CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Income Statement [Abstract]
Net Sales	$ 4,197.1	$ 3,129.4
Costs and Expenses
Cost of sales	2,632.8	2,106.3
Selling, general and administrative	847.4	737.8
Provision for credit losses	5.5	10.7
Other, net	59.0	74.9
Loss on sale of business	1.0	0.0
Restructuring charges	2.3	3.9
Interest expense	47.5	59.7
Interest income	(2.9)	(10.1)
Costs and Expenses	3,592.6	2,983.2
Earnings before income taxes and equity interest	604.5	146.2
Income taxes	119.5	12.9
Net earnings before equity interest	485.0	133.3
Share of net earnings (losses) of equity method investment	1.8	(0.2)
Net earnings	486.8	133.1
Less: Net losses attributable to non-controlling interests	(0.6)	(0.1)
Net earnings attributable to Stanley Black & Decker, Inc.	487.4	133.2
Less: Preferred stock dividends	9.4	0.0
Net Earnings Attributable to Common Shareowners	478.0	133.2
Total Comprehensive Income (Loss) Attributable to Common Shareowners	$ 380.3	$ (125.6)
Earnings per share of common stock:
Basic (in shares)	$ 3.04	$ 0.89
Diluted (in shares)	2.98	0.88
Dividends per share of common stock (in dollars per share)	$ 0.70	$ 0.69
Weighted Average Shares Outstanding (in thousands):
Basic (in shares)	157,490	150,330
Diluted (in shares)	160,220	151,903