7
Net Earnings Attributable to Stanley Black & Decker, Inc.	$ 1,689.2	$ 1,233.8	$ 955.8
Basic earnings per share of common stock:
Continuing operation (USD per share)	$ 9.99	$ 7.53	$ 6.42
Discontinued operations (USD per share)	0.56	0.32	0.01
Total basic earnings per share of common stock (USD per share)	10.55	7.85	6.43
Diluted earnings per share of common stock:
Continuing operations (USD per share)	9.62	7.16	6.10
Discontinued operations (USD per share)	0.54	0.30	0.01
Total diluted earnings per share of common stock (USD per share)	$ 10.16	$ 7.46	$ 6.11